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首页> 外文期刊>Journal of Rural and Remote Environmental Health >BIOECOLOGY OF SIMULIUM DAMNOSUM THEOBALD COMPLEX ALONG OSUN RIVER,SOUTHWEST NIGERIA
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BIOECOLOGY OF SIMULIUM DAMNOSUM THEOBALD COMPLEX ALONG OSUN RIVER,SOUTHWEST NIGERIA

机译：尼日利亚西南部奥孙河沿岸菊科植物蒂巴德络合物的生物生态学

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Objectives: A longitudinal study was carried out to investigate the adult population dynamics and the physical and chemical factors affecting the distribution of Simulium damnosum complex, a vector of onchocerciasis (River blindness) along Osun river in a forest zone of southwestern Nigeria. Methods: Adult flies were collected on consented human baits from 7.00am to 6.00pm every fortnight at three communities; Osun Eleja, Osun Ogbere and Osun Budepo along Osun River from February 2008 to June 2009. Larval prospection was carried out in all accessible rivers around the study area and their physical-chemical parameters were determined. Results: A total of 1472 flies were caught during the study period with Osun Budepo accounting for the highest number of the flies (47.0%) followed by Osun Eleja (42.2%) and Osun Ogbere (10.8%). The fly abundance was significantly higher (p<0.05, respectively for the three sites) during the wet season, with a positive correlation between rainfall and fly abundance at the three sites. S. damnosum s.l was found breeding only in the wet season at the rivers with rocky substratum and submerged vegetations. Water velocity (p=0.050) and dissolved oxygen (p=0.042) were the only parameters showing significance with the distribution of S. damnosum s.l larvae at the breeding sites. The adults of S. damnosum s.l were found biting at the rivers hitherto scored negative for preimaginal stages showing that the presence of larvae has limitation as sole factor in determining the extent of the distribution of S. damnosum complex. Conclusions: The results suggest that the climatic and environmental conditions influence the distribution of S. damnosum s.l in the study area. The presence of the fly all year round calls for adequate control measures to curtail the transmission of onchocerciasis in particular during the wet season
机译：目的：进行了一项纵向研究，以研究影响尼日利亚西南部森林地区沿奥孙河的盘尾丝虫病（河盲）病的Simulium damnosum复合物的分布的成年种群动态以及理化因素。方法：每两个星期从早上7.00点至下午6.00点，在三个社区中使用同意的人类诱饵收集成年蝇。 2008年2月至2009年6月，沿着Osun河的Osun Eleja，Osun Ogbere和Osun Budepo。在研究区域内所有可及的河流中进行了幼虫探矿，并确定了它们的理化参数。结果：在研究期间共捕获了1472只苍蝇，其中Osun Budepo占了最多的苍蝇（47.0％），其次是Osun Eleja（42.2％）和Osun Ogbere（10.8％）。在雨季，蝇的丰度显着较高（三个地点分别为p <0.05），这三个地点的降雨和蝇的丰度之间呈正相关。 damnosum s.l仅在潮湿季节在多岩石的底层和被淹没的植被的河流中繁殖。水速（p = 0.050）和溶解氧（p = 0.042）是唯一与繁殖地丹鼠链球菌幼虫幼虫分布有关的参数。迄今发现，在啮齿类动物的成虫之前，它们在咬嘴前的河流中被咬成阴性，这表明幼虫的存在是唯一的决定因素，它决定了damnosum s.l复杂分布的程度。结论：研究结果表明，气候和环境条件影响了该地区鼠尾草的分布。一年四季都有苍蝇，需要采取适当的控制措施以减少盘尾丝虫病的传播，特别是在雨季

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