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Veterinary Pathology, Vol 36, Issue 4 345-347, Copyright © 1999 by American College of Veterinary Pathologists

ARTICLES

Nocardia nova causing pulmonary nocardiosis of black crakes (Limnocorax flavirostra)

L. N. Bacciarini, H. Posthaus, O. Pagan and R. Miserez
Institute of Animal Pathology, University of Bern, Switzerland. bacciarini@itpa.unibe.ch

Natural nocardial infection has been reported in many different species including mammals and fish, but reports in birds remain uncommon. Eight juvenile Black Crakes (Limnocoraxflavirostra) died unexpectedly at the Basle Zoo. Necropsy revealed disseminated white, firm nodules, 1-3 mm in diameter, throughout the lung parenchyma. Histologically, the lungs contained multiple, often confluent granulomas with central necrosis. Delicate, gram-positive, 0.5- to 1.0-microm-wide, branching, occasionally beaded, filamentous organisms were visible in necrotic centers. These organisms were acid fast when stained with Fite-Faraco. No histologic lesions were seen in other organs. Nocardia nova was isolated from liver, spleen, kidney, and lung. Granulomatous and necrotizing nocardial pneumonia with agonal septicemia was diagnosed, suggesting an aerogenous infection. To our knowledge, this is the first reported epizootic outbreak of nocardiosis in birds, which is additionally unusual because it was caused by N. nova.


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T. L. Reynolds, H. J. Barnes, B. Wolfe, L. Lu, D. M. Camp, and D. E. Malarkey
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[Abstract] [Full Text] [PDF]


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