Antibody dynamics during gestation in cows naturally infected with Neospora caninum from four dairy herds in Brazil - Cardoso, José Márcio Sbruzzi; Nishi, Sandra Mayumi; Funada, Mikaela Renata; Amaku, Marcos; Guimarães Junior, José da Silva; Gennari, Solange Maria (Brazilian Journal of Veterinary Research and Animal Science, 2009)