Enzootic activity of Rift Valley fever virus in Senegal
Enzootic activity of Rift Valley fever virus in Senegal
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DOI：
10.4269/ajtmh.1997.56.265
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发表时间：
1997-03-01
影响因子：
3.3
通讯作者：
Digoutte, JP
中科院分区：
文献类型：
--
作者：
Zeller, HG;Fontenille, D;Digoutte, JP
1991年至1993年，在塞内加尔先前发现裂谷热病毒传播证据的两个地区，即萨赫勒生物气候区的巴克吉和苏丹-几内亚区的凯杜古，对裂谷热病毒的地方性维持进行了纵向研究。收集蚊子、白蛉和蜱虫，并通过血清学调查监测家养有蹄类动物。在Kedougou没有分离到裂谷热病毒。在Barkedji，裂谷热病毒是从骚扰伊蚊和Ae.在地面水池和牛群附近的陷阱中收集的赭色蚊，以及从一只健康的羊身上收集的赭色蚊。沙蝇不参与维护周期。在160只监测的绵羊和山羊中，有3只（1.9%）出现血清转化。动物间传播媒介在东非似乎属于新黑角伊蚊亚属，在西非似乎属于Aedimorphus亚属。东非的动物流行病与降雨量增加有关。然而，西非与兽疫有关的因素仍然未知。
In two areas of Senegal where previous evidence of Rift Valley fever (RVF) virus circulation was detected, Barkedji in the Sahelian bioclimatic zone and Kedougou in the Sudano-Guinean zone, a longitudinal study of the enzootic maintenance of RVF virus was undertaken from 1991 to 1993. Mosquitoes, sand flies, and ticks were collected and domestic ungulates were monitored with serologic surveys. Rift Valley fever virus was not isolated in Kedougou. In Barkedji, RVF virus was isolated from Aedes vexans and Ae. ochraceus mosquitoes collected in traps near ground pools and cattle droves and from one healthy sheep. Sand flies were not involved in the maintenance cycle. Seroconversions were recorded in three (1.9%) of 160 monitored sheep and goats. The interepizootic vectors appeared to belong to the Aedes subgenus Neomelaniconion in East Africa, and to the subgenus Aedimorphus in West Africa. Epizootics in East Africa are associated with an increase in rainfall. However, factors associated with epizootics remain unknown for West Africa.