ro13-9904 and Syphilis

ro13-9904 has been researched along with Syphilis* in 57 studies

Reviews

12 review(s) available for ro13-9904 and Syphilis

ArticleYear
Syphilitic osteomyelitis in a patient with HIV and cognitive biases in clinical reasoning: A case report.
    Medicine, 2022, Oct-07, Volume: 101, Issue:40

    Diagnosing multifactorial, multidimensional symptoms unexplained by presumptive diagnosis is often challenging for infectious disease specialists.. We report a rare case of a 30-year-old Japanese bisexual man with a history of virally suppressed human immunodeficiency virus and syphilis infections who developed chest pain and an erosive lesion under the lower midline jaw.. Imaging examinations revealed erosive lesions on the sternum and left the ninth rib. Biopsy and polymerase chain reaction testing of sternal tissue specimens were noncontributory. However, due to elevated rapid plasma regain levels, a diagnosis of syphilitic osteomyelitis and gumma of the jaw was made.. The patient was treated with 5 weeks of intravenous ceftriaxone and then with 8 weeks of oral amoxicillin.. After the antibiotic treatment, bone pain disappeared. We conducted a literature review on syphilitic osteomyelitis, and all of the articles included were case reports. Approximately half of the 46 patients with syphilitic osteomyelitis had HIV coinfection, and 10 (22%) patients lacked signs of early syphilis. Given its rarity, clinical data to establish appropriate guidelines for diagnosing and treating syphilitic osteomyelitis are still lacking. Cognitive biases, such as anchoring, cognitive overload bias, and premature closure, may contribute to diagnostic delays.. In cases of idiopathic multiple bone lesions, syphilis must always be ruled out, and clinicians should guard against cognitive pitfalls when diagnosing rare diseases.

    Topics: Adult; Amoxicillin; Anti-Bacterial Agents; Bias; Ceftriaxone; Clinical Reasoning; Cognition; HIV Infections; Humans; Male; Osteomyelitis; Syphilis

2022
Efficacy and Safety of Treatments for Different Stages of Syphilis: a Systematic Review and Network Meta-Analysis of Randomized Controlled Trials and Observational Studies.
    Microbiology spectrum, 2022, 12-21, Volume: 10, Issue:6

    Parenteral penicillin is the first-line regimen for treating syphilis. However, allergic reactions and poor drug tolerance still present challenging problems with respect to use of this antibiotic. This study aimed to evaluate the efficacy and safety of ceftriaxone, erythromycin, minocycline, tetracycline, and doxycycline for syphilis treatment, compared with penicillin, to determine which antibiotic could be a better substitute for penicillin. This study included 17 articles, comprising 3 randomized controlled trials (RCTs) and 14 observational studies and involving 4,485 syphilis patients. Estimated risk ratios (RRs) and 95% confidence interval (CIs) were used to compare the serological response rates. At the 6- and 12-month follow-ups, the serological response rates were compared by direct meta-analysis and network meta-analysis (NMA). Based on direct meta-analysis, the serological response rates at the 3- and 24-month follow-ups were compared. Our NMA showed a higher serological response rate for ceftriaxone than for penicillin at the 6-month follow-up (RR of 1.12, 95% CI of 1.02 to 1.23). Ceftriaxone was equally effective as penicillin for syphilis in terms of serological response rates, and it was a better substitute for penicillin than ceftriaxone, erythromycin, minocycline, tetracycline, or doxycycline. However, more large-scale, high-quality, double-blind trials are still needed to determine whether ceftriaxone can safely replace penicillin for the treatment of syphilis when necessary.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Erythromycin; Humans; Hypersensitivity; Minocycline; Network Meta-Analysis; Observational Studies as Topic; Penicillins; Randomized Controlled Trials as Topic; Syphilis; Tetracycline

2022
Comparison of efficacy of treatments for early syphilis: A systematic review and network meta-analysis of randomized controlled trials and observational studies.
    PloS one, 2017, Volume: 12, Issue:6

    Parenteral penicillin is the first-line regimen for treating syphilis, but unsuitable for some patients due to penicillin allergy and lacking health resources. Unfortunately, the efficacy of penicillin alternatives remains poorly understood. This study aimed to assess the efficacy of ceftriaxone and doxycycline/tetracycline in treating early syphilis relative to that of penicillin, and thereby to determine which antibiotic is a better replacement for penicillin.. By searching literature from PubMed, Cochrane Central Register of Controlled Trials, Embase, the Web of Science, and ClinicalTrials.gov and systematically screening relevant studies, eligible randomized controlled trials (RCTs) and observational studies on treatments with penicillin, doxycycline/tetracycline, and ceftriaxone for early syphilis were identified and combined in this systematic review. Estimated risk ratios (RRs) and 95% confidence intervals (CIs) were utilized to compare their serological response and treatment failure rates. At 12-month follow up, serological response rates were compared by a direct meta-analysis and network meta-analysis (NMA), while treatment failure rates were compared with a direct meta-analysis.. Three RCTs and seven cohort studies were included in this research. The results of NMA demonstrated that no significant differences existed in serological response rate at 12-month follow-up between any two of the three treatments (doxycycline/tetracycline vs. penicillin RR = 1.01, 95%CI 0.89-1.14; ceftriaxone vs. penicillin RR = 1.00, 95%CI 0.89-1.13; ceftriaxone vs. doxycycline/tetracycline RR = 0.99, 95%CI 0.96-1.03), which was consistent with the outcomes of the direct meta-analysis. In addition, the direct meta-analysis indicated that, at 12-month follow-up, penicillin and ceftriaxone treatment groups had similar treatment failure rates (RR = 0.92, 95%CI 0.12-6.93), while treatment failure rate was significantly lower among penicillin recipients than among doxycycline/tetracycline recipients (RR = 0.58, 95%CI 0.38-0.89).. Ceftriaxone is as effective as penicillin in treating early syphilis with regard to serological response and treatment failure rate. Compared with doxycycline/tetracycline, ceftriaxone appears to be a better choice as the substitution of penicillin.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Drug Therapy, Combination; Humans; Observational Studies as Topic; Penicillins; Randomized Controlled Trials as Topic; Syphilis; Tetracycline; Treatment Outcome

2017
Meta-analysis of ceftriaxone compared with penicillin for the treatment of syphilis.
    International journal of antimicrobial agents, 2016, Volume: 47, Issue:1

    Penicillin is the gold standard for treating syphilis. However, allergic reactions, poor drug tolerance and limited efficacy in patients remain a challenging problem. The objective of this meta-analysis was to compare the efficacy of ceftriaxone and penicillin based on data obtained from published randomised controlled trials (RCTs). The Cochrane Library, Medline, EBSCO, EMBASE and Ovid databases were searched for RCTs of ceftriaxone vs. penicillin for the treatment of syphilis. Estimated risk ratios (RRs) and 95% confidence intervals (CIs) were used to investigate the following outcome measures: 3-month response rate; 6-month response rate; 12-month response rate; relapse rate; serofast rate; and failure rate. Seven RCTs involving 281 participants (159 patients who received ceftriaxone and 122 patients who received penicillin) were included in the meta-analysis. There were no significant differences in 3-month response rate (RR=1.12, 95% CI 0.89-1.42), 6-month response rate (RR=1.02, 95% CI 0.75-1.38), 12-month response rate (RR=1.04, 95% CI 0.82-1.32), relapse rate (RR=0.91, 95% CI 0.45-1.84), serofast rate (RR=0.69, 95% CI 0.22-2.12) or failure rate (RR=0.66, 95% CI 0.03-15.76) in patients treated with ceftriaxone compared with those treated with penicillin. In conclusion, there is no evidence in the literature that ceftriaxone is less efficient than penicillin.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Humans; Penicillins; Randomized Controlled Trials as Topic; Recurrence; Syphilis; Treatment Outcome

2016
Syphilis treatment in the presence of HIV: the debate goes on.
    Current opinion in infectious diseases, 2015, Volume: 28, Issue:1

    Benzathine Penicillin G has been used to treat syphilis for over 50 years; however, the precise regimen of penicillin for treatment of syphilis in HIV-positive individuals remains a hot topic of debate. Although international guidelines recommend the same treatment for syphilis, regardless of HIV status, there are inconsistencies in prescribing practices among clinicians.. Two previous systematic reviews have found limited evidence for enhanced treatment of syphilis in the presence of HIV. However, a growing body of literature indicates that the rate of asymptomatic neurosyphilis may be higher in HIV, and that syphilis infection is associated with poorer long-term neurocognitive outcomes. A number of retrospective studies propose that serological response may be slower, or serological failure may be higher, among HIV-positive individuals, but these studies are limited by high loss to follow-up, high reinfection rates and a focus on serological rather than clinical response. Beyond penicillin, some evidence suggests equivalence of macrolides, cephalosporins and doxycycline, although macrolide resistance is an increasing concern.. Until a prospective, randomized study is conducted, inconsistency with treatment will continue. We offer a pragmatic approach to recognizing patients who may require further investigation or neuropenetrative antibiotic treatment.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Coinfection; Doxycycline; Drug Resistance, Bacterial; HIV Infections; Humans; Penicillin G Benzathine; Recurrence; Spinal Puncture; Syphilis; Syphilis Serodiagnosis; Treponema pallidum

