Sacroiliac lesions as a cause of chronic poor performance in competitive horses.

The study chronicled the discovery and examination of sacroiliac disorders in 11 competitive horses that led to their underperformance and eventual death. The vets were unable to establish the root cause of the disease, but provided insights into its effects and likely onset.

Research Focus

• The study was focused on exploring the causes of chronic poor performance in horses. In particular, the researchers were interested in investigating sacroiliac lesions as a potential cause.

Study Overview

• The researchers examined the clinical histories and signs in 11 horses that had chronically low performance, beleived to have been caused by damage to the sacroiliac joint.
• The most common symptom among the horses was a lack of impulsion from one or both of the hindlimbs. This inhibited their rear gait and resulted in low-grade lameness.
• Temporary improvements in the horses’ conditions were achieved through the administration of anti-inflammatory drugs, however, the progress was deemed unsatisfactory and all horses had to be euthanized.

Post Mortem Findings

• Upon post mortem examination, it was found that the identified changes were restricted to the sacroiliac joints of the horses.
• The examination revealed varied macroscopic and histological findings. In only two cases, the changes could be classified as arthrosis histologically.
• In the other nine cases, there was an observed increase in joint surface area or an irregular outline. These were associated with an extension of the joint on the caudomedial aspect and were interpreted as indications of chronic instability of the joint causing a restriction in the hindlimbs’ impulsion.

Interpretation and Future Research

• The researchers were unable to find an underlying cause for the sacroiliac lesions in these select competitive horses.
• The effects and possible onset of such lesions are discussed, providing a foundation for future research on the topic to help in early detection and treatment of the condition in competitive horses.