Feline Upper Respiratory Disease Complex

Feline Upper Respiratory Disease Complex2

Infectious upper respiratory infections are very common in cats. There are a number of infectious agents that can cause and/or contribute to these infections. Two of the most common causes are viruses -- feline viral rhinotracheitis (feline herpesvirus, type 1) and feline calicivirus. Because upper respiratory infections are so common in cats, many pet owners know that the signs include fever, sneezing, runny nose, and loss of appetite. A rather large percentage of cats can become carriers of feline herpesvirus and/or feline calicivirus after they clinically recover from infection. These cats may appear clinically normal, but the virus can become reactivated (and the cat can develop clinical signs again) after some type of stressful event.