Tularemia in two cats.

Tularemia was diagnosed in 2 cats that were examined because of pyrexia and lethargy; both cats had a history of exposure to wild rabbits. One cat was vomiting, and the other was anorectic. Physical examination revealed dehydration, lymphadenopathy, and hepatomegaly. Hematologic and serum biochemical abnormalities included toxic neutrophils, high band neutrophil count, thrombocytopenia, and hyperbilirubinemia. Diagnosis was confirmed by isolating Francisella tularensis subsp tularensis from bone marrow or lymph node aspirates. Evaluation of samples collected during the acute and convalescent phases of the disease revealed an increase in serum F tularensis antibody titer. Both cats responded to treatment with fluids and antibiotics.