2015
[Haematuria, lymphadenopathy and splenomegaly: case report in a 22-year-old man and review of the literature].
    Der Urologe. Ausg. A, 2010, Volume: 49, Issue:11

    A 22-year-old patient attended the urological office with unclear bladder symptoms, haemorrhoids and haematuria. Splenomegaly was detected by ultrasound together with the suspicion of a bladder cyst. Computed tomography revealed mesenteric, retroperitoneal and inguinal lymph node swelling. The laboratory diagnostics produced the diagnosis of syphilis. The patient was successfully treated with ceftriaxone and benzylpenicillin benzathine.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Hematuria; Humans; Lymphatic Diseases; Male; Penicillin G Benzathine; Splenomegaly; Syphilis; Treatment Outcome; Young Adult

2010
Current controversies in the management of adult syphilis.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2007, Apr-01, Volume: 44 Suppl 3

    Clinical management of patients with syphilis is controversial. This article summarizes recent research on syphilis treatment efficacy and outcomes and is based on a comprehensive systematic review of published literature, relevant abstracts, conference proceedings, technical reports, and guidelines. Penicillin remains the drug of choice for the treatment of syphilis. Although several studies have suggested that azithromycin may have clinical efficacy, macrolide resistance has been widely documented among strains of Treponema pallidum, and treatment failures have been reported. Ceftriaxone is effective for the treatment of syphilis when used in multiple-dose regimens. Lumbar puncture should be performed for human immunodeficiency virus-infected patients with syphilis of >1 year's duration and a serum nontreponemal test titer > or =1 : 32, as well for other patients for whom the clinical suspicion of neurosyphilis is high. Newer laboratory tests for syphilis are undergoing extensive evaluation and may prove to be useful for future clinical care. American and European approaches to syphilis treatment are similar, but they vary across several parameters.

    Topics: Adult; Anti-Bacterial Agents; Azithromycin; Ceftriaxone; Drug Resistance, Bacterial; Humans; Male; Neurosyphilis; Penicillins; Syphilis; Treatment Outcome; Treponema pallidum

2007
Syphilis treatment: old and new.
    Expert opinion on pharmacotherapy, 2005, Volume: 6, Issue:13

    Syphilis has challenged scientists and clinicians since its first appearance in the late 1400s and debate continues to surround the best practice in management. Difficulties in defining the goals of successful treatment have contributed to problems in determining recommendations for the ideal management. Treatment regimens currently in use were developed before randomised controlled trials became standard. This, combined with national differences in disease definition, staging and varying interpretations of the studies, as well as the emergence of complicating comorbid conditions, such as HIV, has resulted in a lack of consensus for treatment. This paper will discuss the history and current treatment of syphilis focusing on dilemmas faced by clinicians today, including the emergence of a resistant strain. Despite the difference between current national guidelines, penicillin G largely remains the treatment of choice. Close follow up, monitoring and ensuring adequate compliance remain the most important aspects in the treatment of syphilis.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Drug Hypersensitivity; Female; HIV Infections; Humans; Infant, Newborn; Patient Compliance; Penicillin G; Practice Guidelines as Topic; Pregnancy; Pregnancy Complications, Infectious; Randomized Controlled Trials as Topic; Syphilis

2005
[Changing epidemiological profile and treatment of syphilis and gonorrhea].
    Duodecim; laaketieteellinen aikakauskirja, 2002, Volume: 118, Issue:13

    Topics: Anti-Infective Agents; Ceftriaxone; Cephalosporins; Ciprofloxacin; Contact Tracing; Drug Resistance, Bacterial; Female; Finland; Gonorrhea; Humans; Penicillin G Procaine; Pregnancy; Pregnancy Complications, Infectious; Syphilis

2002
Use of third-generation cephalosporins. Spirochetes.
    Hospital practice (Office ed.), 1991, Volume: 26 Suppl 4

    Although dosing schedules are still being worked out, ceftriaxone has been shown to be effective in both primary and secondary syphilis. In our experience, ceftriaxone was the drug of choice for the treatment of Lyme disease.

    Topics: Animals; Borrelia burgdorferi Group; Ceftriaxone; Cephalosporins; Humans; Lyme Disease; Syphilis; Treponema pallidum

1991
Ceftriaxone in treatment of serious infections. Sexually transmitted diseases.
    Hospital practice (Office ed.), 1991, Volume: 26 Suppl 5

    The most recent CDC guidelines for treatment of STDs list a number of syndromes for which ceftriaxone is the recommended therapy, including those caused by N. gonorrhoeae and H. ducreyi. The drug has successfully eradicated incubating syphilis. Its use in primary, secondary, and latent syphilis is promising, although adequate data regarding optimal dose and duration of therapy are not yet available. It remains to be seen whether ceftriaxone represents the sun rising on a new era of successful STD treatment or the sun setting on the old penicillin era.

    Topics: Ceftriaxone; Female; Gonorrhea; Humans; Male; Sexually Transmitted Diseases; Syphilis

1991
Beta-lactams in sexually transmitted diseases: rationale for selection and dosing regimens.
    European journal of clinical microbiology, 1984, Volume: 3, Issue:6

    A review is given of the selection and rational of optimal treatment regimens for patients with sexually transmitted pathogens, e.g. in cases of gonorrhea, chlamydial infections, chancroid, syphilis, pelvic inflammatory diseases and ophthalmia neonatorum. The scientific basis for the selection of a beta-lactam agent is discussed, including dose, MIC, the critical serum level and maintenance interval, and the duration of therapy. Except in the case of penicillinase-producing Neiserria gonorrhoeae, penicillin remained until recently the most effective agent available against many sexually transmitted diseases. However, ceftriaxone, a new third-generation cephalosporin, has been shown to have a long half-life (8 h) and excellent in vitro efficacy against Neiserria gonorrhoeae (including penicillinase-producing strains) and Haemophilis ducreyi. In view of its exceptional clinical efficacy against both gonorrhea and chancroid, clinical studies of its efficacy against other sexually transmitted diseases appear warranted.

    Topics: Anti-Bacterial Agents; Cefotaxime; Ceftriaxone; Cephalosporins; Chancroid; Chlamydia Infections; Female; Gonorrhea; Humans; Infant, Newborn; Male; Ophthalmia Neonatorum; Pelvic Inflammatory Disease; Penicillins; Sexually Transmitted Diseases; Syphilis; Time Factors; Urethritis

1984

Trials

6 trial(s) available for ro13-9904 and Syphilis

ArticleYear
A Multicenter Study Evaluating Ceftriaxone and Benzathine Penicillin G as Treatment Agents for Early Syphilis in Jiangsu, China.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2017, Oct-30, Volume: 65, Issue:10

    The aim of this study was to assess the efficacy of ceftriaxone and benzathine penicillin G (BPG) in nonpregnant, immunocompetent adults with early syphilis because there is a lack of clinical evidence supporting ceftriaxone as an alternative treatment for early syphilis without an human immunodeficiency virus coinfection.. A randomized, open-label controlled study evaluating the efficacy of ceftriaxone and BPG was conducted in 4 hospitals in Jiangsu Province. Treatment comprised either ceftriaxone (1.0 g, given intravenously, once daily for 10 days) or BPG (2.4 million units, given intramuscularly, once weekly for 2 weeks). A serological response was defined as a ≥4-fold decline in the rapid plasma reagin (RPR) titer.. In all, 301 patients with early syphilis were enrolled in this study; 230 subjects completed the follow-ups. The serological response at 6 months of follow up was observed in 90.2% in ceftriaxone group and 78.0% in BPG group (P = .01). There was no significant difference between treatment groups in patients with primary or early latent syphilis, but among patients with secondary syphilis the difference was highly significant (95.8% vs 76.2%; P < .01). Moreover, patients exhibiting a Jarisch-Herxheimer reaction after treatment might have a shorter period before a serological response (P = .03).. In this study, ceftriaxone regimen was noninferior to the BPG regimen in nonpregnant, immunocompetent patients with early syphilis.. ChiCTR-TQR-13003624.

    Topics: Adolescent; Adult; Aged; Anti-Bacterial Agents; Ceftriaxone; China; Female; Follow-Up Studies; Humans; Male; Middle Aged; Penicillin G Benzathine; Syphilis; Syphilis Serodiagnosis; Young Adult

2017
A new enhanced antibiotic treatment for early and late syphilis.
    Journal of global antimicrobial resistance, 2016, Volume: 5

    The objective of this study was to evaluate the efficacy of an enhanced treatment regimen for syphilis with the addition of doxycycline and ceftriaxone to the conventional benzathine penicillin G (BPG) treatment. Sixty-nine syphilis patients were recruited and were randomly assigned to two groups: group 1 (38 patients) received standard therapy and group 2 (31 patients) received the enhanced therapy. All patients were followed-up for at least 12 months. Patients underwent physical examination and serology every 6 months as well as echocardiography and neurological examination every year. A three- to four-fold decline in the initial Venereal Disease Research Laboratory (VDRL) titre within 6 months after therapy was considered as serological cure. At 12 months, 68% of patients in group 1 and 100% in group 2 were serologically cured (P=0.002). During follow-up, no patients in group 2 experienced complications related to syphilis. In contrast, one patient in group 1 developed neurosyphilis. In conclusion, the enhanced treatment is more effective than standard treatment and results in a higher and faster cure rate. Moreover, it provides treponemicidal antibiotic levels in the cerebrospinal fluid, thereby preventing possible late complications.

