Bluetongue is a viral disease primarily of sheep, but cattle, goats, camelids, wild or zoo ruminants, farmed cervids, and some carnivores are occasionally affected.  The virus is transmitted by midges in the genus Culicoides. The virus is endemic in a broad, worldwide band of tropical and subtropical regions; however, outbreaks also occur outside this area, and the virus may persist long-term if the climate and vectors are suitable.  


The Merck Veterinary Manual: Bluetongue

Center for Food Security & Public Health (CFSPH): Bluetongue

The Cattle Site: Bluetongue