Seroprevalences of Toxoplasma gondii and Neospora caninum in Swedish red foxes (Vulpes vulpes).

The prevalences of antibodies to the protozoan parasites Toxoplasma gondii and Neospora caninum were investigated by the direct agglutination test (DAT) and ELISA, respectively, in 221 red foxes (Vulpes vulpes) from different parts of Sweden. A total of 84 (38%) of the analysed sera had antibodies to T. gondii, but none of the foxes had antibodies to N. caninum. The results indicate that T. gondii infection is fairly common in Swedish red foxes and that the infection is present in most parts of the country. They also show that N. caninum is not widespread as a latent infection among red foxes in Sweden.