Gluteal pyomyositis associated with septic proximal femoral physitis in a 12-day-old Standardbred filly foal.

This study outlines the case of a 12-day-old filly foal diagnosed with gluteal pyomyositis and septic proximal femoral physitis, which led to euthanization after conservative treatments failed.

Introduction and Background

• This research focuses on a case study involving a young 12-day-old Standardbred filly foal.
• The foal was initially presented with an acute onset hindlimb lameness that had persisted for 24 hours.

Diagnosis

• An initial ultrasound examination of the affected area, the right gluteal region, showed changes in the muscle architecture, indicating inflammation.
• Two days after the start of treatment, the same area developed a condition identified as gluteal pyomyositis, a bacterial infection within the muscle.
• Simultaneously, a septic proximal femoral physis was discovered, a condition in which the growth plate near the top of the femur becomes infected.

Treatment and Outcome

• A conservative approach was taken in treating the foal’s conditions.
• This involved using antimicrobials to fight the infection and keeping the foal rested in its stall.
• Despite these efforts, the infection worsened and the affected area had to be drained twice by percutaneous aspiration, a procedure to remove fluid using a needle.
• Unfortunately, the foal’s condition did not improve, leading to the decision to euthanize it four days after it was brought in for treatment.

Post Mortem Examination

• Following euthanasia, a comprehensive necropsy examination was performed.
• This investigation revealed that the infection had spread to the proximal femoral physis, causing septicemia.
• Interestingly, there was no apparent joint involvement, leading researchers to believe that the infection was localized to the muscle and proximal femoral physis.