Bockarie M J, Davies J B
Department of Medical Entomology, Liverpool School of Tropical Medicine, U.K.
Ann Trop Med Parasitol. 1990 Dec;84(6):599-605. doi: 10.1080/00034983.1990.11812515.
In the first of these papers we reported on the biting-densities of Simulium damnosum s.l., vector of onchocerciasis, at sites in and near to a village in the forest area of Sierra Leone that was well separated from any large Simulium breeding river. It was found that biting-densities and transmission levels were higher in open farmland than at riverside sites. In this paper we examine the relative time spent by the villagers at the same five sites in and near to the village of Baoma Lungibu, and compare the time spent and activity, with known Simulium biting-densities and transmission indices. It is concluded that, in this situation, the highest risk of infection with onchocerciasis was to persons of either sex in the 20-39 age group who were engaged in farming, or travelling through open farmland, during the months of June to August at the beginning of the wet season. Activities in and close to the village, even by the riverside, where shade cover was heavy, presented little risk of infection.
在这些论文的第一篇中，我们报告了盘尾丝虫病媒介——恶蚋复合组（Simulium damnosum s.l.）在塞拉利昂森林地区一个村庄及其附近地点的叮咬密度，该村庄与任何大型恶蚋繁殖河流相隔甚远。研究发现，开阔农田中的叮咬密度和传播水平高于河边地点。在本文中，我们考察了村民在包马隆吉布村及其附近相同五个地点所花费的相对时间，并将所花费的时间和活动与已知的恶蚋叮咬密度及传播指数进行比较。得出的结论是，在这种情况下，盘尾丝虫病感染风险最高的是20至39岁的从事农业活动或在雨季开始的6月至8月期间穿越开阔农田的男女村民。即使在河边，村庄内及周边的活动，由于树荫茂密，感染风险也很小。
