colistin and Communicable-Diseases

Polymyxin B and colistin (polymyxin E) are bactericidal pentacationic lipopeptides that act specifically on Gram-negative bacteria, first by disrupting their outermost permeability barrier, the outer membrane (OM), and then damaging the cytoplasmic membrane. The discovery of both polymyxin B and colistin was published independently by three laboratories as early as in 1947. They were subsequently used in intravenous therapy. Unfortunately, they also exhibit significant and dose-limiting nephrotoxicity. Therefore, polymyxins were reserved as agents of last-line defense. The emergence of extremely multiresistant strains has now forced clinicians to reinstate polymyxins in the therapy of severe infections. However, the current dosage regimens lead to insufficient drug concentrations in serum and clinicians have been advised to use larger doses, which further increases the risk of nephrotoxicity. Very recently, the interest in developing better tolerated and more effective polymyxins has grown. This review focuses on describing four development programs that have yielded novel derivatives that are more effective than the old polymyxins in animal infection models. Compounds from three programs are superior to the old polymyxins in the rodent lung infection model with Acinetobacter baumannii and/or Pseudomonas aeruginosa. One of them is also more effective than polymyxin B in A. baumannii mouse thigh infection. The fourth program includes compounds that are approximately tenfold more effective in Escherichia coli murine pyelonephritis than polymyxin B.

Topics: Animals; Colistin; Communicable Diseases; Disease Models, Animal; Humans; Polymyxin B; Polymyxins; Treatment Outcome

The 68-year-old patient presented with fever, general malaise and physical weakness in neutropenia during a known relapse of acute myeloid leukaemia after allogeneic stem cell transplantation.. Due to immune suppression, an empiric antibiotic therapy with piperacillin/tazobactam was started. The 4MRGN screening was positive. For this reason, therapy was switched empirically to ceftazidime/avibactam plus colistin. A tongue ulcer with abscess formation and phlegmonous soft tissue reaction was revealed as the focus of the infection. Several microbiological probes including a blood culture discovered. Die Vorstellung der 68-jährigen Patientin erfolgte bei hohem Fieber, allgemeinem Unwohlseisn und körperlicher Schwäche in der Neutropenie bei Rezidiv einer akuten myeloischen Leukämie nach allogener Stammzelltransplantation.. Aufgrund der bestehenden Immundefizienz wurde eine kalkulierte antibiotische Therapie mit Piperacillin/Tazobactam begonnen. Bei positivem 4MRGN-Screening wurde diese kalkuliert auf Colistin und Ceftazidim/Avibactam umgestellt. Diagnostiziert wurde ein Zungenulkus mit Abszessbildung und phlegmonöser Weichteilreaktion. In mehreren mikrobiologischen Proben, inklusive einer Blutkultur, gelang der Nachweis eines. Vierfach multiresistente gramnegative Bakterien (4MRGN) sind aufgrund ihrer Resistenz gegenüber 4 bakterizid wirkenden Hauptantibiotikagruppen (Acylureidopenicilline, Cephalosporine der 3. Generation, Carbapeneme, Fluorchinolone) nur schwer therapierbar. Der vorliegende Fall zeigt für Cefiderocol eine gute klinische Wirksamkeit – auch bei Erregern, die gegen Antibiotika wie Colistin und Ceftazidim/Avibactam resistent sind und er verdeutlicht, wie wichtig eine antibiogrammgerechte Therapie ist.

Topics: Aged; Anti-Bacterial Agents; Azabicyclo Compounds; beta-Lactamases; Cefiderocol; Ceftazidime; Cephalosporins; Colistin; Communicable Diseases; Drug Combinations; Drug Resistance, Multiple, Bacterial; Gram-Negative Bacteria; Gram-Negative Bacterial Infections; Humans; Klebsiella pneumoniae; Microbial Sensitivity Tests; Neoplasm Recurrence, Local; Neutropenia

