View article

To determine whether heifers with naturally acquired congenital exposure to Neospora sp would transmit the infection to their offspring during gestation.

Prospective cohort study.

Neonatal heifers on a dairy with a history of Neospora sp infections were selected for the study on the basis of their serum titers to Neospora sp, as determined by the use of indirect fluorescent antibody testing. Seropositive heifers (n = 25) had titers ≥ 1:5,120 and seronegative heifers (25) had titers ≤ 1:80. All heifers were raised and bred on the dairy, and samples were obtained from heifers and their calves at the time of calving.

Blood samples were tested for Neospora sp antibodies. Histologic evaluations …