    Topics: Adult; Aged; Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Female; Humans; Male; Middle Aged; Penicillin G Benzathine; Syphilis; Syphilis Serodiagnosis; Young Adult

2016
A study evaluating ceftriaxone as a treatment agent for primary and secondary syphilis in pregnancy.
    Sexually transmitted diseases, 2005, Volume: 32, Issue:8

    To evaluate the efficacy of ceftriaxone in pregnant women who were diagnosed with early syphilis.. Eleven women with a history of penicillin allergy, positive skin test, but prior history of safe usage of cephalosporins were included. Ceftriaxone (250 mg) was given intramuscularly once daily for 7 and 10 days to patients with primary and secondary syphilis, respectively. A second course of therapy was provided at 28 weeks' gestation. The rapid plasma reagin test (RPR) was measured before and after therapy. The blood of neonates was also tested at delivery and during the follow-up period.. The serum RPR titers of 11 mothers decreased fourfold, 3 months after treatment. Ten patients developed negative RPR results. The serum RPR was negative at delivery or 6 months after delivery in all neonates.. Ceftriaxone may be considered as an alternative for treatment of early syphilis in pregnancy.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Drug Administration Schedule; Female; Humans; Injections, Intramuscular; Pregnancy; Pregnancy Complications, Infectious; Pregnancy Trimesters; Syphilis; Treatment Outcome; Ultrasonography, Prenatal

2005
Response of HIV-infected patients with asymptomatic syphilis to intensive intramuscular therapy with ceftriaxone or procaine penicillin.
    International journal of STD & AIDS, 2004, Volume: 15, Issue:5

    The objective of this prospective pilot study was to evaluate the response of HIV-infected patients with asymptomatic syphilis to one of two intensive antibiotic treatment regimens. Thirty-one HIV-infected patients with serum rapid plasma reagin titre > or =1:4 and no clinical findings of syphilis were randomized to receive daily intramuscular injections of ceftriaxone or procaine penicillin (plus oral probenecid) for 15 days; 24 returned for follow-up study. Seven of 10 (70%) procaine penicillin-treated patients and 10 of 14 (71%) ceftriaxone-treated patients had a > or =4-fold decline in RPR (P=0.94); two penicillin-treated and one ceftriaxone-treated patient relapsed. Two patients failed ceftriaxone therapy. Three penicillin-treated, and two ceftriaxone-treated patients were serofast. Serological responses were similar in those patients with and without asymptomatic neurosyphilis. There was no difference in the serologic response to daily treatment with ceftriaxone vs that with procaine penicillin plus probenecid; both treatments were associated with comparatively high rates of serological non-response and relapse.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Female; HIV Infections; Humans; Injections, Intramuscular; Male; Middle Aged; Penicillin G Procaine; Pilot Projects; Prospective Studies; Reagins; Recurrence; Syphilis; Treatment Outcome

2004
Ceftriaxone for the treatment of primary and secondary syphilis.
    Chemotherapy, 1989, Volume: 35, Issue:2

    In a multicenter, open, randomized, prospective, comparative study, 28 patients with primary (n = 9) or secondary (n = 19) syphilis were treated with either ceftriaxone or penicillin G. 14 patients received ceftriaxone 4 x 1 g i.m. every 2 days. 14 other patients were treated with penicillin G 1 million IU i.m. daily for 15 days (standard therapy of primary and secondary syphilis). To avoid Herxheimer reaction we applied prednisolone 50-100 mg i.m. before specific treatment. Diagnosis was confirmed by clinical symptoms, dark-field microscopy and serological tests (VDRL titer, TPHA test and 19s-IgM-FTA-abs test or SPHA test). Follow-up examinations during therapy were repeated on days 2, 4, 6 (dark-field microscopy, physical examination) and day 14 (VDRL titer). To evaluate therapeutic efficacy, serological controls were repeated 1, 2, 3, 6 and 12 months after therapy (VDRL, SPHA). In all patients, a marked decline (minimum 2-dilution decrease) in VDRL titer and resolution of clinical symptoms were noted. An adverse reaction was seen in 1 patient of the clemizol-penicillin G group (allergic penicillin exanthema). There were no adverse reactions to ceftriaxone. Summing up, there was no detectable difference in clinical and serological response to syphilis treatment either with ceftriaxone or penicillin G. Ceftriaxone, thus can be regarded as an equivalent alternative to penicillin G in the treatment of primary and secondary syphilis.

    Topics: Benzimidazoles; Ceftriaxone; Female; Humans; Male; Patient Compliance; Penicillin G; Syphilis

1989
Comparative study of ceftriaxone and benzathine penicillin G in the treatment of primary and secondary syphilis.
    Chemioterapia : international journal of the Mediterranean Society of Chemotherapy, 1987, Volume: 6, Issue:2 Suppl

    Topics: Adult; Ceftriaxone; Clinical Trials as Topic; Female; Humans; Male; Penicillin G; Penicillin G Benzathine; Random Allocation; Syphilis

1987

Other Studies

39 other study(ies) available for ro13-9904 and Syphilis

ArticleYear
Antimicrobial susceptibility of Treponema pallidum subspecies pallidum: an in-vitro study.
    The Lancet. Microbe, 2023, Volume: 4, Issue:12

    The increasing incidence of syphilis and the limitations of first-line treatment with penicillin, particularly in neurosyphilis, neonatal syphilis, and pregnancy, highlight the need to expand the therapeutic repertoire for effective management of this disease. We assessed the in-vitro efficacy of 18 antibiotics from several classes on Treponema pallidum subspecies pallidum (T pallidum), the syphilis bacteria.. Using the in-vitro culture system for T pallidum, we exposed the pathogen to a concentration range of each tested antibiotic. After a 7-day incubation, the treponemal burden was evaluated by quantitative PCR targeting the T pallidum tp0574 gene. The primary outcome was the minimum inhibitory concentration (MIC) at which the quantitative PCR values were not significantly higher than the inoculum wells. We also investigated the susceptibility of macrolide-resistant strains to high concentrations of azithromycin, and the possibility of developing resistance to linezolid, a proposed candidate for syphilis treatment.. Amoxicillin, ceftriaxone, several oral cephalosporins, tedizolid, and dalbavancin exhibited anti-treponemal activity at concentrations achievable in human plasma following regular dosing regimens. The experiments revealed a MIC for amoxicillin at 0·02 mg/L, ceftriaxone at 0·0025 mg/L, cephalexin at 0·25 mg/L, cefetamet and cefixime at 0·0313 mg/L, cefuroxime at 0·0156 mg/L, tedizolid at 0·0625 mg/L, spectinomycin at 0·1 mg/L, and dalbavancin at 0·125 mg/L. The MIC for zoliflodacin and balofloxacin was 2 mg/L. Ertapenem, isoniazid, pyrazinamide, and metronidazole had either a poor or no effect. Azithromycin concentrations up to 2 mg/L (64 times the MIC) were ineffective against strains carrying mutations associated to macrolide resistance. Exposure to subtherapeutic doses of linezolid for 10 weeks did not induce phenotypic or genotypic resistance.. Cephalosporins and oxazolidinones are potential candidates for expanding the current therapeutic repertoire for syphilis. Our findings warrant testing efficacy in animal models and, if successful, clinical assessment of efficacy.. European Research Council.

    Topics: Amoxicillin; Animals; Anti-Bacterial Agents; Azithromycin; Ceftriaxone; Drug Resistance, Bacterial; Globus Pallidus; Humans; Infant, Newborn; Linezolid; Macrolides; Syphilis; Treponema; Treponema pallidum

2023
Etiological Surveillance of Male Urethritis Syndrome in South Africa: 2019 to 2020.
    Sexually transmitted diseases, 2022, 08-01, Volume: 49, Issue:8

    In South Africa, male urethritis syndrome (MUS) is the most common sexually transmitted infection (STI) syndrome in men. We determined the distribution of STI etiologies and the susceptibility profiles of Neisseria gonorrhoeae isolates from men presenting with MUS to 3 sentinel surveillance health care facilities. Secondary objectives were to determine the seroprevalence of coinfections (HIV, syphilis, herpes simplex virus 2).. Consecutive, consenting men with symptomatic urethral discharge were enrolled between January 1, 2019, and December 31, 2020. Genital discharge swab and blood specimens were collected and transported to a central STI reference laboratory in Johannesburg, South Africa.. Among 769 men enrolled, N. gonorrhoeae was the commonest cause of MUS (674 [87.8%]; 95% confidence interval [CI], 85.2%-89.9%), followed by Chlamydia trachomatis (161 [21.0%]; 95% CI, 18.2%-24.0%). Of 542 cultivable N. gonorrhoeae isolates, all were susceptible to ceftriaxone (modal minimum inhibitory concentration, 0.004 mg/L) and azithromycin (modal minimum inhibitory concentration, 0.128 mg/L). Seroprevalence rates of HIV, syphilis, and HSV-2 were 21.4% (95% CI, 18.5%-24.5%), 2.3%, and 50.1%, respectively. Condom use at last sexual encounter was reported by only 7%, less than 50% had been medically circumcised, and only 66.7% (58 of 87) who self-reported an HIV-positive status were adherent on antiretroviral drugs.. Neisseria gonorrhoeae and C. trachomatis were the predominant causes of MUS. Currently recommended dual ceftriaxone and azithromycin therapy are appropriate for MUS syndromic management; however, surveillance must be maintained to timeously detect emerging and increasing gonococcal resistance. Clinic-based interventions must be intensified in men seeing sexual health care to reduce the community transmission and burden of STI and HIV.

