Calicivirus infection is the most common infection that causes upper respiratory tract infections and oral diseases in cats. In fact, calicivirus infection of cats is one of the two important causes of respiratory tract infections in cats.
The virus is a virus of the family Caliciviridae, the genus Vesivirus. Calicivirus is a virus with a single-stranded RNA genome.
Bronchitis, bronchopneumonia, pneumonia, ulcerative diseases, enteritis and arthritis occur in cats depending on the causative agents of the feline Calicivirus (FCV).
The FCV vaccine is the best preventative for cats and can reduce symptoms when the cat acquires the virus. Vaccination should be done regularly every year.
Resources:
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Holzworth, J. et al (1987): Diseases of the cat. philadelphia, WB Saunders Co.
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Wardley, R.C. (1976): Feline Calcivirus carrier state: A study of the host/virus relationship. arch. viral. 52:243.