pyrantel-pamoate and Helminthiasis

A case of acanthocephaliasis in an 18-month-old child caused by Macracanthorhynchus ingens is reported from Florida. This represents only the third documented case of this species in a human host. An overview of human cases of acanthocephaliasis in the literature is presented, along with a review of the biology, clinical manifestations and pathology in the human host, morphology, and diagnosis.

Topics: Acanthocephala; Animals; Anthelmintics; Feces; Female; Florida; Helminthiasis; Humans; Infant; Intestinal Diseases, Parasitic; Pyrantel Pamoate

Topics: Helminthiasis; Humans; Pyrantel; Pyrantel Pamoate

Existing anthelmintic drugs (eg, albendazole and mebendazole) have low efficacy against the intestinal nematode species Trichuris trichiura and the drug pipeline is exhausted. We aimed to investigate the strategy of combination chemotherapy with existing drugs to establish whether their efficacy could be enhanced and broadened.. In this randomised controlled trial, we compared three drug combinations and one standard drug alone in children aged 6-14 years in two schools on Pemba Island, Tanzania infected with T trichiura and concomitant intestinal nematodes. We assigned children, via a randomisation list with block sizes of either four or eight, to orally receive albendazole (400 mg) plus ivermectin (200 μg/kg); albendazole (400 mg) plus mebendazole (500 mg); albendazole (400 mg) plus oxantel pamoate (20 mg/kg); or mebendazole (500 mg) alone. The primary endpoints were the proportion of children cured of T trichiura infection and the reduction of T trichiura eggs in stool based on geometric means, both analysed by available case. This study is registered with ISRCTN, number ISRCTN80245406.. We randomly assigned 440 eligible children infected with T trichiura between Sept 2, and Oct 18, 2013, to one of the four treatment groups (110 children per group). Data for 431 children were included in the analysis for the primary endpoints. Albendazole plus oxantel pamoate (74 of 108 children cured [68·5%, 95% CI 59·6-77·4]; egg reduction 99·2%, 98·7-99·6) and albendazole plus ivermectin (30 of 109 cured [27·5%, 19·0-36·0]; egg reduction 94·5%, 91·7-96·3) were significantly more effective against T trichiura than mebendazole alone (nine of 107 cured [8·4%, 3·1-13·8]; egg reduction 58·5%, 45·2-70·9). Albendazole plus mebendazole had similar low efficacy (nine of 107 cured [8·4%, 3·1-13·8; egg reduction 51·6%, 35·0-65·3) to mebendazole alone. About a fifth of the children reported adverse events, which were mainly mild. Abdominal cramps and headache were the most common adverse events after treatment; abdominal cramps were reported by 13 (12·0%) children for albendazole plus ivermectin, 10 (9·3%) for albendazole plus mebendazole, 20 (18·2%) for albendazole plus oxantel pamoate, and 16 (14·5%) for mebendazole; headaches were reported by 5 (4·6%) children for albendazole plus ivermectin, 6 (5·6%) for albendazole plus mebendazole, 12 (10·9%) for albendazole plus oxantel pamoate, and 7 (6·4%) for mebendazole.. Our head-to-head comparison of three combination chemotherapies showed the highest efficacy for albendazole plus oxantel pamoate for the treatment of infection with T trichiura. Further studies should investigate the combination of albendazole plus oxantel pamoate so that it can be considered for soil-transmitted helminthiasis control programmes.. Medicor Foundation and Swiss National Science Foundation.

Topics: Administration, Oral; Adolescent; Albendazole; Animals; Anthelmintics; Child; Drug Therapy, Combination; Drug-Related Side Effects and Adverse Reactions; Feces; Female; Helminthiasis; Humans; Intestinal Diseases, Parasitic; Ivermectin; Male; Mebendazole; Parasite Egg Count; Pyrantel Pamoate; Tanzania; Treatment Outcome; Trichuriasis; Trichuris