    Topics: Azithromycin; Ceftriaxone; Chlamydia trachomatis; Gonorrhea; Herpesvirus 2, Human; HIV Infections; Humans; Male; Neisseria gonorrhoeae; Seroepidemiologic Studies; Sexually Transmitted Diseases; South Africa; Syphilis; Urethritis

2022
Sexually Transmitted Infections: Updates From the 2021 CDC Guidelines.
    American family physician, 2022, 05-01, Volume: 105, Issue:5

    Sexually transmitted infection (STI) rates are increasing for most nationally notifiable disease categories in the United States. The 2021 Centers for Disease Control and Prevention STI guidelines provide several updated, evidence-based testing and treatment recommendations. The recommended treatment for gonorrhea is ceftriaxone monotherapy given intramuscularly, with dosing based on the patient's body weight. For chlamydia, doxycycline is the preferred treatment. A test-of-cure is recommended for all cases of pharyngeal gonorrhea and for rectal chlamydia if treated with azithromycin. Vaginal trichomoniasis should be treated with a seven-day regimen of metronidazole. Treatment of pelvic inflammatory disease routinely includes metronidazole with doxycycline and an increased dosage of ceftriaxone. Syphilis of less than one year's duration should be treated with a single dose of intramuscular penicillin G benzathine, 2.4 million units. Syphilis of more than one year's or unknown duration should be treated with three consecutive weekly doses of intramuscular penicillin G benzathine, 2.4 million units each. A thorough evaluation for otic, ophthalmic, and neurologic symptoms is essential for anyone with syphilis because these complications can occur at any stage and require 10 to 14 days of treatment with intravenous aqueous crystalline penicillin G. Family physicians can reduce STI rates by taking a thorough sexual history, especially in teens and young adults, ordering screening tests and treatment based on the updated Centers for Disease Control and Prevention STI guidelines, and collaborating with public health departments for disease reporting and partner services.

    Topics: Adolescent; Ceftriaxone; Centers for Disease Control and Prevention, U.S.; Chlamydia Infections; Doxycycline; Female; Gonorrhea; Humans; Metronidazole; Penicillin G Benzathine; Sexually Transmitted Diseases; Syphilis; United States; Young Adult

2022
[Ocular syphilis associated to HIV: A report of 2 patients treated in Marrakech, Morocco].
    Medecine tropicale et sante internationale, 2022, 06-30, Volume: 2, Issue:2

    Syphilis is a sexually transmitted disease. All organs might be affected, but ocular syphilis occurs only in 0.6 percent of patients. A resurgence of syphilis cases has been observed for several years in many countries, especially in HIV-infected subjects. These patients often present with concomitant primary and secondary lesions or extensive presentations of syphilis.. We report 2 patients with syphilitic uveitis diagnosed and treated at the department of infectious diseases at the University hospital of Marrakech. Ocular involvement was inaugural in both HIV patients. Each had a specific treatment, but none had a complete recovery of visual function; the first patient was treated by ceftriaxone and the second one was treated by penicillin.. Syphilis must be discussed in all patients diagnosed with uveitis or papillitis. The diagnosis should be suspected in cases of eye inflammation even in the absence of favourable clinical presentation or anamnesis. Search for HIV co-infection should be systematic. Although not evidence-based, prompt therapy may lead to functional recovery. Ceftriaxone could be a suitable alternative to penicillin in the treatment of early syphilis in HIV-infected patients. This treatment has a concomitant effectiveness even for asymptomatic forms of neurosyphilis. Ocular syphilis is a form of neurosyphilis and requires neurosyphilis therapy regardless of when it develops after primary infection.Conventional syphilis staging is of little use in understanding ocular syphilis. Co-infection between HIV and ocular syphilis is common, but does not affect response to a neurosyphilis regimen of penicillin in the short term.

    Topics: Ceftriaxone; Coinfection; Endophthalmitis; Eye Infections, Bacterial; HIV Infections; Humans; Morocco; Neurosyphilis; Penicillins; Syphilis; Uveitis

2022
[Isolation of Neisseria meningitidis in anorectal specimen in a men who have sex with men with uretritis and primary syphilis].
    Revista chilena de infectologia : organo oficial de la Sociedad Chilena de Infectologia, 2022, Volume: 39, Issue:3

    Neisseria meningitidis is a Gram-negative bacterium frequently associated with invasive diseases with high mortality. Although its natural reservoir is the human nasopharynx, in recent years there have been increasing reports of isolation of this agent in the anorectal mucosa, mainly in men who have sex with men (MSM). We present the case of an HIV-positive MSM who consulted for urethritis and primary syphilis, in which N. meningitidis was isolated in an anorectal specimen. He was treated empirically with ceftriaxone and azithromycin, and a post-treatment control culture was negative. Despite the increase in anogenital infections and colonization by N. meningitidis, its role is unknown as a genital pathogen and in the transmission of other infections and the need for specific therapeutic regimens.

    Topics: Azithromycin; Ceftriaxone; Homosexuality, Male; Humans; Male; Neisseria meningitidis; Sexual and Gender Minorities; Syphilis

2022
Diffuse Phlebitis in Patients with Syphilitic Outer Retinopathy.
    Ocular immunology and inflammation, 2021, Nov-17, Volume: 29, Issue:7-8

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Electroretinography; Eye Infections, Bacterial; Female; Fluorescein Angiography; Glucocorticoids; Humans; Male; Middle Aged; Phlebitis; Prednisolone; Retinal Vein; Retrospective Studies; Scotoma; Syphilis; Tomography, Optical Coherence; Visual Acuity; Visual Field Tests; Visual Fields; White Dot Syndromes

2021
Atypical secondary syphilis presentation in a patient with human immunodeficiency virus infection: a case report.
    Journal of medical case reports, 2019, Dec-09, Volume: 13, Issue:1

    Untreated syphilis may lead to severe complications. This infection has recently re-emerged in developed countries with a high number of cases coinfected with human immunodeficiency virus. In these patients, the skin lesions of secondary syphilis can be very atypical.. We report the case of a 38-year-old Bulgarian homosexual man who was coinfected with human immunodeficiency virus and syphilis. His skin contained multiple extensive necrotic lesions with abundant purulent secretion that covered his face, lips, scalp, and torso. Initial clinical diagnoses included varicella pustulosa and staphylococcal dermatitis. Human immunodeficiency virus infection in our patient had been established 2 years earlier in prophylactic studies, but had not been treated. Due to lack of penicillin, he was successfully treated with ceftriaxone, and the skin lesions underwent complete reversal. He also began antiretroviral therapy, which resulted in a significant effect on his immune status. Three months after the onset of antiretroviral therapy, he also achieved optimal viral suppression.. This case emphasizes the importance of considering cutaneous secondary syphilis in the differential diagnosis of any inflammatory cutaneous disorder in individuals infected with human immunodeficiency virus.

    Topics: Adult; Anti-Bacterial Agents; Anti-HIV Agents; Antiretroviral Therapy, Highly Active; Ceftriaxone; Coinfection; Diagnosis, Differential; Emtricitabine, Tenofovir Disoproxil Fumarate Drug Combination; HIV Infections; Humans; Male; Syphilis; Syphilis, Cutaneous

2019
Treatment evaluation to improve preventing mother to child transmission among women with syphilis.
    Scientific reports, 2019, 12-20, Volume: 9, Issue:1

    The aim of this study was to evaluate the effectiveness of preventing mother to child syphilis transmission to improve pregnancy outcomes. We performed a retrospective analysis of municipal databases of mother-to-child syphilis transmission. Pregnant women with syphilis were included. Group specific pregnancy outcomes were analyzed according to treatment. A total of 28 pregnant women were diagnosed with syphilis in 2012; 321 were diagnosed with syphilis in 2018. A prevalence of 0.14% was observed amongst pregnant women in Suzhou city from 2012-2018. Primary treatments included benzathine penicillin, ceftriaxone sodium or erythromycin when patients were allergic to Benzathine penicillin. The treatment coverage was 81.57%, and only 52.86% of pregnant women were adequately treated. Adverse pregnant outcomes were higher amongst untreated women. Expanding early screening coverage and promoting treatment were key to improving pregnancy outcomes amongst women with syphilis.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Erythromycin; Female; Humans; Infectious Disease Transmission, Vertical; Middle Aged; Penicillin G Benzathine; Pregnancy; Pregnancy Complications, Infectious; Pregnancy Outcome; Prenatal Care; Retrospective Studies; Syphilis; Young Adult

2019
Syphilis in Pregnancy: The Reality in a Public Hospital.
    Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia, 2019, Volume: 41, Issue:2

