Diagnostic double-guarded low-volume uterine lavage in mares.

The research aims to validate the effectiveness of a new diagnostic test tool for endometritis in mares, using a double-guarded, low-volume uterine lavage. Comparisons were made with standard diagnostic tests and found that the new method is efficient and less likely to give false positives.

Objective of the Research

• The aim of this study is to compare the results from endometrial, cytologic, and bacteriologic examinations obtained by a new tool – the double-guarded flush technique, with standard diagnostic tests such as the double-guarded swab and biopsy.
• The research is focused on improving the diagnostic process for endometritis, a problematic condition in broodmare management. The ideal diagnostic test should have high sensitivity and specificity, allowing clear and accurate results.

Methodology

• The research seized 34 mares that were majorly used for research purposes. Various samples were collected at six different time points across four estrous cycles.
• The double-guarded flush technique used specifically designed equipment, consisting of a disposable uterine flushing tube, a sanitary sleeve, a sterile steel speculum, and a 250 mL fluid bag.
• All samples were evaluated cytologically and bacteriologically. To compare the efficacy of the new flushing technique, the endometrial biopsies from the first cycle were used as a gold standard for the calculations of diagnostic sensitivity and specificity.
• The presence of Escherichia coli and β-hemolytic streptococci were isolated in the samples and were used as the basis for comparison across the testing methods.

Findings of the Study

• Escherichia coli was the most frequently isolated pathogen in all samples. β-hemolytic streptococci were less likely to trigger a positive cytology reading when E. coli were present in the diagnostic tests.
• The detection of pathogens in uterine samples was highly associated with the presence of polymorphonuclear neutrophils (PMNs) in the tissue’s stratum compactum and stratum spongiosum, as seen in histology.
• By measuring the presence of PMNs in tissue specimens as the benchmark for diagnosing endometritis, the sensitivity of the lavage culture was found to be 0.75 and its specificity, 0.72.

Conclusion of the Study

• The research concludes that the double-guarded, low-volume lavage technique is an effective, rapid, and accurate method for diagnoses of endometritis in mares.
• The new technique displayed less risk of returning false-positive samples compared to other flushing techniques, indicating increased reliability.