Читать книгу Farm Animal Medicine and Surgery - Graham R Duncanson - Страница 97

This disease is rare in the UK but seasonally common in East Africa. It is caused by a group of herpesviruses, which include Alcelaphine herpesvirus 1, Ovine herpesvirus 2 and Caprine herpesvirus 2. The most important is Alcelaphine herpesvirus 1 which is carried asymptomatically by the wildebeest (gnu) in East Africa. In the UK, the sheep is the asymptomatic carrier. Affected cattle will have a high fever and acute ocular discharge with corneal opacity and erosions causing a high mortality. Treatment is hopeless. Differentiation from bluetongue and mucosal disease may be difficult clinically. Diagnosis is either with an ELISA or a PCR. There is no vaccine available.