Titer Response in Cows Vaccinated with a Neospora caninum Vaccine

Abstract

In a 65-cow herd located north of lthaca, 12 abortions had occurred during 1999; four between mid-January and mid-February, one in March and one more in July. The remaining six abortions had occurred between the beginning of September and mid-October, three of them within one week during mid-October. Submission of a blood sample from the last aborting cow revealed a positive Neospora caninum titer. Upon screening 15 cows including most of the cows that had previously aborted, nine animals were found positive to Neospora caninum. It was decided to try and controlling the problem by vaccinating with a Neospora caninum vaccine.