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Journal of Veterinary Diagnostic Investigation, Vol 13, Issue 4, 365-368
Copyright © 2001 by American Association of Veterinary Laboratory Diagnosticians

Articles

Detection and confirmation of reptilian adenovirus infection by in situ hybridization

LE Perkins, RP Campagnoli, BG Harmon, CR Gregory, WL Steffens, K Latimer, S Clubb, and M Crane

Department of Veterinary Pathology, College of Veterinary Medicine, University of Georgia, Athens 30602, USA.

Adenovirus infections are documented in at least 12 different species of reptiles. In contrast to their mammalian and avian counterparts reptilian adenoviruses are not well characterized as to their pathogenic potential and their ability to cause primary disease. In the diagnostic setting, fresh tissues are often not available for virus isolation, and the confirmation of reptilian adenovirus infections is dependent largely upon electron microscopy for the identification of intranuclear viral inclusions associated with histopathologic changes. The diagnosis of adenovirus infection in 2 different species of snake was confirmed by the application of DNA in situ hybridization. Using an aviadenovirus specific oligoprobe, adenoviral DNA was observed in the nuclei of hepatocytes, Kupffer cells, endothelial cells, and enterocytes. Electron microscopy of the liver confirmed the presence of intranuclear viral particles morphologically consistent with an adenovirus. DNA in situ hybridization on formalin-fixed tissues can serve as a suitable alternative to electron microscopy in the diagnosis of reptilian adenovirus infections. Both affected snakes had other concurrent diseases, suggesting that the adenovirus may not have been the primary pathogen.


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