A complex of viral and bacterial agents can cause upper respiratory tract signs such as sneezing, nasal congestion, and nasal discharge in cats. Etiologies include feline herpesvirus (FHV), feline calicivirus (FCV), Bordetella bronchiseptica. Chlamydophila felts, and (less commonly) feline reovirus, cowpox virus, and mycoplasmas.
Poor husbandry and overcrowding in catteries or rescue shelters
Exposure to free-roaming cats in high-density feral populations
PROGNOSIS AND OUTCOME
Except in very young or compromised animals or in cases of virulent calicivirus, prognosis is usually good for recovery from acute bouts of respiratory disease. Some animals develop chronic rhinitis and/or keratoconjunctivitis and will have recurrent bouts of disease that may require lifelong management.