Seroprevalences of Neospora caninum and Toxoplasma gondii in nondomestic felids from southern Africa.

Sera from 68 nondomestic captive and free-ranging felids from southern Africa were tested for antibodies to Neospora caninum and Toxoplasma gondii by the indirect fluorescent antibody test. Four of the 68 (5.9%) serum samples were positive for antibodies to N. caninum, with titers ranging from 1:50 to 1:200. All other animals were negative for antibodies to N. caninum at a dilution of 1:50. Fifty of the 68 (74%) serum samples tested positive for antibodies to T. gondii, with titers ranging from 1:50 to 1:26,500. Four animals tested positive for antibodies to both N. caninum and T. gondii. None of these animals displayed clinical signs of disease. Results of this study indicate that nondomestic felids in southern Africa have been exposed to, and are likely infected with, N. caninum and T. gondii.