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OJVRTM

 

Online Journal of Veterinary Research©

(Including Medical and Laboratory Research)

Established 1994

ISSN 1328-925X

 

Volume 29 (3): 152-159,  2025.

Case study: clinical pathology of cormorants with avian paramyxovirus-1

K Singh1, Jennifer Nevis2, P. Roady1, S. Corner1, K. Szilagyi1

 

1Veterinary Diagnostic Laboratory, University of Illinois, Urbana-Champaign, 2Willowbrook Wildlife Center, Glen Ellyn, IL, USA.

 

 

 

ABSTRACT

 

Singh K, Nevis J, Roady P, Corner S, K. Szilagyi, Case study: clinical pathology of cormorants with avian paramyxovirus-1, Onl J Vet Res, 29 (3): 152-159, 2025. Six young cormorants (Phalacrocorax sp.) presented with difficult swallowing, head shaking, visual deficits, bilateral limb, wing paralysis and inability to rise.  Gross necropsy of one revealed poor nutritional status with prominent keel bone, severe atrophy of pectoral muscles and depletion of adipose tissue stores. Cerebellar edema, splenomegaly, and nematodes in the ventriculus were also observed grossly. Histologically, necrotizing mesobronchitis and parabronchitis with epithelial regeneration, chronic lymphoplasmacytic and histiocytic meningoencephalitis, mild chronic lymphoplasmacytic interstitial nephritis, lymphoplasmacytic and granulomatous proventriculitis, and chronic enteric hemorrhages were observed.  An incidental finding included the presence of nematodes within the areas of granulomatous proventriculitis. Newcastle disease virus (Avian paramyxovirus type I) was identified in the brain samples using RT-PCR. General public, hunters, and other professionals should avoid contact with the birds suffering from Newcastle disease because of zoonotic implication.  The clinical signs in humans include fever, ocular discharge, and respiratory symptoms.

 

Keywords: Avian paramyxovirus; bronchitis; cormorants; ducks; meningoencephalitis; neurologic disease; Newcastle disease.

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