Studies on a Thoroughbred breeding farm in Ohio were done to: (1) compare the effects of daily administration of pyrantel tartrate feed pellets with monthly administration of a pyrantel pamoate paste to yearling horses (21 January-3 September); (2) assess the effects of daily pyrantel tartrate given strategically in spring/summer to foaling mares (1 April-16 August) and given for a prolonged period to barren mares (21 January-3 September); (3) determine if strategic medication of foaling mares with daily pyrantel tartrate protected their foals until weaning. There were no differences in cyathostome egg counts, pasture larval counts, body condition scores, or body weights of yearlings treated with daily pyrantel tartrate or monthly pyrantel pamoate. Both treatments failed to maintain fecal egg counts of yearlings below 100 eggs per gram (epg), and mean counts exceeded 400 epg (pyrantel pamoate) and 700 epg (pyrantel tartrate) in August and September, resulting in a sharp, but moderate increase in pasture infectivity in October. By contrast, prolonged or strategic use of daily pyrantel tartrate in mature horses were each highly effective in reducing pasture contamination and infectivity with cyathostome eggs and larvae respectively. Strategic medication of foaling mares provided protection of their foals until weaning and first treatment of foals was delayed until after weaning when mean strongyle counts exceeded 100 epg. Treatment of weanlings with pyrantel pamoate had little effect on egg counts. A comparative anthelmintic study with ivermectin, oxibendazole, and pyrantel pamoate confirmed earlier studies showing reduced efficacy of anthelmintics in young horses.

Topics: Administration, Oral; Animals; Anthelmintics; Benzimidazoles; Drug Administration Schedule; Female; Helminthiasis; Helminthiasis, Animal; Horse Diseases; Horses; Ivermectin; Parasite Egg Count; Pyrantel Pamoate; Pyrantel Tartrate; Seasons

Tablets containing praziquantel, pyrantel embonate, and febantel were tested for efficacy against helminths in dogs. A single treatment with this drug combination gave 100% reductions in Toxocara canis and Taenia hydatigena in experimentally induced infections in dogs. In dogs with naturally acquired infections, treatment gave > 97 to 98% reductions in fecal egg counts attributable to Toxascaris leonina, T canis, and Uncinaria stenocephala. Efficacy against Trichuris vulpis was > 92%.

Topics: Animals; Anthelmintics; Dog Diseases; Dogs; Drug Combinations; Female; Guanidines; Helminthiasis; Helminthiasis, Animal; Male; Praziquantel; Pyrantel Pamoate

The effect of pyrantel pamoate, levamisole, mebendazole, thiabendazole and bephenium hydroxynaphthoate on various intestinal helminths were evaluated among the inhabitants of four villages in the Dezful area southwest of Iran. A total number of 328 persons, all infected simultaneously with Ascaris and hookworm (Ancylostoma duodenale) and 49.2% with Trichostrongylus spp., were randomly divided into six groups. One group was kept as the control and the other five were each treated with one compound. Follow-up examinations showed that all of the drugs used were highly effective on Ascaris, and the differences in the cure rate were not statistically significant except for bephenium hydroxynaphthoate which showed a lower cure rate. For hookworm, cure rates of 100, 90, and 85% were observed with levamisole, pyrantel pamoate and bephenium hydroxynaphthoate, respectively. Cure rates observed with mebendazole and thiabendazole were 35 and 51%, respectively. For Trichostrongylus, the highest cure rate was achieved with levamisole, followed by thiabendazole and mebendazole. While the percentage of people showing side-effects was rather low for all drugs, thiabendazole and bephenium hydroxynaphthoate produced a higher, and levamisole a lower, percentage of side effects.

Topics: Adolescent; Adult; Ancylostomiasis; Anthelmintics; Ascariasis; Bephenium Compounds; Child; Child, Preschool; Clinical Trials as Topic; Drug Evaluation; Feces; Follow-Up Studies; Helminthiasis; Humans; Infant; Intestinal Diseases, Parasitic; Iran; Levamisole; Mebendazole; Parasite Egg Count; Pyrantel Pamoate; Thiabendazole; Trichostrongylosis

Topics: Albendazole; Animals; Anthelmintics; Female; Helminthiasis; Humans; Intestinal Diseases, Parasitic; Ivermectin; Male; Mebendazole; Pyrantel Pamoate; Trichuriasis

Topics: Animals; Anthelmintics; Feces; Female; Florida; Helminthiasis; Humans; Infant; Intestinal Diseases, Parasitic; Mebendazole; Microscopy; Moniliformis; Parasitology; Pyrantel Pamoate; Treatment Outcome