     The present study assessed epidemiological and obstetrical data from pregnant women with syphilis at the Hospital de Clínicas of the Universidade Federal do Triângulo Mineiro (UFTM, in the Portuguese acronym), describing this disease during pregnancy and its vertical transmission for future healthcare actions..  Records from pregnant women who had been admitted to the Obstetrics Department of the Hospital de Clínicas of the UFTM and were diagnosed with syphilis between 2007 and 2016 were reviewed. A standardized form was used to collect epidemiological, obstetric data and outcomes of congenital infection. The present research has been authorized by the Ethics Committee of the institution..  There were 268 women diagnosed with syphilis, with an average age of 23.6 years old. The majority of the patients were from Uberaba. Inadequate prenatal care was observed in 37.9% of the pregnant women. Only 34.2% of the patients completed the treatment according to the guidelines issued by the Ministry of Health of Brazil, and 19.8% of the partners of the patients underwent adequate syphilis treatment; 37 (13.8%) couples (patients and partners) underwent correct treatment. Regarding the obstetric outcomes, 4 (1.5%) patients had a miscarriage and 8 (3.4%) had fetal losses (from the fetal loss group, 7 had no adequate treatment); 61 (25.9%) patients had premature births - this prematurity has been significantly correlated to inadequate or incomplete treatment in 49 (27.9%) patients, compared with 12 (13.0%) patients with premature births and adequate treatment (.  Public awareness policies on adequate prenatal care, intensification of serological screening, and early treatment of syphilis are needed, considering the rise of cases diagnosed during gestation and its potentially preventable deleterious consequences related to congenital transmission..  O presente estudo avaliou dados epidemiológicos e obstétricos de gestantes com sífilis no Hospital de Clínicas da Universidade Federal do Triângulo Mineiro (UFTM), objetivando o conhecimento desta infecção no ciclo gravídico e a transmissão vertical para futuras ações em saúde pública. MéTODOS::  Foram revisados registros de gestantes admitidas no Departamento de Ginecologia e Obstetrícia do Hospital de Clínicas da UFTM, diagnosticadas com sífilis entre 2007 e 2016. Para a coleta de dados, utilizou-se um formulário padronizado enfocando aspectos epidemiológicos, obstétricos e infecção congênita. A presente pesquisa foi autorizada pelo Comitê de Ética da instituição.

    Topics: Anti-Bacterial Agents; Brazil; Ceftriaxone; Drug Administration Schedule; Female; Hospitalization; Hospitals, Public; Humans; Infant, Newborn; Male; Penicillin G Benzathine; Pregnancy; Pregnancy Complications, Infectious; Prenatal Diagnosis; Prognosis; Retrospective Studies; Syphilis; Syphilis, Congenital; Treatment Outcome; Young Adult

2019
Intravenous Ceftriaxone for Syphilitic Uveitis.
    Ocular immunology and inflammation, 2018, Volume: 26, Issue:7

    Report of clinical/multimodal imaging outcomes of patients with syphilitic uveitis alternatively treated with intravenous(IV) ceftriaxone, due to unavailability of penicillin G.. Chart review of all cases of syphilitic uveitis presenting to Hospital São Geraldo/HC-UFMG and treated with intravenous ceftriaxone, between January and August 2014. Clinical, serological and ophthalmological data were collected.. Twelve consecutive patients with syphilitic uveitis receiving IV ceftriaxone were identified. All 24 eyes had active intraocular inflammation on clinical examination. All patients received IV ceftriaxone (2-4 g daily) for 14-21 days, supplemented with oral corticosteroid as needed in 9 patients (75%), after documented clinical response. Improvement in intraocular inflammation was seen in all 24 eyes, with median best-corrected visual acuity (BCVA) increasing from 20/50 to 20/20, after a mean follow-up of 5.3 months.. IV ceftriaxone may be an effective alternative for treatment of syphilitic uveitis, in the setting of unavailability of penicillin G.

    Topics: Administration, Oral; Adult; Aged; Anti-Bacterial Agents; Ceftriaxone; Chorioretinitis; Complementary Therapies; Eye Infections, Bacterial; Fluorescein Angiography; Glucocorticoids; Humans; Infusions, Intravenous; Male; Middle Aged; Multimodal Imaging; Retrospective Studies; Syphilis; Syphilis Serodiagnosis; Tomography, Optical Coherence; Uveitis, Posterior; Visual Acuity

2018
Severe knee joint damage from syphilitic arthritis.
    Arthritis & rheumatology (Hoboken, N.J.), 2018, Volume: 70, Issue:1

    Topics: Anti-Bacterial Agents; Arthritis; Ceftriaxone; Humans; Knee Joint; Male; Middle Aged; Syphilis; Tomography, X-Ray Computed; Treponema pallidum

2018
Amoxicillin and Ceftriaxone as Treatment Alternatives to Penicillin for Maternal Syphilis.
    Emerging infectious diseases, 2017, Volume: 23, Issue:5

    There is no proven alternative to penicillin for treatment of maternal syphilis. We report 2 case-patients with maternal syphilis who were successfully treated without penicillin. We used amoxicillin and probenecid for the first case-patient and amoxicillin, probenecid, and ceftriaxone for the second case-patient.

    Topics: Adult; Amoxicillin; Anti-Bacterial Agents; Ceftriaxone; Drug Substitution; Female; Humans; Infant, Newborn; Penicillin G Benzathine; Penicillins; Pregnancy; Pregnancy Complications, Infectious; Pregnancy Outcome; Syphilis; Treatment Outcome; Young Adult

2017
Clinical Manifestations and Outcome of Syphilitic Uveitis.
    Investigative ophthalmology & visual science, 2016, Volume: 57, Issue:2

    To analyze visual outcome, effectiveness of various modes of antibiotic treatment, and prognostic factors in patients with serologically proven syphilitic uveitis.. The clinical records of 85 patients (139 eyes) diagnosed with syphilitic uveitis between 1984 and 2013 at tertiary centers in The Netherlands were retrospectively analyzed.. Mean age was 47 years (range, 27-73 years), 82.4% were male. HIV positivity was found in 28 (35.9%) patients; 13 were newly diagnosed. Most patients had pan (45.9%) or posterior (31.8%) uveitis. On average, logMAR visual acuity (VA) improved significantly from 0.55 at the start of syphilis treatment to 0.34 at 1 month and to 0.27 at 6 months follow-up. Most patients (86.7%) reached disease remission. No differences in efficacy between the various treatment regimens were found. A high logMAR VA at the start of syphilis treatment and a treatment delay of more than 12 weeks were prognostic for a high logMAR VA at 6 months follow-up. Chronicity was not related to any form of treatment, HIV status, or Venereal Disease Research Laboratory test outcome.. In this large cohort of 85 patients with syphilitic uveitis, visual outcomes were favorable in the majority of cases. Visual outcome was dependent on VA at the start of syphilis treatment and treatment delay.

    Topics: Administration, Oral; Adult; Aged; Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Drug Therapy, Combination; Eye Infections, Bacterial; Female; HIV Seropositivity; Humans; Infusions, Intravenous; Injections, Intramuscular; Male; Middle Aged; Penicillin G; Penicillin G Procaine; Retrospective Studies; Syphilis; Syphilis Serodiagnosis; Treatment Outcome; Uveitis; Visual Acuity

2016
Acquired Syphilis With Anemia and Leukoerythroblastic Reaction: A Case Report.
    Annals of internal medicine, 2016, 08-02, Volume: 165, Issue:3

    Topics: Aged; Anemia, Myelophthisic; Anti-Bacterial Agents; Ceftriaxone; Hematopoiesis, Extramedullary; Humans; Male; Syphilis

2016
[Ocular syphilis: A retrospective study of 27 cases in Nantes University Hospital (France) from 2000 to 2013].
    La Revue de medecine interne, 2015, Volume: 36, Issue:11

    Syphilis may manifest as several distinct ophthalmological forms. The main objective of our study was to describe the diagnostic, therapeutic data and prognosis of ocular syphilis.. We retrospectively analysed the cases of syphilitic uveitis diagnosed in the University Hospital of Nantes between 2000 and 2013.. Twenty-seven patients were included in our study. Their mean age was 53.1 years. Bilateral uveitis was the most frequent clinical presentation (67%). The average diagnostic delay after the first symptoms was 2.8 months. Three patients (11%) presented with an anterior uveitis and 24 (89%) with a posterior uveitis, panuveitis or papillitis. The most frequent clinical signs were papillar lesion (44%), multifocal choroiditis (33%) and chorio-retinitis (37%). Ninety-three percent of the patients were treated with benzathine penicillin intravenously, one patient was treated by intramuscular penicillin injections and another by ceftriaxone intramuscularly. Ocular manifestations alone were sufficient to make the diagnosis of syphilis in 25 patients (93%) and of HIV seroconversion in 3 patients (11%). Forty-one percent of the patients benefited from an adjuvant therapy with corticosteroids. The treatment allowed a visual improvement of -0.48 log MAR (P<0.0001) with an average reduction of retinal central thickness of 70.2 μm (P=0.33).. We did not find a significant difference neither in management nor in results between the HIV seropositive and HIV seronegative groups. Others studies remains controversial about this aspect. The increased frequency of ocular manifestation as well as the increase of syphilis makes systematic screening in uveitis of a great value.

