Overview of FCV
Feline calicivirus (pronounced cal-ee-chee virus, also known as FCV), a common viral disease that affects cats, is characterized by upper respiratory symptoms, pneumonia, oral ulceration (sores in the mouth), and occasionally arthritis. It is a fairly mild flu-like condition and rarely causes serious complications.
Calicivirus is part of the feline upper respiratory infection (URI) complex, a group of viral and bacterial infections (e.g., FHV-1, chlamydiosis) that cause discharge from the eyes and nose. Calicivirus and feline rhinotracheitis virus account for 85% to 90% of all URIs in cats.
Incidence and Prevalence of FCV
Calicivirus occurs worldwide and affects all breeds of cats. Vaccination has reduced the incidence of clinical disease, but it hasn't decreased the prevalence of the virus. The virus is spreading, even though fewer cats show symptoms.