The advantages of using cytospins of uterine lavage fluid for the diagnosis of equine endometritis.

The research article looks into the benefits of using ‘cytospins’, or processed cell samples from uterine lavage, in diagnosing equine endometritis. The study examines how manual and automatic cytospins compare and evaluate their effectiveness in disease identification.

Understanding the Research Process

• The study involved two parts. The initial part used 16 mares undergoing a ‘utrine lavage’ (UL) procedure, a common diagnostic technique for endometritis. The retrieved fluid was cytocentrifuged (separated by density through spinning) in both automatic and manual devices. The remained part of the liquid was subject to centrifugation, and the sediment was divided into three parts. These were examined and analysed based on cellularity, cell preservation, presence of inflammatory cells, bacteria, and contaminants.
• The second part of the research involved comparing the most successful cytospin method discovered in the first part of the study (manual) with sediment smears in 13 additional mares that underwent UL.

Key Findings

• Failings in agreements were observed between sediment smear and cytospin results; they ranged from poor to moderate. Compared to sediment smear, cytospin results were found to be more cellular and provided superior morphological details.
• It was noted that contaminants were frequently detected in the cytospin samples, particularly urine crystals and faecal contamination. However, no significant differences in the presence of inflammatory or epithelial cells were observed.
• The manual cytospin method (PostMan) proved more effective in examining the UL fluid and showed higher sensitivity in diagnosing endometritis. Pertaining to the sensitivity of the methods, the PostMan was rated at 80%, while sediment smears stood at 60%.
• The study concluded that the manual cytocentrifugation method had significant advantages over sediment smears for lavage fluid evaluation. This method was deemed suitable for the conditions of horse stables.