Bacterial epididymitis in two stallions.

The study explores the cases of two stallions that were diagnosed with bacterial epididymitis caused by S zooepidymicus. Their diagnosis and subsequent treatments, including unilateral orchidectomy and antibiotics, are discussed.

Understanding Bacterial Epididymitis

• Bacterial epididymitis is inflammation of the epididymis (a coil-like structure at the back of the testis that stores and carries sperm) caused by bacteria. In this case, the infecting bacteria was S zooepidemicus.
• This disease is notable for causing fertility issues in stallions, making it a significant concern for breeders and veterinary professionals.

Diagnostic Techniques

• The diagnosis was based on several factors: bacterial isolation, white blood cell (WBC) count in the semen, higher than normal blood fibrinogen concentration, and leukocytosis with regenerative left shift. Leukocytosis indicates an increased number of white blood cells, often in response to an infection or inflammation.
• Ultrasonography (a diagnostic imaging technique using sound waves) was also used to examine the epididymides. The ultrasound revealed changes consistent with abnormal exudate (fluid that has seeped out of blood vessels due to inflammation) accumulation in the tail of the epididymis.
• One of the horses had a high seminal pH, further indicating the presence of infection.

Treatment and Results

• The prescribed treatment for these two stallions involved a unilateral orchiectomy (surgical removal of one testicle) and the administration of antibiotics to fight the infection.
• For the first stallion, the infection persisted despite the treatment. Information about the response of the second stallion to treatment was not available at the time of the study.
• This suggests that while orchiectomy and antibiotic treatment can be used to target bacterial epididymitis, their effectiveness may vary, and the infection can persist in some cases.