Genotyping of feline leukemia virus in Mexican housecats

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© 2016, The Author(s). Feline leukemia virus (FeLV) is a retrovirus with variable rates of infection globally. DNA was obtained from cats’ peripheral blood mononuclear cells, and proviral DNA of pol and env genes was detected using PCR. Seventy-six percent of cats scored positive for FeLV using env-PCR; and 54 %, by pol-PCR. Phylogenetic analysis of both regions identified sequences that correspond to a group that includes endogenous retroviruses. They form an independent branch and, therefore, a new group of endogenous viruses. Cat gender, age, outdoor access, and cohabitation with other cats were found to be significant risk factors associated with the disease. This strongly suggests that these FeLV genotypes are widely distributed in the studied feline population in Mexico.




Ramírez, H., Autran, M., García, M. M., Carmona, M. Á., Rodríguez, C., & Martínez, H. A. (2016). Genotyping of feline leukemia virus in Mexican housecats. Archives of Virology, 161(4), 1039–1045.

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