Negm-Eldin M M
Department of Parasitology, Faculty of Veterinary Medicine, Zagazig University, Tukh, Moushtohour, Egypt.
Dtsch Tierarztl Wochenschr. 1997 Jun;104(6):215-9.
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.
从胡子鲶血液中分离出的穆氏锥虫在淡水水蛭三线蛭的肠道内经历了增殖发育。血流形式转化为短鞭毛虫，感染后2天，它们通过二分裂进行繁殖，产生大量短粗的上鞭毛体，这些上鞭毛体随后转化为球鞭毛体、无鞭毛体、前鞭毛体，更多地转化为长而细的上鞭毛体和循环后期锥鞭毛体。上鞭毛体和循环后期形式在水蛭体内持续存在超过21天。只有当水蛭再次进食时，循环后期形式才会在未感染的胡子鲶血液中发育成典型的小而细长的锥鞭毛体。随着时间的推移，细长的锥鞭毛体发育成中间形式，最终发育成大而宽的形式。对三线蛭的行为和生活史进行了详细研究，特别关注其活动以及卵、胚胎和未成熟水蛭的发育。
