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Cytauxzoonosis

A highly seasonal, often fatal tick-borne parasitic disease in domestic cats caused by Cytauxzoon felis.

Key Facts

The disease is highly seasonal, occurring primarily in spring and early summer when tick populations are active.
Domestic cats typically experience severe, often fatal symptoms, while bobcats act as asymptomatic natural hosts.
Without prompt treatment, many infected cats die within one week of showing clinical signs.
The infection progresses rapidly with a two to three-week incubation period following the initial tick bite.

Infection with this parasite directly results in the clinical disease cytauxzoonosis.

Jaundice is a common clinical sign resulting from parasite-induced hemolysis in infected cats.

Aggressive supportive care is required to give infected cats the best chance of survival.

PCR provides a definitive diagnosis for cytauxzoonosis, especially in early or ambiguous cases.

The disease is exclusively transmitted through the bite of infected ticks, making prevention critical.