曼氏血吸虫：巴西中间宿主软体动物的感染水平

[Schistosoma mansoni: the levels of infectivity for intermediate host mollusks in Brazil].

作者信息

de Souza C P, Jannotti-Passos L K, Belo de F Vieira I, Sampaio I B

机构信息

Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Universidade Federal de Minas Gerais, Belo Horizonte, MG.

出版信息

Rev Soc Bras Med Trop. 1996 Jan-Feb;29(1):11-6.

PMID:8851209

Abstract

The levels of infectivity of Schistosoma mansoni for the three species of Biomphalaria, intermediate hosts of parasite in Brazil were studied after exposing of molluscs to miracidia in the laboratory and in the field. The LE and SJ strains of S. mansoni, maintained in laboratory were used in these experiments as well as the WVS and RFS strains obtained from faeces of schoolchildren from Belo Horizonte, MG. The results show the high level of infectivity of S. mansoni for B. glabrata with infection rates varying from 4.7 to 85.5%. The snail B. straminea was susceptible to LE, SJ and WVS strains, with infection rates of 11.0 to 24.6%, B. tenagophila was susceptible only to LE and SJ strains with infection rates of 2.5 to 6.5%. The mean number of cercariae of the WVS strain shed per day, by B. straminea and B. glabrata were 93 +/- 59 and 782 +/- 1,120, respectively.

摘要

在实验室和野外将软体动物暴露于毛蚴后，研究了曼氏血吸虫对巴西寄生虫中间宿主三种双脐螺的感染性水平。在这些实验中使用了实验室保存的曼氏血吸虫LE和SJ株，以及从米纳斯吉拉斯州贝洛奥里藏特市学童粪便中获得的WVS和RFS株。结果显示，曼氏血吸虫对光滑双脐螺具有高感染性，感染率在4.7%至85.5%之间。条纹双脐螺对LE、SJ和WVS株敏感，感染率为11.0%至24.6%，嗜眼双脐螺仅对LE和SJ株敏感，感染率为2.5%至6.5%。条纹双脐螺和光滑双脐螺每天释放的WVS株尾蚴平均数量分别为93±59和782±1120。