Fig. 1From: Non-structural protein NS3/NS3a is required for propagation of bluetongue virus in Culicoides sonorensis Culicoides midge with the several different body parts; head, thorax and abdomen, indicated. Salivary glands (1) are located in the head/thorax. The digestive tract contains the forgut (2) and midgut (3), where food is digested and the hindgut (4), where faeces forms. Important dissemination barriers are located at the level of the midgut and salivary glands. Figure partly adapted from Alan R. Walker (Veterinary Research Laboratory, Kenya)Back to article page