A survey of intestinal parasites was conducted on 198 foreign workers aged 19-27 from Inodonesia and Philippines. They work for a private company in Ishikawa Prefecture as technical trainee. On the base of stool examination, 94 (71%) out of 133 Indonesians and 48 (74%) of 65 Filipinos had intestinal helminths and/or protozoan infections. The prevalence of Ascaris lumbricoides, Trichuris trichura and Hookworm was 4.5, 64.1, 10.6%, respectively. In addition, the positive rate of the cyst of Entamoeba coli, Endolimax nana, Blastocystis hominis and Giardia lumblia was 11.1, 5.6, 4.5 and 2.0%, respectively. No E. histolytica was found; however, counter current immunoelectrophoresis revealed that one out of 112 sera possessed the antibody against the antigen of HK-9 strain of E. histolytica. Sixty-three cases of trichuriasis were treated with mebendazole at a dose of 200 mg/day x 3 consecutive days. Re-examination revealed that 53 (85.5%) of them were cured.

Topics: Adult; Helminthiasis; Humans; Indonesia; Intestinal Diseases, Parasitic; Japan; Mebendazole; Philippines; Prevalence; Protozoan Infections; Pyrantel Pamoate

Ten controlled tests were done between 1972 and 1989, in lambs on pasture, evaluating activity of fenbendazole (FBZ; 5 mg/kg of body weight), oxfendazole (OFZ; 3.5 and 10 mg/kg), oxibendazole (OBZ; 10 mg/kg), pyrantel pamoate (PRT; 25 mg of base/kg), and thiabendazole (TBZ; 44 and 50 mg/kg) against natural infections of helminths, with emphasis on 2 strains (A and B) of Haemonchus contortus. Strain A was phenothiazine-susceptible and strain B was phenothiazine-resistant when isolated in 1955. For approximately 10 years prior to these tests, sheep infected with both strains had been treated periodically each year with several compounds, including thiabendazole, which was used many more times than the other drugs. For this study, 4 (FBZ, OFZ, OBZ, and PRT) of the 5 compounds were evaluated in either 1 or 2 controlled tests. The fifth compound, TBZ, was used for 5 tests. Strain A H contortus was resistant to TBZ for all years tested, but more susceptible to FBZ, OFZ, OBZ, and PRT. Overall, strain B was susceptible to TBZ (with a few exceptions), and also to FBZ, OFZ, OBZ (activity less on immature forms), and PRT. Other abomasal parasites (2 species of Ostertagia and 3 of Trichostrongylus) were found in low numbers, but removal overall was good for the compounds tested. Trichostrongylus axei, found in higher numbers than species of Ostertagia and other species of Trichostrongylus, were effectively removed by all compounds in most cases. Activities of TBZ and PRT were also evaluated against several species of intestinal helminths, most of which were found in low numbers. Cooperia curticei were inconsistently removed by TBZ, but activity of PRT was effective.(ABSTRACT TRUNCATED AT 250 WORDS)

Topics: Animals; Anthelmintics; Benzimidazoles; Drug Resistance; Feces; Fenbendazole; Haemonchiasis; Haemonchus; Helminthiasis; Helminthiasis, Animal; Parasite Egg Count; Phenothiazines; Pyrantel Pamoate; Sheep; Sheep Diseases; Thiabendazole

Three anthelmintic pastes were compared in terms of their ability to suppress the output of parasite eggs in the faeces of 108 grazing horses at four sites in Britain; the horses were treated once with either ivermectin, fenbendazole or pyrantel. At each site, the horses grazed together throughout the trials which took place during the summers of 1985 and 1986. The median periods before parasite eggs reappeared in faeces were 70 days for ivermectin, 14 days for fenbendazole and 39 days for pyrantel embonate. Geometric mean faecal egg counts in the groups treated with ivermectin and pyrantel were significantly less (P less than 0.05) than in the fenbendazole group on days 21, 28, 35 and 42 after treatment. On days 49, 56, 63 and 70 the mean egg counts in the ivermectin group were significantly lower (P less than 0.05) than those in either of the other groups. The results indicated that in order to ensure minimal contamination of pastures, grazing horses treated with ivermectin paste would have required a second treatment approximately 10 weeks after the first, and to achieve similar control with fenbendazole or pyrantel embonate, a second treatment would have been required after approximately two weeks and six weeks, respectively.

