Detection of rift valley Fever virus interepidemic activity in some hotspot areas of kenya by sentinel animal surveillance, 2009-2012.

Autor: Lichoti JK; Ministry of Agriculture Livestock and Fisheries, P.O. Box 00625, Nairobi, Kenya., Kihara A; International Livestock Research Institute, P.O. Box 30709-00100, Old Naivasha Road, Nairobi, Kenya., Oriko AA; Kenya Agricultural Research Institute, Biotechnology Centre, P.O. Box 57811-00200, Waiyaki Way, Nairobi, Kenya., Okutoyi LA; Kenya Agricultural Research Institute, Biotechnology Centre, P.O. Box 57811-00200, Waiyaki Way, Nairobi, Kenya., Wauna JO; International Centre of Insect Physiology and Ecology, Human Health Division, P.O. Box 30772-00100, Nairobi, Kenya., Tchouassi DP; International Centre of Insect Physiology and Ecology, Human Health Division, P.O. Box 30772-00100, Nairobi, Kenya., Tigoi CC; International Centre of Insect Physiology and Ecology, Human Health Division, P.O. Box 30772-00100, Nairobi, Kenya., Kemp S; International Livestock Research Institute, P.O. Box 30709-00100, Old Naivasha Road, Nairobi, Kenya., Sang R; International Centre of Insect Physiology and Ecology, Human Health Division, P.O. Box 30772-00100, Nairobi, Kenya ; Kenya Medical Research Institute, Centre for Virus Research, P.O. Box 54628-00200, Nairobi, Kenya., Mbabu RM; Ministry of Agriculture Livestock and Fisheries, P.O. Box 00625, Nairobi, Kenya.
Jazyk: angličtina
Zdroj: Veterinary medicine international [Vet Med Int] 2014; Vol. 2014, pp. 379010. Date of Electronic Publication: 2014 Aug 13.
DOI: 10.1155/2014/379010
Abstrakt: Rift Valley fever virus causes an important zoonotic disease of humans and small ruminants in Eastern Africa and is spread primarily by a mosquito vector. In this region, it occurs as epizootics that typically occur at 5-15-year intervals associated with unusual rainfall events. It has hitherto been known that the virus is maintained between outbreaks in dormant eggs of the mosquito vector and this has formed the basis of understanding of the epidemiology and control strategies of the disease. We show here that seroconversion and sporadic acute disease do occur during the interepidemic periods (IEPs) in the absence of reported cases in livestock or humans. The finding indicates that previously undetected low-level virus transmission during the IEPs does occur and that epizootics may also be due to periodic expansion of mosquito vectors in the presence of both circulating virus and naïve animals.
Databáze: MEDLINE
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