Carbapenem resistance among Acinetobacter species has become a life-threatening problem. As a last resort in the treatment of gram-negative bacteria infection, resistance to colistin is also a serious problem. The aim of study was to analyze the mechanism of resistance and perform genotyping of carbapenem-resistant Acinetobacter from clinical infection and fecal survey samples in Southern China.. One hundred seventy and 74 carbapenem-resistant Acinetobacter were isolated from clinical infection samples and fecal survey samples, respectively. We detected the related genes, including carbapenemase genes (bla. Among the 244 carbapenem-resistant Acinetobacter, the common carbapenemase-positive genes included the following: bla. The bla

Topics: Acinetobacter baumannii; Acinetobacter Infections; Anti-Bacterial Agents; Bacterial Proteins; beta-Lactamases; Carbapenems; China; Colistin; Communicable Diseases; Drug Resistance, Bacterial; Feces; Genetic Variation; Genotype; Humans; Integrons; Microbial Sensitivity Tests; Polymerase Chain Reaction; Sequence Analysis, DNA

Topics: Acute Kidney Injury; Aged; Anti-Bacterial Agents; Colistin; Communicable Diseases; Drug Administration Schedule; Drug Resistance, Multiple, Bacterial; Female; Humans; Kidney; Male; Middle Aged; Retrospective Studies; Treatment Outcome

Estimating the baseline antimicrobial consumption is extremely important to monitor the impact of antimicrobial stewardship activities that aim to reduce the burden and cost of antimicrobial consumption.. To quantify service-specific antimicrobial consumption using different metrics.. A surveillance study was conducted at King Abdulaziz Medical City, Riyadh, Saudi Arabia, between October 2012 and June 2015 in five adult intensive care units (ICUs). Consumption data were collected manually on a daily basis by infection control practitioners. Data were presented as defined daily dose (DDD), days of therapy (DOT) per 1000 patient days, and frequency of daily consumption.. A total of 43,970 DDDs and 46,940 DOTs were monitored during 54,116 patient-days. For the most frequently consumed antimicrobials, the consumption of carbapenems, piperacillin/tazobactam, vancomycin, and colistin (respectively) in all ICUs combined were 255.9, 134.3, 98.2, and 13.6 DDDs per 1000 patient-days and 235.7, 145.9, 129.5, and 117.5 DOTs per 1000 patient-days. For the frequency of daily consumption, carbapenems were the most frequently consumed antimicrobial group in medical/surgical, burn, and step-down ICUs while piperacillin/tazobactam was the most frequently consumed antimicrobial in neuro-surgical and cardio-thoracic ICUs.. High consumption of broad-spectrum antimicrobial agents such as meropenem and piperacillin/tazobactam is observed in multiple ICUs in a tertiary care hospital. Meropenem consumption is considerably higher than similar ICUs internationally. Future studies focusing on concurrent monitoring of antimicrobial resistance and identifying patient and physician characteristics associated with specific prescription patterns may help in improving judicious antimicrobial consumption.

Topics: Adult; Anti-Bacterial Agents; Antimicrobial Stewardship; Carbapenems; Colistin; Communicable Diseases; Cost-Benefit Analysis; Drug Utilization; Female; Humans; Intensive Care Units; Male; Meropenem; Middle Aged; Piperacillin, Tazobactam Drug Combination; Population Surveillance; Saudi Arabia; Tertiary Care Centers; Vancomycin; Young Adult

Topics: Colistin; Communicable Diseases; Drug Resistance, Bacterial; Escherichia coli; Gene Transfer, Horizontal; Humans; Klebsiella pneumoniae; Plasmids

Topics: Ampicillin; Colistin; Communicable Diseases; Humans; Infant, Newborn; Infant, Newborn, Diseases; Meningitis; Oxacillin; Pneumonia; Pseudomonas Infections; Pyoderma; Sepsis

Topics: Anti-Bacterial Agents; Colistin; Communicable Diseases; Drug Resistance, Microbial; Humans; Kanamycin; Sulfonamides

Topics: Colistin; Communicable Diseases; Conjunctiva; Cornea; Drug Therapy; Eye Diseases; Eyelids; Humans; Neomycin

Topics: Anti-Bacterial Agents; Colistin; Communicable Diseases; Escherichia coli Infections; Humans; Urinary Tract Infections