    Topics: Adult; Aged; Aged, 80 and over; Anti-Bacterial Agents; Ceftriaxone; Delayed Diagnosis; Drug Therapy, Combination; Female; France; Glucocorticoids; Hospitals, University; Humans; Male; Middle Aged; Penicillin G Benzathine; Retrospective Studies; Syphilis; Uveitis

2015
[Cutaneous manifestation of late-type syphilis].
    Deutsche medizinische Wochenschrift (1946), 2014, Volume: 139, Issue:38

    A 49-year-old, otherwise healthy man presented at his dermatologist with tuberous skin changes that had be present for several weeks on head, arm and leg. These were asymptomatic, but disturbed him cosmetically. A skin biopsy was performed.. The skin biopsy showed a granulomatous inflammation with prominent plasma cells, consistent with granulomatous infiltrate. Serologic tests confirmed a Treponema pallidum-infection. In addition, the patient was tested positive for hepatitis C and HIV (CDC stage A1). The clinical neurological examination did not show any pathological findings, however, analysis of the cerebrospinal fluid revealed a mild pleocytosis, elevation of protein and the glucose quotient and a normal Treponema pallidum TPPA-antibody index. A mesaortitis was excluded.. We diagnosed a tertiary syphilis (stage III). The patient refused prolonged inpatient treatment with penicillin G i.v., as recommended as first-line therapy in the national guidelines for asymptomatic neurosyphilis. Therefore, after a single oral administration of 100 mg prednisolone he received ceftriaxone intravenously for 14 days. The skin changes resolved. With regard to the HIV infection anti-retro-viral therapy was not yet indicated.. In view of the increasing incidence of syphilis in Germany clinicians should consider this diagnosis when confronted with oligosymptomatic skin lesions.

    Topics: Administration, Oral; Biopsy; Ceftriaxone; Comorbidity; Diagnosis, Differential; Drug Therapy, Combination; Hepatitis C, Chronic; HIV Seropositivity; Humans; Infusions, Intravenous; Male; Middle Aged; Neurosyphilis; Prednisolone; Skin; Syphilis; Syphilis Serodiagnosis; Syphilis, Cutaneous

2014
[Tertiary syphilis of the pancreas and liver in 82-year-old patient: case study].
    Eksperimental'naia i klinicheskaia gastroenterologiia = Experimental & clinical gastroenterology, 2013, Issue:7

    It has been described a clinical case of late diagnosis of syphilis of the pancreas and liver of elderly patients. Two years before that it was wrongly diagnosed with cancer of the pancreas with liver metastases, and the patient was operated on with the imposition of cholecystostomy. It was conducted appropriate therapy and reconstructive surgery after verification of the diagnosis of syphilis of the pancreas and liver.

    Topics: Aged, 80 and over; Anti-Bacterial Agents; Ceftriaxone; Diagnosis, Differential; Diagnostic Errors; Humans; Liver Diseases; Liver Neoplasms; Male; Pancreatic Diseases; Pancreatic Neoplasms; Syphilis; Syphilis Serodiagnosis; Treatment Outcome

2013
Ocular syphilis, a case of acute posterior placoid chorioretinitis.
    Bulletin de la Societe belge d'ophtalmologie, 2013, Issue:322

    To report a case of acute posterior placoid chorioretinitis, a rare manifestation of ocular syphilis.. The patient was examined at age 59 with symptoms of subacute severe unilateral vision loss of the right eye. He underwent fundus examination, automated perimetry, optical coherence tomography imaging and fluorescein angiography. There was a close follow-up for 3 months.. At time of presentation, the visual acuity in the right eye was hand movement. Fundus examination showed a central retinal placoid yellowish lesion going beyond the temporal vascular arcades. Optical coherence tomography showed thickening of the neuroretina and disappearance of the inner and outer segment junction. Fluorescein angiography showed in the early phase areas of hypofluorescence followed by hyperfluorescence and late staining. Serologic examinations were positive for secondary syphilis. After treatment with intravenous ceftriaxone 2g/d for 2 weeks there was a complete functional recovery with regression of the fundus lesion.. Acute syphilitic posterior placoid chorioretinitis has been described as a rare chorioretinal manifestation in patients with syphilis. The pathogenesis of this entity still remains unknown. Since there are no pathognomonic features of ocular syphilis, findings may often mimic those of other diseases. Maintaining an awareness of the different manifestations of this disease allows ophthalmologists to play a key role in the early diagnosis of syphilis.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Chorioretinitis; Eye Infections, Bacterial; Fluorescein Angiography; Follow-Up Studies; Humans; Injections, Intravenous; Male; Middle Aged; Serologic Tests; Syphilis; Tomography, Optical Coherence

2013
Efficacy of ceftriaxone and doxycycline in the treatment of early syphilis.
    Medecine et maladies infectieuses, 2012, Volume: 42, Issue:1

    An increase of syphilis cases has been recorded in the past few decades, especially among HIV-infected patients. These patients often present with concomitant primary and secondary lesions or extensive presentations of syphilis.. Our goal was to compare alternative regimens to the recommended penicillin treatment.. We retrospectively studied 116 patient files (80% HIV1-infected) treated for a first episode of early syphilis.. Patients mainly presented with symptoms of secondary syphilis. In 15.5% of the cases patients were asymptomatic and 17.2% of patients with secondary syphilis presented with neurologic or ophthalmic symptoms. Some less usual clinical presentations included diffuse polyadenopathy or isolated fever. The time to serological response was similar among those treated with benzathine-penicillin (n=52), ceftriaxone (n=49), or doxycycline (n=15).. Ceftriaxone and doxycycline could be suitable alternatives to penicillin in the treatment of early syphilis in HIV-infected patients. These two treatments have a concomitant effectiveness even for asymptomatic forms of neurosyphilis.

    Topics: Adult; Asymptomatic Diseases; Ceftriaxone; Doxycycline; Drug Evaluation; Early Diagnosis; Female; HIV Infections; HIV-1; Humans; Male; Middle Aged; Neurosyphilis; Penicillin G Benzathine; Recurrence; Retrospective Studies; Syphilis; Young Adult

2012
Fluorescein and indocyanine-green angiography in ocular syphilis: an exploratory study.
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2012, Volume: 250, Issue:5

    Fluorescein (FA) and indocyanine-green angiography (ICGA) may offer valuable information concerning disease severity and prognosis in ocular syphilis. The aim of the present study is to describe angiographic patterns encountered in the context of ocular syphilis, and to explore the associations between specific angiographic manifestations and severity of disease presentation, as well as disease evolution after treatment.. We performed a retrospective institutional study with the inclusion of 23 patients with ocular syphilis presenting to the uveitis clinic of the Jules-Gonin Eye Hospital in a 10-year period. FA and ICGA were performed following a standard protocol for posterior uveitis. Patterns of fluorescence were noted, and statistical associations between each angiographic pattern and any demographic, clinical, or laboratory parameter at baseline and after treatment were sought.. The presence of any dark dots in ICGA was significantly associated with anterior uveitis (p = 0.031). The presence of hot spots in ICGA was significantly associated with longer duration of symptoms prior to initial visit (p = 0.032) and with male gender (p = 0.012). Weak non-significant trends were found associating vascular staining in FA with anterior uveitis (p = 0.066), vitritis (p = 0.069), and younger age (p = 0.061), as well as disc hyperfluorescence in FA with seropositivity for HIV (p = 0.089) and macular edema in FA with longer disease duration (p = 0.061). The presence of any dark dots in ICGA exhibited a weak trend of association with anterior uveitis and/or vitritis (p = 0.079).. Out of the several associations identified implicating specific angiographic features, we underline the possible role of the presence of dark dots in ICGA for identifying active inflammation, and the role of hot spots in ICGA as markers of long-standing disease. Vascular staining in FA appears to be more common in patients with severe ocular inflammation with presence of anterior uveitis and/or vitritis.

    Topics: Adult; Ceftriaxone; Coloring Agents; Eye Infections, Bacterial; Female; Fluorescein Angiography; Humans; Indocyanine Green; Injections, Intravenous; Male; Middle Aged; Penicillins; Retrospective Studies; Syphilis; Syphilis Serodiagnosis; Uveitis

2012
Ocular manifestations of syphilis: recent cases over a 2.5-year period.
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2010, Volume: 248, Issue:11

    The ocular manifestations of syphilis are protean and can affect every structure of the eye. There has been a recent increase of syphilis infection in Europe. We report recent cases of ocular syphilis infection in a tertiary center.. During a 2.5-year period (2005-2007) we collected the medical records of eight male patients with ocular syphilis. The diagnosis was based on serological tests on blood samples and cerebrospinal fluid. All patients underwent a check-up to rule out another etiological diagnosis and to detect the presence of any other sexually transmitted infections.. The ocular lesions included: chorioretinitis (one case), retinitis (two cases), panuveitis with macular edema (two cases), episcleritis (one case), anterior optic neuritis (one case), and retrobulbar optic neuropathy (one case). Infection of the cerebrospinal fluid was detected in three of the five patients tested. In six cases, the inflammation was unilateral, and the anatomical and functional prognosis was excellent at the 6-month follow-up visit. Co-infection with human immunodeficiency virus was reported in five patients, with a CD4 T lymphocyte count greater than 300/mm(3). Most of the patients were treated with parenteral ceftriaxone (1 g daily) for 3 weeks with good tolerance. One patient was treated with intravenous penicillin G (18 MUI daily). Only one patient with anterior optic neuritis required systemic steroid therapy associated with antibiotics. Sequelae included sectorial atrophy of the optic nerve with visual field loss (n = 1) and abnormalities of the retinal pigment epithelium (n = 3).. All patients with ocular syphilis exhibited functional improvement and resolution of ocular inflammation after a specific antibiotic treatment. As a great imitator, syphilis should be considered in all patients with uveitis, scleritis, episcleritis, or optic neuritis, especially in men with high-risk sexual behavior.

