克氏锥虫在骚扰锥猎蝽直肠内：饥饿媒介吸食血液的影响

Trypanosoma cruzi in the rectum of the bug Triatoma infestans: effects of blood ingestion by the starved vector.

作者信息

Kollien A H, Schaub G A

机构信息

Department of Special Zoology, Ruhr University, Bochum, Germany.

出版信息

Am J Trop Med Hyg. 1998 Jul;59(1):166-70. doi: 10.4269/ajtmh.1998.59.166.

DOI:10.4269/ajtmh.1998.59.166

PMID:9684647

Abstract

To follow the developmental effects of feeding of the insect host after long starvation periods, the population density and composition of an established infection of Trypanosoma cruzi in the rectum of Triatoma infestans were determined 60 days after the last feeding (daf) and then at different intervals after feeding. The original population decreased and then increased up to the 10th daf. In starved bugs, about 30% were spheromastigotes (including intermediate forms), 20% epimastigotes, and 50% trypomastigotes, but one daf, these forms represented 2%, 70%, and 10%, respectively. In addition, one daf there were about 10% giant cells, i.e., a multiple division stage. In the following two days, this form represented on average 30-50% of the total population, but it then disappeared nearly completely. Thus, giant cells evidently develop by rapid growth of epimastigotes, if conditions become optimal after long starvation periods of the vector.

摘要

为了追踪长时间饥饿后喂食昆虫宿主的发育影响，在最后一次喂食后60天（daf），然后在喂食后的不同时间间隔，测定了感染克氏锥虫的骚扰锥蝽直肠中已建立感染的种群密度和组成。原始种群数量先减少，然后在第10天daf前增加。在饥饿的虫子中，约30%为球鞭毛体（包括中间形态），20%为上鞭毛体，50%为锥鞭毛体，但在1天daf时，这些形态分别占2%、70%和10%。此外，在1天daf时，约有10%的巨细胞，即多分裂阶段。在接下来的两天里，这种形态平均占总种群的30 - 50%，但随后几乎完全消失。因此，如果在媒介长时间饥饿后条件变得适宜，巨细胞显然是由上鞭毛体的快速生长发育而来。