ONCOGENIC VIRUSES
The oncogenic type of virus that may cause cancer, also called oncornaviruses to show the origin of the RNA virus. It now relates to any DNA or RNA genome gene that causes cancer and is synonymous with "tumor virus" or "cancer virus." Collectively, seven types of viruses are a major cause of cancer, particularly in less developed countries and for people with weakened immune systems. Cancers are not infectious in the sense that they are not spread from patients to direct contact. Tumor viruses are categorized into two general categories depending on whether an RNA or a DNA genome is incorporated into a contagious viral particle. In addition to the difference in reproduction and life cycle, RNA and DNA viruses also differ in their general mechanisms of cell transformation/immortalization, the first step in tumor growth. RNA tumor viruses, specifically creature retroviruses, are normally portrayed by the capacity to convey as well as change significant ce...