Chingwena G, Mukaratirwa S, Kristensen T K, Chimbari M
University of Zimbabwe, Department of Paraclinical Veterinary Studies, Box MP 167, Harare, Zimbabwe.
J Helminthol. 2002 Dec;76(4):283-93. doi: 10.1079/JOH2002132.
Between November 1998 and October 2000, freshwater snails were collected monthly from the highveld and lowveld areas of Zimbabwe to determine the occurrence of larval trematodes. A total of 13,789 snails, representing ten species, were collected from 21 sites and 916 (6.6%) harboured patent trematode infections. Eight morphologically distinguishable types of cercariae were identified. Bulinus tropicus had the highest overall prevalence of infection (13.1%). The echinostome was the most common type of cercaria recovered, contributing 38.2% of all infections. Schistosoma cercariae were recovered mainly from the highveld and comprised 8.0% of all infections. Amphistome cercariae contributed 37.6% of all infections and were recorded from both the highveld and lowveld areas with a peak prevalence occurring during the post-rainy period (March-May). The main intermediate host for amphistomes was B. tropicus. Infections in B. globosus, B. forskalii and Biomphalaria pfeifferi with amphistome cercariae are new records for Zimbabwe.
1998年11月至2000年10月期间，每月从津巴布韦的高草原和低草原地区采集淡水蜗牛，以确定幼虫期吸虫的出现情况。从21个地点共采集了13789只蜗牛，分属10个物种，其中916只（6.6%）携带明显的吸虫感染。鉴定出8种形态上可区分的尾蚴类型。热带泡螺的总体感染率最高（13.1%）。棘口吸虫是最常见的尾蚴类型，占所有感染的38.2%。血吸虫尾蚴主要从高草原地区采集到，占所有感染的8.0%。双口吸虫尾蚴占所有感染的37.6%，在高草原和低草原地区均有记录，在雨后时期（3月至5月）感染率达到峰值。双口吸虫的主要中间宿主是热带泡螺。球形泡螺、福氏泡螺和费氏双脐螺感染双口吸虫尾蚴在津巴布韦属首次记录。
