Maegga B T, Cupp E W
National Institute for Medical Research, Tukuyu Station, Tanzania.
Trop Med Parasitol. 1994 Jun;45(2):125-9.
Larvae of Simulium damnosum complex collected from rivers draining Tukuyu onchocerciasis focus were chromosomally examined. Of the 970 larvae analysed, 910 were identified as Kiwira form, a newly described cytotype found in all S. damnosum larval habitats in the Tukuyu area, while 51 were classified as a new subpopulation, tentatively named as Kasyabone form. The F1 larval progeny obtained from wild caught human biting S. damnosum and reared in the laboratory were chromosomally examined. 509 F1 larvae from 70 females blood fed on human volunteers were identified as Kiwira form. As the main human-biting member of the complex in the Tukuyu area, and because some of the wild caught females had developing filarial larvae indistinguishable from those of Onchocerca volvulus, Kiwira form is thus incriminated as the local vector of onchocerciasis. These observations are discussed with respect to previous literature.
对从图库尤盘尾丝虫病疫源地排水河流中采集的恶蚋复合体幼虫进行了染色体检查。在分析的970只幼虫中，910只被鉴定为基维拉型，这是在图库尤地区所有恶蚋幼虫栖息地发现的一种新描述的细胞型，而51只被归类为一个新的亚种群，暂命名为卡西亚博内型。对从野外捕获的叮咬人类的恶蚋中获得并在实验室饲养的F1幼虫后代进行了染色体检查。从70只以人类志愿者为食的雌性体内采集的509只F1幼虫被鉴定为基维拉型。作为图库尤地区该复合体中主要叮咬人类的成员，并且由于一些野外捕获的雌性体内发育中的丝虫幼虫与盘尾丝虫的幼虫无法区分开来，因此基维拉型被认定为当地盘尾丝虫病的传播媒介。结合先前的文献对这些观察结果进行了讨论。
