We examined the presence of antibodies against the parasites Toxoplasma gondii, Neospora caninum, and Leishmania spp., as well the presence of DNA from Leishmania spp., in dogs from Pirassununga -SP. The seropositivity rate was compared with the animals' originating location. Three hundred seventy-three blood samples from the county's kennel and local veterinary clinics were collected and analyzed. A total of 300 samples were tested for T. gondii and N. caninum using an indirect immunofluorescence antibody test (IFAT); 45% (135/300) were positive for T. gondii and 24.3% (73/300) were positive for N. caninum. Three hundred seventy-three samples were tested for Leishmania spp. using the IFAT. Of these, 4.6% (17/373) were positive. Additionally, 145 samples were tested using a polymerase chain reaction (PCR); of these samples, 0.7% (1/145) was positive. Considering the results, we conclude that these parasites are present in the city of Pirassununga -SP and that the animals have contact with the protozoan. It is therefore necessary to create methods for disease prevention to maintain both animal and human health in regard to leishmaniasis and toxoplasmosis.Keywords: IFAT, PCR, dogs, epidemiology, Leishmania spp., Neospora caninum, Toxoplasma gondii. ResumoAvaliou-se a presença de anticorpos contra Toxoplasma gondii, Neospora caninum e Leishmania spp.; assim como a presença de DNA de Leishmania spp. em cães de Pirassununga-SP, e associou-se sua soropositividade ao local de origem dos animais. Foram coletadas 373 amostras de sangue do canil municipal e de clínicas veterinárias locais, que foram analisadas pelo teste de Imunofluorescência Indireta (RIFI). Do total, 300 amostras foram testadas para T. gondii e N. caninum, das quais 45% (135/300) foram positivas para T. gondii e 24,3% (73/300) para N. caninum. Para Leishmania spp. foram avaliadas 373 amostras pela RIFI, sendo 4,6% (17/373) positivas. Adicionalmente, 145 amostras foram testadas utilizando-se a PCR e, dessas amostras, 0,7% (1/145) foi positiva. Considerando-se os resultados, pode-se concluir que esses parasitos estão presentes na cidade de Pirassununga -SP e que os animais tiveram contato com os protozoários. Faz-se, dessa forma, necessária a divulgação de meios de prevenção às doenças, com o intuito de manter o controle sobre as mesmas, tanto na saúde animal quanto na saúde humana, em relação à leishmaniose e à toxoplasmose.
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