Research for anti - Toxoplasma gondii antibodies in free-living ducks (Cairina moschata) from Rio de Janeiro, RJ, Brazil

ABSTRACT Toxoplasmosis is a zoonosis determined by the protozoan Toxoplasma gondii with wide geographic distribution, which affects homeothermic animals, with felids being their definitive hosts and other mammals and birds being their intermediate hosts. Regarding the Latin American bird species Cairina moschata, there are few reports in Brazil of the exposure of these animals to this protozoan. Based on the above, this study aimed to report for the first time the exposure of C. moschata to infection by this parasite in Rio de Janeiro, Brazil, determining the serological frequency of anti-T. gondii antibodies in birds of this species. Sixty-seven specimens of C. moschata were captured in the vicinity of the Rio de Janeiro Zoo, and these animals at the time of capture were sorted by gender and type of feather. Blood samples from these animals were obtained by venipuncture to obtain the serum. The serum samples were subjected to IFAT for anti-T. gondii IgG. In general, the frequency of positive results was 58.21% (n=39), with a statistically significant association (p<0.05) between the animals with adult plumage and seropositivity. The exposure of ducks to T. gondii in the vicinity of the Zoo may indicate contamination of this area with protozoan oocysts.