Pennsylvania Animal Diagnostic Laboratory System
PADLS Conferences Spring 2001 21. Case Report
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Neospora caninum is a parasitic protozoan that causes disease in livestock and companion animals. Neosporosis is regarded as the major cause of abortion in cattle in the US and other industrialized countries worldwide. Since its identification as an abortifacient agent in cattle, Neospora caninum has been associated with sporadic abortions, enzootic abortions, and abortion storms. Studies have indicated that 20-45% of all bovine abortions in dry lot dairies in California were attributed to neosporosis. Although the majority of literature focuses on neosporosis and its affect on the cattle industry of the Midwest and California, a recent study indicates that N. caninum is an important bovine abortifacient in the state of Pennsylvania as well.

A Pennsylvanian dairy cattle herd with a confirmed history of Neospora-induced abortions was monitored for serum antibody titers for a two-year period. A program of improved sanitation, removal of dogs and vaccination for Neospora caninum was instituted. Serological testing of individual animals before and after vaccination demonstrated an antibody response to vaccination. Records obtained from the DHIA demonstrated a decrease in the number of abortions following implementation of a control and vaccination program.

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