A Case of Superovulation after Ovariectomy in a Holstein Dairy Cow with an Abscessed Ovary

Abstract

The right ovary of a Holstein dairy cow aged 10 years was enlarged to 20×7×7 m. After a presumptive diagnosis of granulosa cell tumor, ovariectomy was performed. An encapsulated abscess was detectedin the mass, and Aerococcus viridans was isolated from the exudate. The abscess may have been causedeither by former surgery for left abomasal displacement or by an intraovarian injector used to treatfollicular cyst. After the ovariectomy, the cow regained a normal estrous cycle and was able to produce good-quality embryos through superovulation treatment.