    Topics: Adult; Aged; Anti-Bacterial Agents; CD4 Lymphocyte Count; Ceftriaxone; Chorioretinitis; Doxycycline; Eye Infections, Bacterial; Fluorescent Antibody Technique; HIV Infections; Humans; Macular Edema; Male; Middle Aged; Optic Neuritis; Panuveitis; Retrospective Studies; Scleritis; Syphilis; Syphilis Serodiagnosis

2010
Atypical acute syphilitic posterior placoid chorioretinitis.
    Korean journal of ophthalmology : KJO, 2009, Volume: 23, Issue:2

    A 48-year-old man presented with visual dimness in the right eye that had developed 2 weeks previously. Dilated fundus examination showed few vitreous cells and numerous yellow, placoid lesions in both eyes. His right eye had more severe serous retinal detachment involving the macula. Fluorescein angiography demonstrated early irregular hypofluorescence with late staining in the areas of the yellow placoid lesions. He started a regimen of 60 mg of oral prednisone daily. Two weeks later, a serologic fluorescent treponemal antigen absorption test was positive for Ig G and Ig M. He was referred to an infectious disease specialist for antibiotic therapy. A week later, he returned, having stayed on prednisone only and not having taken the internist's antibiotic prescription. Meanwhile, the chorioretinitis in his right eye, which had initially been at a more advanced stage, was resolved with the use of steroids. The chorioretinitis in his left eye, which was aggravated at an earlier stage, ultimately recovered. Our case had atypical courses such that one eye improved and the other worsened during the same steroid treatment period. This result was inconsistent with that of previous reports showing that oral steroid influences the clinical course of acute syphilitic posterior placoid chorioretinitis.

    Topics: Acute Disease; Anti-Bacterial Agents; Ceftriaxone; Chorioretinitis; Diagnosis, Differential; Eye Infections, Bacterial; Fluorescein Angiography; Follow-Up Studies; Fundus Oculi; Humans; Injections, Intravenous; Male; Middle Aged; Syphilis

2009
[A case of secondary syphilis with hepatitis].
    Mikrobiyoloji bulteni, 2007, Volume: 41, Issue:2

    Hepatitis is a rare clinical manifestation of syphilis. In this report a 50 years old male patient who was diagnosed as secondary syphilis presenting with hepatitis has been discussed. The patient was admitted to the hospital with high fever and skin rash, and his history revealed a suspected sexual contact. He indicated that he had been admitted to a health center eight months ago because of the presence of a penile wound, however VDRL (Venereal Disease Research Laboratory) test was negative at that time. Fever (39.5 degrees C), jaundice in skin and sclera, generalized macular and maculopapular skin rash including palms and soles, lymphadenopathy and hepatosplenomegaly were detected in physical examination. Laboratory tests yielded elevated erythrocyte sedimantation rate, high CRP levels and elevated liver enzyme levels, however viral hepatitis markers together with VDRL and TPHA (Treponema pallidum hemagglutination) tests were found negative. Ceftriaxone therapy was initiated because of the presence of high fever (40 degrees C) and 30 leukocyte/mm3 in urine, and the absence of bacteria in Gram staining of urine sample. However, the antibiotic therapy was discontinued since fever persisted. As the clinical signs and symptoms strongly indicated syphilis, the serological tests were repeated and VDRL positivity at 1/8 and TPHA positivity at 1/1280 titers were detected. Ceftriaxone therapy was restarted and continued for 14 days with complete cure. Since the spouse of the patient was also found VDRL and TPHA positive, she was treated with penicilin. The presentation of this case emphasized the importance of repeating the serological tests for syphilis since they might be negative in the early stages of infection. The case also indicates that syphilis should be considered in the differential diagnosis of hepatitis.

    Topics: Anti-Bacterial Agents; Cardiolipins; Ceftriaxone; Cholesterol; Diagnosis, Differential; Exanthema; Female; Fever; Hemagglutination Tests; Hepatitis; Hepatomegaly; Humans; Jaundice; Lymphatic Diseases; Male; Middle Aged; Phosphatidylcholines; Splenomegaly; Syphilis; Syphilis Serodiagnosis

2007
Symptomatic relapse of neurologic syphilis after benzathine penicillin G therapy for primary or secondary syphilis in HIV-infected patients.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2006, Sep-15, Volume: 43, Issue:6

    We describe 3 symptomatic cases of neurologic syphilis that occurred after the administration of the usual therapy for primary or secondary syphilis in human immunodeficiency virus (HIV)-infected patients. We discuss the difficulty of diagnosing neurosyphilis, the need for lumbar puncture, and risk factors of relapse. Because HIV infection may alter the natural history and response of neurologic syphilis to treatment, scrupulous follow-up and repeated cycles of therapy are warranted.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Cohort Studies; HIV Infections; Humans; Male; Middle Aged; Neurosyphilis; Penicillin G Benzathine; Recurrence; Syphilis

2006
[Rash and nephrotic syndrome: consider syphilis].
    Presse medicale (Paris, France : 1983), 2005, May-14, Volume: 34, Issue:9

    Kidney disease is among the clinical manifestations of secondary syphilis, as this case report shows.. During serologically confirmed secondary syphilis, a 63-year-old man developed a nephrotic syndrome diagnosed after biopsy as membranous nephropathy.. Membranous nephropathy is an immunological complication of secondary syphilis. Recovery usually follows treatment. It is often associated with signs that may erroneously suggest connective tissue disease.

    Topics: Adrenal Cortex Hormones; Biopsy; Ceftriaxone; Drug Therapy, Combination; Exanthema; Glomerulonephritis, Membranous; Humans; Kidney; Male; Middle Aged; Nephrotic Syndrome; Syphilis; Syphilis Serodiagnosis; Syphilis, Cutaneous

2005
Syphilitic uveitis in patients infected with human immunodeficiency virus.
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2005, Volume: 243, Issue:9

    This work investigates the incidence and clinical features of syphilitic uveitis in patients infected with human immunodeficiency virus (HIV).. We retrospectively reviewed syphilitic uveitis in patients coinfected with HIV that presented at a referral center between July 2001 and November 2003.. Twelve patients (20 eyes) were included. The ocular manifestations of syphilis led to the discovery of HIV-1 seropositivity in three patients. All patients were male and homosexual. One patient has been previously treated for syphilis with benzathine penicillin G. One patient presented with anterior uveitis and 11 patients had panuveitis or posterior uveitis. Necrotizing retinitis was noted in seven eyes (35%), posterior placoid chorioretinitis in six eyes (30%) and optic nerve involvement in five eyes (25%). Of nine patients with available cerebrospinal fluid (CSF) studies, seven (77.8%) had CSF abnormalities. Eleven patients were treated with intravenous penicillin G and one with intravenous ceftriaxone sodium. One patient required a second course of antibiotics to control uveitis. Ocular inflammation decreased and visual acuity improved in all nine patients for whom follow-up was available after treatment.. Manifestations of syphilitic uveitis in HIV-infected patients are multiple, with high frequencies of posterior uveitis, posterior placoid chorioretinitis, necrotizing retinitis and optic nerve involvement. Syphilitic uveitis in HIV-infected patients seems to have a more severe course and may relapse despite high-dose intravenous penicillin therapy.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Chorioretinitis; Eye Infections, Bacterial; Fluorescein Angiography; HIV Infections; Homosexuality; Humans; Incidence; Male; Middle Aged; Penicillin G; Retinal Necrosis Syndrome, Acute; Retrospective Studies; Risk Factors; Syphilis; Uveitis

2005
[Therapy of syphilis].
    Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete, 2004, Volume: 55, Issue:2

    Topics: Adult; Anti-Bacterial Agents; Azithromycin; Ceftriaxone; Controlled Clinical Trials as Topic; Doxycycline; Female; Follow-Up Studies; Humans; Male; Neurosyphilis; Penicillin G; Penicillin G Benzathine; Penicillin G Procaine; Penicillins; Practice Guidelines as Topic; Pregnancy; Probenecid; Prospective Studies; Syphilis; Syphilis Serodiagnosis; Time Factors; Uricosuric Agents

2004
[Syphilitic chorioretinitis in the immunocompromised patient: a case report].
    Journal francais d'ophtalmologie, 2004, Volume: 27, Issue:4

    Syphilitic chorioretinitis is a rare manifestation of secondary syphilis. The Authors report a case of a patient tested positive for human immune deficiency virus. A 26-Year-old man presented with a history of suddenly blurred vision in the right eye. Because of a central scotoma, visual acuity was reduced to counting fingers. Slit-lamp examination found one-plus anterior chamber cells and one-plus vitreous cells. Results of ophthalmoscopic examination showed a large yellow lesion in the macular area with a papillar edema and peripheral vasculitis. Serum and cerebrospinal fluid were positive for syphilitic serology. Visual acuity improved to 20/20 after three courses of intravenous ceftriaxone (2g/day for 15 days). The fundus lesion resolved almost completely, resulting in slight pigmentary changes in the macular area. This case report highlights the need for syphilitic serology in cases of uveitis in immunocompromised patients.

