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Avian Pathol: Circovirus inclusion bodies in intestinal muscle cells of a canary.

Multiple cytoplasmic inclusion bodies were observed in the intestinal smooth-muscle cells of an adult canary from an aviary with a history of high mortality (50%). Grossly, a mild enteritis was the only lesion appreciable. Smears of the proventricular content contained a few megabacteria (Macrorhabdus ornithogaster). The intestinal inclusions were found in high numbers in all parts of the tract examined. They appeared round to oval, amphophilic, and hyaline in sections stained with hematoxylin and eosin, and magenta with Feulgen stain. Inclusions of the same type were occasionally detectable in the wall of splenic and pancreatic arteries. No inclusions or lesions were seen in the other organs examined. Transmission electron microscopy of the intestinal wall revealed circovirus-like particles, either in paracrystalline arrays or loose arrangements, mostly within the cytoplasm of the intestinal-muscle cells. Polymerase chain reaction amplification and sequence analysis confirmed infection with canary circovirus.

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Author:Rampin, T.; Manarolla, G.; Pisoni, G.
Publication:Journal of Avian Medicine and Surgery
Article Type:Reprint
Geographic Code:1USA
Date:Dec 1, 2006
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