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Any of a genus of DNA viruses that infect birds and mammals and induce tumors in certain rodents.


(ˌpɒl iˈoʊ məˌvaɪ rəs)

n., pl. -rus•es.
any of several small DNA-containing viruses of the family Papovaviridae, capable of producing a variety of tumors in mice, hamsters, rabbits, and rats.
[1955–60; poly- + -oma + virus]
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The viruses that are associated with cancers include hepatitis B and C viruses (HBV and HCV), human papilloma viruses (HPV), human T-cell leukemia virus (HTLV-1), human immunodeficiency virus (HIV), Epstein-Barr virus (EBV), human herpes virus 8 (HHV-8) which is also known as Kaposi sarcoma-associated herpes virus (KSHV), and Merkel cell polyomavirus (MCV).
Detection of beak and feather disease virus (BFDV) and avian polyomavirus (APV) DNA in psittacine birds in Italy.
The aetiological factors contributing to development of Bowen's Disease include solar and UV radiation, arsenic exposure, radiotherapy, immunosuppression, HPV and other Polyomavirus infection.
Merkel cell polyomavirus (MCPyV) was identified in January 2008 by Feng et al (26) in tumor tissue from McC patients, proving clonal integration of the virus DNA into the host genome and finding prevalence of MCPyV DNA in McCs to be as high as 80% (n = 10).
The morphology of these inclusions suggested adenovirus, and less likely psittacid herpesvirus-1 and avian Polyomavirus as possible viral agents.
Responses were observed in patients regardless of PD-Ll tumor expression or presence of Merkel cell polyomavirus," the FDA said.
The five viruses include human immunodeficiency virus type 1, human T-cell lymphotropic virus type 1, Epstein-Barr virus, Kaposi sarcoma-associated herpesvirus, and Merkel cell polyomavirus.
Adenovirus encephalitis often occurs as a complication of severe respiratory disease; (7) described the role of adenovirus in neurological infections, particularly encephalitis, with and incidence of 76 % and possible multiple infection with herpesvirus and polyomavirus, as usual in immunosuppressed patients.
Identification of WU polyomavirus from pediatric patients with acute respiratory infections in Beijing, China.