Gbakima A A, White P T, Bockarie A, Komba-Kono G
Department of Biological Sciences, Njala University College, Freetown.
Trop Geogr Med. 1989 Jul;41(3):201-7.
Infection due to Onchocerca volvulus was investigated in the Nimiyama Chiefdom, Kono District, Sierra Leone, where Simulium damnosum s.l. is known to breed but no data on the prevalence and intensity of O. volvulus infection exists. Of the 735 individuals sampled by the skin snip method in five villages, 471 (64%) were infected. The infection rate for males was significantly (p less than 0.05) higher than that of the females. Two hundred and ninety-one (70.0%) of the 416 males skin snipped and 180 (56.0%) of the 323 of their female cohorts were infected. The intensity of infection increased with age, with the younger cohorts presenting lower microfilarial density (MFD). Palpable nodules were observed in 230 (48.4%) of individuals found positive for skin microfilariae and in 37 (5.0%) individuals found negative for skin microfilariae. It is concluded that O. volvulus infection is mesoendemic in the Nimiyama Chiefdom, with the intensity of infection increasing with age.
在塞拉利昂科诺区的尼米亚马酋长国，对因盘尾丝虫感染的情况进行了调查。该地已知有大量的恶蚋繁殖，但尚无盘尾丝虫感染率及感染强度的数据。在五个村庄通过皮肤切取法采集的735人中，有471人（64%）受到感染。男性的感染率显著高于女性（p < 0.05）。在接受皮肤切取检查的416名男性中，有291人（70.0%）受到感染，在其323名女性同组人群中有180人（56.0%）受到感染。感染强度随年龄增长而增加，年龄较小的组微丝蚴密度（MFD）较低。在皮肤微丝蚴检测呈阳性的个体中有230人（48.4%）可摸到结节，在皮肤微丝蚴检测呈阴性的个体中有37人（5.0%）可摸到结节。得出的结论是，在尼米亚马酋长国盘尾丝虫感染呈中度流行，感染强度随年龄增长而增加。
