Feline immunodeficiency virus
| Feline immunodeficiency virus | |
|---|---|
| Virus classification | |
| (unranked): | Virus | 
| Realm: | Riboviria | 
| Kingdom: | Pararnavirae | 
| Phylum: | Artverviricota | 
| Class: | Revtraviricetes | 
| Order: | Ortervirales | 
| Family: | Retroviridae | 
| Genus: | Lentivirus | 
| Species: | Lentivirus felimdef | 
Feline immunodeficiency virus (FIV) is a lentivirus that affects cats worldwide and 2.5% to 4.4% of felines are infected.
FIV was first isolated in 1986, by Niels C. Pedersen and Janet K. Yamamoto at the UC Davis School of Veterinary Medicine in a colony of cats that had a high prevalence of opportunistic infections and degenerative conditions, and was originally called feline T-lymphotropic virus. It has since been identified in domestic cats.