A report of two cases of pyometra in the Hanoverian and Thoroughbred mares

Pyometra is an uncommon condition in mares and causes persistent (chronic) a accumulation of purulent material within the lumen of the uterus that lesd to grossly enlarged uterus. The possibility of recurrence after treatment is high. Here, we report pyometra in a 16-year-old Hanoverian mare with a history of infertility in the last 3 years despite repeated breeding, as well as a 15-year-old Thoroughbred mare with a 5 year history of infertility.
Palpation of the uterus per rectum of the both mares revealed uniformly enlarged uterus located farther ventral in the abdomen. Ultrasonography revealed the uterus filled with echogenic fluid and no fetus could be seen. A corpus luteum (CI) was present on the left ovary. In the both mares, 3 days after prostaglandin injection transluminal adhesions of the cervix was broken down by digital palpation and 14 liter of milky creamy exudate from the uterus of Hanoverian mare and 8 liter from the uterus of Thoroughbred mare were collected using uterine flushing tube and then uterine lavage was performed. Bacteria isolation and identification in the both mares showed growth of Streptococcus equi subspecies zooepidemicus. Systemic antibiotic therapy, topical antimicrobial ointments for prevention of cervical adhesion and uterine lavage were performed frequently.