The objective of this study was to determine the frequency of antibodies anti-Neospora caninum in cows and fetuses from Municipalities of southern Minas Gerais. A total of 559 serum samples of cows of the a bank of sera formed from of serum samples collected at 18 dairy farms, distributed for seven Municipalities of the Lavras Micro region, southern Minas Gerais, and 575 serum samples of cows and 503 serum samples of fetuses were collected at slaughter house of Campo Belo, MG. Serum samples were submitted to the indirect fluorescent antibody tests (IFAT), using as antigen taquizoites of N. caninum, and as cut-off values the serum dilution of 1:25 for the fetuses serum and 1:200 for the cows. The frequency in the cows of the Lavras Micro region was of 91.2% (510/559). The frequency was of 97.2% (559/575) and 12.7% (64/503) for females and fetuses from slaughter house, respectively. These results indicate that the infection by N. caninum is endemic in dairy cattle of the Lavras Micro region, southern Minas Gerais, Brazil.
Neosporosis; bovine; congenital transmission; fluorescent antibody
