Cloacal papillomas in psittacines.

J. P. Sundberg, R. E. Junge, M. K. O'Banion, E. J. Basgall, G. Harrison, A. J. Herron, H L Shivaprasad

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29 Scopus citations


Papilloma-like masses affecting the cloaca of 19 Amazons, 16 macaws, 3 parrots, 1 conure, and 1 parakeet were examined. Papillomatous lesions were characterized by proliferation of the lining epithelium on thin fibrovascular stalks. Carcinoma in situ was diagnosed in the cloaca of a macaw in addition to the other 16 macaws with papillomas. Papillomavirus group-specific antigens were not detected in any of the 41 lesions, using the peroxidase-antiperoxidase technique. The DNA extracts from 6 different frozen papillomas did not contain papillomavirus genomes detectable by Southern blot hybridization, using an African gray parrot cutaneous papillomavirus as a probe. Evidence of an infective agent was not found by electron microscopic examination of 8 of the papillomas. Inoculations of partially purified homogenates of a cloacal papilloma from a yellow-crowned Amazon did not induce lesion formation on cloacal mucosa of an adult yellow-crowned Amazon, green and yellow macaw, sulphur-crested cockatoo, or mollucan cockatoo.

Original languageEnglish (US)
Pages (from-to)928-932
Number of pages5
JournalAmerican Journal of Veterinary Research
Issue number4
StatePublished - Apr 1986
Externally publishedYes

ASJC Scopus subject areas

  • veterinary(all)


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