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(Science: virology) A genus of viruses (family papovaviridae) containing dNA (mW 5 × 106), having virions about 55 nm in diameter, and including the papilloma and warts viruses of man and other animals, some of which are associated with inductions of carcinoma.

Over 70 types are known to infect man and are differentiated by dNA homology. The virus can cause proliferation of the epithelium, which may lead to malignancy.

A wide range of animals are infected including humans, chimpanzees, cattle, rabbits, dogs, and horses.

Includes the cause of genital warts or condylomata.

See: papilloma, Shope papilloma virus, human papilloma virus.

Synonym: papilloma virus.