title: Growth of Enterobius vermicularis in a chimpanzee after anthelmintic treatment.
abstract: The growth of Enterobius vermicularis in a chimpanzee was investigated by observing worms discharged in feces after administration of pyrantel pamoate. Just after the final molting, immature adult male pinworms developed to a fully mature stage in 2 wk, after passing through a stage corresponding to the so-called Enterobius gregorii, which was surmised to be a younger adult form of E. vermicularis. The frequency distribution of body length forms 2 peaks in both male and female pinworms, with a depression in the transitional forms from the immature to the fully mature stage. This depression seems to be the result of more rapid growth or lower susceptibility to the drug in this transitional stage. Pyrantel pamoate effectively eradicated mature males, but gravid females were continuously observed in the feces after treatment. The complete eradication of pinworm infection by pyrantel pamoate could be achieved by repeated treatment at intervals shorter than 2 wk. This treatment would eradicate male worms first, resulting in females producing only unfertilized eggs, from which only males might hatch.
authors.affiliation: Department of Infectious Diseases, Oita Medical University, Hasama, Oita 879-5593, Japan.
authors.forename: Tadao
authors.initials: T
authors.lastname: Nakano
authors.forename: Koichi
authors.initials: K
authors.lastname: Murata
authors.forename: Yatsukaho
authors.initials: Y
authors.lastname: Ikeda
authors.forename: Hideo
authors.initials: H
authors.lastname: Hasegawa
mesh_terms: D000818:Animals; D000836:Animals, Zoo; D000969:Antinematodal Agents / Q000494:pharmacology / Q000627:therapeutic use*; D018420:Ape Diseases / Q000188:drug therapy* / Q000469:parasitology; D017229:Enterobiasis / Q000188:drug therapy / Q000469:parasitology / Q000662:veterinary*; D004757:Enterobius / Q000033:anatomy & histology / Q000187:drug effects / Q000254:growth & development*; D005243:Feces / Q000469:parasitology; D005260:Female; D008297:Male; D002679:Pan troglodytes / Q000469:parasitology*; D011716:Pyrantel Pamoate / Q000494:pharmacology / Q000627:therapeutic use*; D012727:Sex Characteristics; D012744:Sex Ratio
chemical_list: D000969:Antinematodal Agents; D011716:Pyrantel Pamoate