Topics: Animals; Benzimidazoles; Feces; Female; Fenbendazole; Helminthiasis; Helminthiasis, Animal; Horse Diseases; Horses; Ivermectin; Male; Parasite Egg Count; Pyrantel; Pyrantel Pamoate; Random Allocation; Recurrence; Statistics as Topic; Time Factors

An acanthocephalan infection in a 15-month-old male in Pensacola, FL was successfully treated with pyrantel pamoate. He was not overtly ill.

Topics: Animals; Florida; Helminthiasis; Humans; Infant; Male; Moniliformis; Pyrantel Pamoate

Experiments were carried out to define the haematological changes taking place during the first six weeks of a primary infection with Nematospiroides dubius. The general pattern of changes was observed to comprise a rapid increase in circulating leucocytes (4 to 5-fold increase) which consisted of a neutropl a, lymphocytosis, monocytosis and an eosinophilia. However, in strong responder NIH mice leucocyte counts returned to normal more rapidly than in other strains (by day 28). In contrast, in weak responder C57BL/10 mice the leucocyte counts whilst falling significantly relative to day 7 did not return to normal within the experimental period. Mice infected with irradiated larvae did not experience as high a leucocytosis as did mice given an identical number of normal larvae. The peak lymphocytosis, neutrophilia and monocytosis were all lower. The removal of adult worms from infected animals by treatment with pyrantel on days 9, 11, 13 and 16, also significantly altered the pattern of leucocytosis. The neutrophilia which was evident on day 7 returned rapidly to normal, whereas in mice which had retained their worms a peak neutrophilia was observed on day 14. These haematological changes were discussed and related to the failure of host-protective immunity to operate effectively during the early stages of a primary infection with N. dubius.

Topics: Animals; Helminthiasis; Helminths; Host-Parasite Interactions; Larva; Leukocyte Count; Leukocytes; Leukocytosis; Mice; Mice, Inbred Strains; Pyrantel Pamoate; Time Factors

Topics: Anthelmintics; Bithionol; Cestode Infections; Diethylcarbamazine; Helminthiasis; Humans; Mebendazole; Nematode Infections; Niclosamide; Niridazole; Oxamniquine; Piperazines; Praziquantel; Pyrantel Pamoate; Pyrvinium Compounds; Suramin; Thiabendazole; Trichlorfon

The survey on soil-transmitted helminthiasis was carried out in the three villages of Asahan Regency, North Sumatra, Indonesia, between October 1981 and December 1982. The prevalence rates of geohelminthiasis proved to be extremely high (average 97%) in the three villages and more than 70% harboured three or more helminths, especially Ascaris lumbricoides, Trichuris trichiura and hookworm. Necator americanus and Ancylostoma duodenale were detected in 61.1% and 52.2% of 835 fecal specimens, respectively. The effects of two anthelmintics, Combantrin and Trivexan, were essentially the same against A. lumbricoides and hookworm, although Trivexan was better than Combantrin against T. trichiura. The kinetic changes of parasitic infection in community after mass treatment were examined. Ten months after the first drug treatment, the incidence of Ascariasis or trichuriasis reverted nearly to pre-treatment level, while hookworm infection rate remained significantly low. Four months after the second mass treatment, the reinfection rate of A. lumbricoides was most prevalent followed by trichuriasis and hookworm infection. The reinfection rate (63.6%) of A. lumbricoides in children was about six times higher than that (10.4%) in adults at four month after the mass treatment. This study indicates that mass treatment with Trivexan at two month intervals for children and four month intervals for adults is necessary for the effective helminth control scheme in highly endemic areas of North Sumatra.

