| FPV | feline pseudoleukopenia virus; fowl plague virus |
|---|---|
| FSV | feline fibrosarcoma virus; forward stroke volume; functional subunit |
| FTLV | feline T-lymphotropic lentivirus |
| FUS | feline urologic syndrome; first-use syndrome |
| FVR | feline viral rhinotracheitis; forearm vascular resistance |