Which virus is associated with an increased risk of fibrosarcoma in cats?

Feline Leukemia Virus (FeLV) is closely associated with an increased risk of fibrosarcoma in cats due to its role in causing immunosuppression and promoting malignant transformations. FeLV is a retrovirus that can lead to a variety of hematological and immunological disorders in infected cats. One significant consequence of FeLV infection is the potential for the development of various neoplasms, including fibrosarcomas.

The mechanisms may involve the virus's ability to integrate its genetic material into the host's DNA, which can disrupt normal cellular regulatory processes, leading to uncontrolled cell proliferation and tumor formation. This is particularly relevant in fibrosarcomas, where there is often a correlation between viral infection and the occurrence of these tumors in the feline population.

Other viruses mentioned, such as Canine Parvovirus and Canine Distemper Virus, primarily affect dogs and have no established association with fibrosarcoma in cats. Feline Immunodeficiency Virus (FIV) also poses risks for various diseases, including some tumors, but FeLV has a more pronounced link with the specific development of fibrosarcomas in feline patients. Thus, FeLV stands out as the virus most notably connected to this type of cancer in cats