EVOLUTION

ANIMAL BREEDS

DISEASES

MEDICATIONS

FOOD/FEED

BEHAVIOUR

EXOTIC ANIMALS

SPECIAL SECTION

Viral Disease - Papillomatosis (warts)

Etiology

Papillomaviruses. Host specific, and in cattle, some types have site and lesion-type specificity

Epidemiology

Occur in all countries in all species but most common in young cattle and horses. Transmission is by direct contact and fomites

Clinical findings

Solid outgrowths of epidermis, may be sessile or pedunculated.

Most common type in cattle occurs on head and neck and has cauliflower-like

appearance, but lesion site and appearance varies with papilloma type. In the horse,

lesions are on the face and lips

Clinical pathology

None specific

Lesions

Papilloma or fibro papilloma

Differential diagnosis

Clinically, there is little difficulty in making a diagnosis of papillomatosis with the possible exception of atypical papillomas of cattle, probably associated with an unidentified type of the papillomavirus. These lesions are characterized by an absence of dermal fibroplasia, and are true papillomas rather than fibropapillomas. All ages of animals can be affected and the lesions persist for long periods. They are characteristically discrete, low, flat and circular, and often coalesce to form large masses. They do not protrude l i ke regular warts and the external fronds are much finer and more delicate.

Horses

  • » Sarcoid
  • » Melanoma

Diagnostic confirmation

Histology and DNA identification by pcr in biopsy or tissue scraping

Treatment

Removal by surgery or cryosurgery. Vaccination with autogenously vaccine.


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