    Topics: Adult; Anti-Bacterial Agents; Ceftriaxone; Choroid Diseases; HIV Infections; Humans; Immunocompromised Host; Male; Retinal Diseases; Syphilis; Visual Acuity

2004
[Current syphilis therapies and serological control. Commentary on the article by M. Hartmann in Hautarzt, Volume 2 (2004)].
    Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete, 2004, Volume: 55, Issue:11

    Penicillin is currently the drug of choice for therapy of syphilis. Clemizole and procaine penicillin are no longer available. For this reason only benzathine penicillin and infusion therapy with benzyl penicillin are possible. Treatment with doxycyline or ceftriaxone is also conceivable. Suitable serological methods are necessary to control the safety of the therapy.

    Topics: Anti-Bacterial Agents; Ceftriaxone; Doxycycline; Female; Humans; Male; Patient Care Management; Penicillin G Benzathine; Syphilis; Syphilis Serodiagnosis; Treatment Outcome

2004
Treatment of syphilis 2001: nonpregnant adults.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2002, Oct-15, Volume: 35, Issue:Suppl 2

    After a precipitous increase in the incidence of infectious syphilis in the United States during the late 1980s and early 1990s, the rate of new cases has declined so dramatically that a program initiated by the Centers for Disease Control and Prevention (CDC) to achieve elimination appears to stand a good chance of succeeding. In the fall of 2000, the CDC convened an advisory group to examine the recent medical literature regarding syphilis treatment. Published literature in peer-reviewed journals and abstracts from relevant scientific meetings that have appeared since the last STD Treatment Guidelines meeting in 1997 were reviewed. Where applicable, unpublished data from studies in progress were also discussed. Expert opinion was sought. Through all these efforts, it appears that the azalide azithromycin and the third-generation cephalosporin ceftriaxone should find more definitive roles in the treatment of syphilis. None will eclipse the continued primacy of penicillin for this purpose.

    Topics: Adult; Anti-Bacterial Agents; Azithromycin; Ceftriaxone; Databases, Factual; Ethylenediamines; HIV Infections; Humans; Incidence; Neurosyphilis; Outcome Assessment, Health Care; Penicillins; Syphilis; United States

2002
Ceftriaxone therapy for syphilis: report from the emerging infections network.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 1999, Volume: 29, Issue:5

    Topics: Ceftriaxone; Cephalosporins; Humans; Syphilis

1999
The clinical diagnosis of genital ulcer disease in men.
    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 1997, Volume: 25, Issue:2

    We report the sensitivity and specificity of physical examination findings for diagnosing primary syphilis, chancroid, and genital herpes. The physical features of genital ulcers in 446 men were measured in accordance with a quantitative scale. Two hundred-twenty of these men had an established, single microbiological diagnosis. Forty-five (20%) had primary syphilis, 118 (54%) had chancroid, and 57 (26%) had genital herpes. There was considerable overlap in the clinical presentation of these three diseases. The classic clinical sign complex attributed to primary syphilis (painless, indurated, clean-based ulcers) was only 31% sensitive but 98% specific. The classic presentation of a chancroid ulcer (a deep, undermined, purulent ulcer) was only 34% sensitive but 94% specific. The classic description of genital herpes ulcers (multiple, shallow, tender ulcers) was only 35% sensitive but 94% specific. Inguinal lymph node findings did not contribute significantly to clinical diagnostic accuracy. These data indicate that the clinical diagnosis of genital ulcer disease can be made with reasonable certainty only for a minority of patients. Rapid, sensitive, and specific diagnostic tests for syphilis, chancroid, and genital herpes are needed.

    Topics: Adolescent; Adult; Aged; Ceftriaxone; Cephalosporins; Chancre; Chancroid; Genitalia, Male; Herpes Genitalis; Humans; Male; Middle Aged; Penicillin G; Penicillins; Predictive Value of Tests; Sensitivity and Specificity; Sexually Transmitted Diseases; Syphilis; Ulcer

1997
Incubating syphilis in patients treated for gonorrhea: a comparison of treatment regimens.
    The Journal of infectious diseases, 1994, Volume: 170, Issue:3

    Dade County sexually transmitted disease clinic records were reviewed to estimate the relative effectiveness of gonorrhea treatment regimens for eradicating incubating syphilis. Records were searched to see if persons treated for gonorrhea returned with primary syphilis 3-45 days after treatment or secondary syphilis 15-90 days after treatment. The number of persons treated was adjusted for the prevalence of syphilis in the year of treatment. Between 1985 and 1992, 98,441 persons were treated for gonorrhea. Syphilis was diagnosed in an interval that suggested it was incubating at the time of the treatment for 5.6/10(4) (adjusted number) persons treated with spectinomycin alone (a regimen not expected to eradicate syphilis); 2.9/10(4) persons treated with spectinomycin plus tetracycline, doxycycline, or erythromycin; and 2.1/10(4) persons treated with ceftriaxone plus tetracycline, doxycycline, or erythromycin (P > .1). Incubating syphilis was rare despite a syphilis epidemic. The effectiveness of a regimen for eradicating incubating syphilis should not be a major consideration when choosing gonorrhea therapy.

    Topics: Ceftriaxone; Doxycycline; Drug Therapy, Combination; Erythromycin; Florida; Follow-Up Studies; Gonorrhea; Humans; Incidence; Medical Records; Prevalence; Risk Factors; Syphilis; Tetracycline

1994
Early syphilis in Tennessee--1992.
    Journal of the Tennessee Medical Association, 1993, Volume: 86, Issue:11

    Topics: Ceftriaxone; Disease Outbreaks; Humans; Syphilis; Tennessee; Time Factors; Urban Health

1993
Incubating syphilis in an adolescent female rape victim.
    The Journal of adolescent health : official publication of the Society for Adolescent Medicine, 1991, Volume: 12, Issue:6

    The risk of infection after rape is believed to be low. The use of presumptive treatment is, therefore, controversial. Some experts recommend treatment of all patients, and others suggest treatment if the doctor suspects infection, if the patient requests it, if follow-up examination of the victim cannot be ensured, or if the assailant has a known infection. No regimen will cover all possible pathogens. The Centers for Disease Control's empiric regimen for victims of sexual assault is effective against gonorrhea, chlamydia, and, most likely, syphilis. We present a case of incubating syphilis following rape, that did not respond to ceftriaxone.

    Topics: Adolescent; Ceftriaxone; Female; Humans; Penicillin G Benzathine; Rape; Syphilis

1991
Ceftriaxone therapy for incubating and early syphilis.
    The Journal of infectious diseases, 1988, Volume: 158, Issue:4

    Topics: Adult; Ceftriaxone; Female; Follow-Up Studies; Humans; Male; Middle Aged; Syphilis

1988
Ceftriaxone given repeatedly cures manifest syphilis in the rabbit.
    Chemotherapy, 1987, Volume: 33, Issue:5

    Repeated intramuscular injection of ceftriaxone to rabbits with manifest syphilitic orchitis leads to clinical cure as does penicillin, given the serum levels reached are similar to the ones obtained clinically in man. Totally different to untreated controls the Treponema pallidum hemagglutination (TPHA) titers remain relatively low and later even tend to decrease further. Thus, it seems justified to start clinical trials on the definite role of ceftriaxone in the treatment of clinical syphilis.

    Topics: Animals; Ceftriaxone; Drug Administration Schedule; Injections, Intramuscular; Male; Orchitis; Penicillin G Benzathine; Rabbits; Syphilis

1987
Comparative in vitro susceptibility of Treponema pallidum to ceftizoxime, ceftriaxone and penicillin G.
    Chemotherapy, 1986, Volume: 32, Issue:4

    A procedure dating back to the early penicillin era is adapted in order to determine the activity of the new cephalosporins ceftizoxime and ceftriaxone against Treponema pallidum in vitro. While the well-known activity of penicillin G is confirmed for the virulent Nichols strain (0.002 micrograms/ml lead to 50% immobilisation) the new cephalosporins turn out to be almost as efficacious. The concentration of ceftizoxime leading to 50% inhibition amounts to 0.004 micrograms/ml. The corresponding figure for ceftriaxone is 0.01 micrograms/ml. The potential importance of these findings for the treatment of syphilis in man are discussed.

    Topics: Animals; Cefotaxime; Ceftizoxime; Ceftriaxone; Male; Microbial Sensitivity Tests; Penicillin G; Rabbits; Syphilis; Treponema pallidum

1986
Comparison of the activities of ceftriaxone and penicillin G against experimentally induced syphilis in rabbits.
    Antimicrobial agents and chemotherapy, 1982, Volume: 21, Issue:6

    The activity of ceftriaxone, a newly developed cephalosporin, against early cutaneous infections with Treponema pallidum in rabbits was compared with that of equimolar doses of penicillin G. Activity was related to the time required for cutaneous lesions to become dark-field negative, serological response, and the disappearance of T. pallidum from the popliteal lymph nodes. Both antibiotics were very effective in the treatment of syphilis in this animal model. The 50% curative dose for penicillin G was 0.8 mumol/kg (0.29 mg or 480 U/kg) and for ceftriaxone, it was 1.45 mumol/kg (0.96 mg/kg). Overall, ceftriaxone was slightly less effective than penicillin G was. Transmission and scanning electron microscopy studies of testicular aspirates obtained from rabbits treated with ceftriaxone revealed alterations in the treponeme surface which apparently resulted in changes in cell permeability and morphology.

    Topics: Animals; Antibody Formation; Cefotaxime; Ceftriaxone; Lymph Nodes; Male; Penicillin G; Rabbits; Syphilis; Treponema pallidum

1982