Feline calicivirus (often called calici or FCV) is a contagious viral infection in cats that commonly affects the mouth, respiratory tract, and sometimes the joints.
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Common calicivirus cat symptoms include:
Mouth ulcers on the tongue, gums, or cheeks
Drooling and bad breath
Loss of appetite
Sneezing or nasal discharge
Lethargy and fever
Symptoms can vary depending on the strain and the cat’s immune response.
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Yes. Feline calicivirus is one of the leading causes of mouth ulcers, including ulcers on the tongue and gums, which can make eating painful.
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Limping calici refers to a form of calicivirus infection where cats especially kittens develop temporary limping due to joint inflammation. Appetite loss and fever may occur at the same time.
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Yes. Calicivirus in kittens is common, especially in shelters or multi-cat environments. Kittens may show mouth ulcers, respiratory signs, or limping.
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Feline calicivirus spreads through:
Direct contact with infected cats
Saliva and nasal secretions
Shared bowls, litter boxes, or grooming tools
The virus can survive in the environment, making it highly contagious.
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Diagnosis is based on clinical signs and veterinary evaluation. In some cases, PCR testing may be used to detect feline calicivirus infection.
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Calicivirus is a viral infection, so antibiotics do not treat the virus itself. Antibiotics may be prescribed by a veterinarian only to manage secondary bacterial infections when present.
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Home care may support comfort, but feline calicivirus treatment should always be guided by a veterinarian. Severe cases require professional evaluation and monitoring.
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Yes. Some cats develop chronic calicivirus, with recurring mouth inflammation or persistent symptoms over time.
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No. Feline calicivirus does not infect humans and is species-specific to cats.
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Virulent systemic feline calicivirus is a rare but severe form that can cause widespread illness. It requires immediate veterinary care.
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You should consult a veterinarian if your cat has:
