The Feline Leukemia Virus (FeLV) is a member of the 
Retroviridae family, sharing the genus gammaretrovirus 
with the Xenotropic Murine Leukemia Virus-related 
gammaretrovirus (MLV) and the Gibbon Ape Leukemia 
Retrovirus (GALV). FeLV is pathogenic for domestic 
cats and involved in proliferative, degenerative