Topics: Adolescent; Adult; Child; Child, Preschool; Drug Combinations; Female; Helminthiasis; Hemoglobins; Humans; Indonesia; Infant; Infant, Newborn; Male; Mebendazole; Pyrantel Pamoate; Recurrence; Soil

Topics: Adolescent; Anthelmintics; Child; Evaluation Studies as Topic; Female; Helminthiasis; Humans; Intestinal Diseases; Malaysia; Male; Protozoan Infections; Pyrantel; Pyrantel Pamoate; Schools; Sex Factors

A survey was carried out in three orphanages in Jakarta for intestinal helminthic infections. Stool samples and anal swabs of 158 children were examined. The prevalences of intestinal helminthic infections in the Putra Utama, Muslimin and Van der Steur orphanages were respectively as follows: a lumbricoides 70.0%, 76.6% and 50.8%, T. trichiura 78.0% 93.6% and 70.5%, hookworm 20.0%, 12.7% and 3.2% and E. vermicularis 34.0% 29.8%, 59.0%. Treatment with Trivexan (100 mg of pyrantel pamoate and 150 mg of mebendazole), one tablet as a single daily dose for 3 consecutive days resulted in cure rates for A. lumbricoides 96.0%, 100% for T. trichiura 78.0%, 80.9% and 86.9% for hookworm 98.0%, 100% and 100% and for E. vermicularis 82.3% 92.9% and 97.2%. No side effects were observed, except in one child who complained of nausea.

Topics: Adolescent; Child; Child, Institutionalized; Child, Preschool; Drug Combinations; Female; Helminthiasis; Humans; Indonesia; Intestinal Diseases, Parasitic; Male; Mebendazole; Pyrantel Pamoate

Topics: Adult; Child; Helminthiasis; Humans; Mebendazole; Pyrantel Pamoate; Thiabendazole

Topics: Helminthiasis; Hookworm Infections; Humans; Male; Military Medicine; Nepal; Pyrantel; Pyrantel Pamoate

Pyrantel pamoate at dosage of 10 mg per kilogramme body weight was given to each villager at 4-6 weeks intervals for three times. The infection rates of hookworms among those who received and did not received the drug decreased from 60.5% pre-treatment to 19.6% after the third treatment and then increased to 32.4% one year after the third treatment. Infection rates of A. lumbricoides and Strongyloides spp. among the villagers who received and did not received the drug decreased from 27.5% pre-treatment to 2.2% after the third treatment and then increased to 20.1% one year later for the former, while the latter decreased from 6.5% pre-treatment to 2.3% after the third treatment and 0.4% one year later. The infection rate of T. trichiura was found to increase as pyrantel pamoate had no effect on this nematode. The authors suggested that to obtain more satisfactory results the anthelmintic drug used must likewise be effective against T. trichiura particularly in areas where this nematode is a public health problem. It was also suggested that the duration of treatment should be prolonged.

Topics: Adolescent; Adult; Aged; Ascariasis; Child; Child, Preschool; Female; Helminthiasis; Humans; Infant; Male; Middle Aged; Parasite Egg Count; Pyrantel; Pyrantel Pamoate; Soil Microbiology; Strongyloidiasis; Trichuriasis

Topics: Anthelmintics; Helminthiasis; Humans; Pyrantel Pamoate

Topics: Child, Preschool; Female; Helminthiasis; Humans; Intestinal Diseases, Parasitic; Male; Pyrantel; Pyrantel Pamoate; Taiwan

Topics: Animals; Dog Diseases; Dogs; Helminthiasis; Helminthiasis, Animal; Pyrantel; Pyrantel Pamoate; Wisconsin

Topics: Adult; Africa, Western; Animals; Ascaridiasis; Cats; Dogs; Feces; Female; Helminthiasis; Hookworm Infections; Humans; Male; Necator; Pyrantel; Pyrantel Pamoate; Rats; Schistosomiasis; Strongyloidiasis

Topics: Administration, Oral; Adolescent; Adult; Aged; Ascariasis; Child; Child, Preschool; Feces; Female; Helminthiasis; Humans; Infant; Intestinal Diseases, Parasitic; Liver Diseases, Parasitic; Male; Middle Aged; Models, Biological; Philippines; Protozoan Infections; Pyrantel Pamoate

Topics: Anthelmintics; Bephenium Compounds; Child; Citrates; Helminthiasis; Humans; Naphthols; Nigeria; Piperazines; Pyrantel; Pyrantel Pamoate