Zeller H G, Fontenille D, Traore-Lamizana M, Thiongane Y, Digoutte J P
Laboratoire des Arbovirus, Institut Pasteur, Dakar, Senegal.
Am J Trop Med Hyg. 1997 Mar;56(3):265-72. doi: 10.4269/ajtmh.1997.56.265.
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 health 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.
在塞内加尔曾检测到裂谷热（RVF）病毒传播迹象的两个地区，即萨赫勒生物气候区的巴尔克吉和苏丹-几内亚区的凯杜古，于1991年至1993年开展了一项关于裂谷热病毒动物疫源地维持情况的纵向研究。收集了蚊子、白蛉和蜱，并通过血清学调查对家养有蹄类动物进行监测。在凯杜古未分离到裂谷热病毒。在巴尔克吉，从在地面水池和畜群附近陷阱中捕获的骚扰伊蚊和 Ochraceus伊蚊以及一只健康绵羊中分离到了裂谷热病毒。白蛉未参与病毒维持循环。在160只监测的绵羊和山羊中，有3只（1.9%）出现了血清转化。东非动物间流行的传播媒介似乎属于新黑蚊亚属，而西非的则属于伊蚊形态亚属。东非的动物流行病与降雨增加有关。然而，西非与动物流行病相关的因素仍然未知。
