title: Development of Thelastoma bulhoesi (Oxyurata: Thelastomatida) and the Effect of Thiabendazole on the Unembryonated Egg.
abstract: The embryological and postembryological development of Thelastoma bulhoesi was determined. Initial cleavage was into unequal cells and occurred within 1-2 hours at 25 C. Cell division was holoblastic but no true morula is formed. Gastrulation occurred at approximately 48 hours by epibolic synectic mechanisms. First-stage larvae were fully developed at 96 hours. The molt to second-stage larvae was initiated in the egg and was completed at hatching. Second-stage larvae were first observed in the host at 11 hours postinfection, third-stage larvae at 18 hours, and fourth-stage larvae at 192 hours. Adult female worms were observed at 32 days. Thiabendazole, in even the lowest concentrations, inhibited the developmem of unembryonated ova.
authors.forename: G L
authors.initials: GL
authors.lastname: McCallister
authors.forename: G D
authors.initials: GD
authors.lastname: Schmidt