| host-parasite relationship of trypanosoma corvi in ornithomyia avicularia. | the first description of an electron microscopic study of trypanosoma corvi in the vector ornithomyia avicularia is reported. there is a close association between vector and parasite in the midgut, ileum and rectum of the vector. the midgut distribution of parasites is determined by the peritrophic membrane, which confines the early infection to the endoperitrophic space. parasites escape from the ruptured region of the peritrophic membrane at the pylorus to gain access to the ectoperitrophic sp ... | 1989 | 2710770 |