title: Trypanosoma Mukasai (HOARE, 1932) in its biological vector Batracobdelloides tricarinata (BLANCHARD, 1897) and their life cycles.
abstract: Trypanosoma mukasai from the blood of the fish Clarias lazera underwent a multiplicative development in the gut of the fresh water leech B. tricarinata. The blood stream forms transformed into short flagellates and 2 days post-infection, they divided by binary fission to produce numerous stumpy epimastigotes which later transformed into sphaeromastigotes, amastigotes, promastigotes and more numerous into long slender epimastigotes and metacyclic trypomastigotes. The epimastigotes and the metacyclic forms persisted in the leech for more than 21 days. The metacyclic forms developed into typical small slender trypomastigotes only in uninfected blood of Clarias lazera when the leech fed again. As time proceeded, the slender trypomastigotes developed into intermediate and finally into large broad form. The behaviour and the life history of the leech B tricarinata were studied in detail with special relevance to its activity and the development of eggs, embryos and immature leeches.
authors.affiliation: Department of Parasitology, Faculty of Veterinary Medicine, Zagazig University, Tukh, Moushtohour, Egypt.
authors.forename: M M
authors.initials: MM
authors.lastname: Negm-Eldin
mesh_terms: D000818:Animals; D004064:Digestive System / Q000469:parasitology; D004625:Embryo, Nonmammalian; D005260:Female; D005399:Fishes / Q000097:blood / Q000469:parasitology*; D007865:Leeches / Q000469:parasitology* / Q000502:physiology; D010058:Oviposition; D014345:Trypanosoma / Q000254:growth & development* / Q000302:isolation & purification