An investigation of the ability of the glutaraldehyde test to distinguish between acute and chronic inflammatory disease in horses.

The researchers investigated whether the glutaraldehyde test could differentiate between acute and chronic inflammatory diseases in horses, a usage not previously explored.

Purpose and Methodology of the Research

• The study was aimed at determining the effectiveness of the glutaraldehyde test (GT), already used in bovine practice, in diagnosing inflammatory diseases in horses, and its ability to distinguish between acute and chronic conditions.
• GT works by creating a clot in a first degree chemical reaction with glutaraldehyde binding to free amino groups in fibrinogen and immunoglobulin. The clotting time estimates the protein content that is produced in response to inflammation.
• In this investigation, the researchers used several methods, including GT, complete clinical examination, history, and routine blood analysis, to examine 37 horses with suspected inflammatory diseases.

Results and Findings

• The study’s outcome indicated that horses identified as acutely affected based on history, clinical examination, and routine blood analysis, had more tendency to show a negative GT result, representing 75% of such cases.
• Interestingly, the GT results were not correlated with the concentration of fibrinogen in the blood. The fibrinogen concentration is generally used as an indicator of inflammation.
• Additionally, a positive GT outcome seemed to foretell a fatal result in about 69% of the clinical cases examined during the study. Thus, aside from diagnosing the type of inflammation, the GT could also predict the horses’ survival.

Conclusions and Implications

• The research points out that GT could potentially be a useful diagnostic tool to differentiate between acute and chronic inflammatory conditions in horses. This practical application fills a gap, as to date, GT’s use hasn’t been explored for horses.
• Even though the GT didn’t align with fibrinogen concentrations — usually an inflammation indicator — it predicted the disease progression: the higher the likelihood for fatal outcomes, the more the GT is positive.
• Although the study’s results indicate GT’s potential use in equine practice, the differences between bovine and equine physiology would require the test’s further validation.