Anti-Neospora caninum antibodies in beef cattle from the northern region of Paraná state, Brazil

The presence of anti-Neospora caninum antibodies in beef cattle slaughtered in the northern region of the state of Parana, Brazil, was evaluated. A total of 401 blood samples were collected; 281 samples from the municipality of Rolandia and 120 from the municipality of Borrazopolis, between April 2015 and November 2016. Of the total samples, 289 were from females and 112 from males, aged one and a half to eight years. Indirect fluorescent antibody test (IFAT) was performed, using a cut-off of 1:100. Variables were tabulated for statistical analyses (Fisher's exact test and chi-square tests, p <= 50.05). The analysis showed that of the 401 samples, 37 were positive for N. caninum, indicating a prevalence of 9.2 %, and observed titers were 1:100 (16), 1:200 (14), and 1:400 (7). The variables sex, age, and location did not differ statistically (p>0.05). Our results showed a sero-occurrence of N. caninum in cattle slaughtered in the northern region of the state of Parana.