Full article is here: http://en.wikipedia.org/wiki/Bluetongue

Bluetongue disease (also called catarrhal fever) is a non-contagious, insect-borne viral disease of ruminants, mainly sheep and less frequently of cattle, goats, buffalo, deer, dromedaries and antelope. There are no reports of human transmission. It is caused by the Bluetongue virus.

African Horse Sickness is related to Bluetongue and is spread by the same midges (Culicoides species). It can kill up to 90% of the horses it infects.