Feline viral rhinotracheitis (FVR) is a respiratory disease of cats caused by feline herpesvirus 1, of the family Herpesviridae. It is also known as feline influenza and feline coryza. Viral respiratory diseases in cats can be serious, especially in catteries and kennels. Causing one-half of the respiratory diseases in cats, FVR is the most important of these diseases and is found worldwide. It is very contagious and can cause severe disease, including death from pneumonia in young kittens. All members of the Felidae family are susceptible to FVR, in fact FHV-1 has caused a fatal encephalitis in lions in Germany.
FVR is transmitted through the air and direct contact. The virus is shed in saliva and eye and nasal secretions, and can also be spread by fomites. FVR has a two to five day incubation period. The virus is shed for one to three weeks postinfection. Latently infected cats (carriers) will shed FHV-1 intermittently for life, with the virus persisting within the trigeminal ganglion. Stress precipitates shedding.

Feline Herpes Cat Flu FVR - Articles by Dr. Dennis Hacker and Dr. Margaret Muns plus many links to feline herpes and anti-virals.
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