In vitro evaluation of the automated hematology analyzer XN-31 for rapid diagnosis of equine piroplasmosis.

This research article describes a study that assessed the Sysmex XN-31 automated hematology analyzer’s effectiveness in diagnosing equine piroplasmosis swiftly. Researchers confirmed that the XN-31, originally meant for human malaria diagnosis, could identify equine piroplasmosis in about 1 minute with high sensitivity.

Objective of the Study

The study purposed to test the Sysmex XN-31 automated hematology analyzer to diagnose equine piroplasmosis, a disease caused by protozoa affecting horses and other equids, quickly and accurately. Traditional diagnostic methods—using microscopic, molecular, and serological means—are slow, hence the need for the rapid testing technique.

Methodology

• The team leveraged the XN-31 analyzer, originally designed for swift malaria diagnosis in humans.
• They modified the XN-31 to suit horse blood samples, dubbing the modified version XN-31m.
• They then measured cultured parasites using this customized XN-31m analyzer.
• The researchers evaluated various parameters including limit of detection (LoD), limit of quantification (LoQ), linearity, carryover, precision, and correlation with microscopic examination.

Findings

• The XN-31m could detect infected red blood cells (RBCs) in approximately 1 minute.
• The LoD and LoQ for the parasites were determined and found to be relatively low.
• The linearity showed an excellent correlation with the results, making the measurements accurate.
• The carryover never exceeded 0.5%, meaning there was minimal risk of cross-contamination between tests.
• The coefficient of variation was under 5%, indicating high precision and consistency.
• There was a high correlation between the results obtained using XN-31m and the traditional microscopic examination method.

Conclusion

The Sysmex XN-31 analyzer was able to detect the protozoan parasites causing equine piroplasmosis in an extremely short time. This research demonstrates that the XN-31 analyzer has a high potential to serve as a rapid, user-friendly diagnostic method for equine piroplasmosis, improving timing and efficiency.