Difference between revisions of "Bovine Papillomaviruses"
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===Viral papillomas=== | ===Viral papillomas=== | ||
| − | + | in the pharynx | |
[[Category:Nasopharynx - Pathology]] | [[Category:Nasopharynx - Pathology]] | ||
Revision as of 17:14, 17 February 2011
- 2 groups:
- Fibropapillomas: viral DNA sequences, but no virus found
- Epithelial Papillomas: virus found
- Calves most commonly affected
- Usually resolves spontaneously
- Can undergo malignant transformation to alimentary carcinomas
- Usually concurrent with grazing bracken (co-carcinogen) and ingesting quercetin (immunosuppressant)
- Can cause squamous cell carcinoma of the eye in Hereford cattle, where UV light acts as the co-carcinogen
Papillomatosis
- Caused by Bovine Papillomaviruses|bovine papilloma virus-4.
- Usually affects pedunculated structures in reticulum/rumen of cattle.
Viral papillomas
in the pharynx