The aim of this study was to evaluate the relationship
between antibody titers against N caninum before pregnancy
in grazing dairy cows from herds with a systematic
control of other infectious diseases, such as brucellosis,
infectious bovine rhinotracheitis (IBR), bovine viral diarrhea
(BVD), and leptospirosis. Cows were monitored from
conception, throughout gestation, until the subsequent
pregnancy or culling after parturition or abortion. The
impact of spontaneous N caninum infection and its prevalence
on postpartum alterations (i.e., retained placenta,
metritis, and mastitis) and subsequent reproductive performance
was analyzed.