There may be high losses due to mortality with infection with bluetongue virus, especially in the more susceptible species such as white-tailed deer and sheep. However, indirect losses may be higher. Loss of body condition may cause substantial economic loss.
Losses can also occur due to aborted offspring, or the birth of weak or malformed lambs.
Erasmus, B.J. 1975. Bluetongue in sheep and goats. Australian Veterinary Journal.