HISTOPATHOLOGICAL STUDIES OF THE NATURAL FORM OF THE PARVOVIRUS DISEASE OF THE MUSCOVY DUCK (CAIRINA-MOSCATA) - DIFFERENTIAL-DIAGNOSIS WITHREOVIRUS INFECTION

Histological lesions of the natural form of the Parvovirus infections of the Muscovy duck, a new viral disease which broke out in 1989, were described in detail. The disease was characterized by a subacute nevr itis, a non suppurative poliencephalomyelitis, a fascicular degenerati ve myopathy, a myocarditis and an interstitial hepatitis. The lesions were concurrently observed in one or, more often, in several ducks of the infected flock. The required conditions to improve the specificity of the histological diagnosis are presented and the histological crit erions of the differential diagnosis between Parvovirus and Reovirus i nfections are emphazised.