[Helminths detected in some laboratory animals by fecal examinations.]

Fecal specimens obtained from 505 rats, 317 mice, 128 rabbits and 52 guinea pigs were examined for helminth infections. In general, 38.02% of rats and 83.59% of mice were infected with one or more helminth species. The percentage of Syphacia muris and Syphacia obvelata were 32.48% and 12.67%, respectively, in rats, and the percentage of Aspiculuris tetraptera, S. obvelata and Hymenolepis nana were 79.18%, 10.72% and 15.45%, respectively, in mice. Passalurus ambiguus was found only in one rabbit (0.78 %). No helminth infections were detected in guinea pigs.