an acute, respiratory viral disease of horses, characterized by degenerative and inflammatory changes in the small arteries; the main symptoms are fever, respiratory difficulty, oedema of the legs, diarrhoea, and in pregnant mares, abortion
... in the case of viral arteritis, male equidae must - notwithstanding Article 19 (ii) - have reacted negatively to a serological test or to a virus isolation test or to any other test recognized in accordance with the procedure laid down in Article 24 which would guarantee freedom from the virus.
