Cat Calicivirus in Shelters: Prevention and Management

Feline calicivirus is a highly contagious respiratory pathogen that poses significant welfare and management challenges in shelter environments.

Key Facts

FCV causes upper respiratory infection with oral ulcers, sneezing, and nasal discharge
Virulent systemic FCV strains cause severe disease including facial edema, limping, and high mortality
The virus is extremely hardy and can survive up to a month on surfaces
Vaccination provides protection against common strains but not all virulent variants
Shelter environments facilitate rapid spread through direct contact and fomites
Carrier cats can shed virus intermittently for months or years after recovery
Isolation protocols and hygiene are essential - 1:32 bleach solution inactivates FCV

Welfare Considerations

FCV outbreaks in shelters cause significant animal suffering, particularly with virulent systemic strains that cause painful oral ulcers, limb swelling, and high mortality. The stress of shelter environments suppresses immunity and increases susceptibility. Controlling FCV requires balancing isolation needs with ensuring sufficient socialization and enrichment for cats in care.

What You Can Do

Support shelters that maintain robust vaccination, sanitation, and isolation protocols
Advocate for adequate staffing in shelters to properly implement infection control measures
Foster cats to reduce shelter density and FCV transmission risk
Donate cleaning supplies and support sanitation improvements at your local shelter
Vaccinate your own cats against FCV before adoption and maintain boosters
Support research on virulent systemic FCV strains and improved vaccine coverage