DNA ONCOGENIC VIRUSES

DNA ONCOGENIC VIRUSES - DNAONCOGENICVIRUSES

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DNA ONCOGENIC VIRUSES Several families of DNA viruses contain oncoviruses.     1. Papovaviridae---papilloma viruses cause uterine and cervical cancer    2. Herpesviridae---Epstein-Barr virus causes infectious mononucleosis and two human cancers,  Burkitt’s lymphoma and nasopharyngeal carcinoma. It may possibly also be involved in  Hodgkin’s disease. Most people carry this virus, but very few of them go on to develop cancer.    3. Hepadnaviridae---the hepatitis B virus probably causes most cases of primary liver cancer.      RNA ONCOGENIC VIRUSES  The only RNA viruses known to cause cancer are members of the family Retroviridae.     1. Human T-cell leukemia viruses (HTLV-1 and HTLV-2) cause adult T-cell leukemia and some  lymphomas in humans.     2. Sarcoma viruses of cats, chickens, rodents and mammary tumor viruses of mice are  retroviruses that are oncogenic.    3. Feline leukemia virus is also a retrovirus that causes a transmissible leukemia in cats.  
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DNA ONCOGENIC VIRUSES - DNAONCOGENICVIRUSES

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