Validation of a hematology analyzer in donkey medicine.
Authors: Ferreira A M, Meneses G, Queiroga F L, Martins A, Cruz Z, Silvestre-Ferreira A C
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Hematology Analyser Validation in Donkeys The Asinina de Miranda, a protected Portuguese donkey sub-species, lacks established haematological reference ranges and validated laboratory protocols—a gap that hinders welfare assessment and clinical care for this increasingly rare breed. Ferreira and colleagues systematically validated the IDEXX ProCyte Dx analyser against manual differential counts and established precision benchmarks across intra-assay, inter-assay, carryover, and linearity parameters in this donkey population. The analyser demonstrated excellent performance overall, with coefficient of variation below 5% for most parameters (excepting basophils), negligible carryover across all parameters save platelets (5.88%), and exceptionally high linearity (Pearson r >0.99) for red cell indices, haemoglobin, white cell populations and platelet counts; comparison with manual methods showed strong agreement for haematocrit (Spearman rs=0.96) and good correlation for neutrophil (rs=0.84) and lymphocyte differentials (rs=0.90). This validation enables equine practitioners and donkey welfare specialists to confidently employ the ProCyte Dx for routine haematological assessment in the Asinina de Miranda breed, streamlining diagnostic work-up and facilitating population-level health monitoring for conservation efforts, though practitioners should remain mindful of basophil and platelet carryover limitations in clinical interpretation.
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Practical Takeaways
- •The ProCyte Dx analyzer can now be reliably used for routine hematology screening in Asinina de Miranda donkeys, improving efficiency of breed health monitoring programs
- •Results for basophils and platelets should be interpreted with caution or verified by alternative methods, as these parameters showed lower precision and carryover issues
- •This validation supports standardized hematological assessment protocols for this protected donkey sub-species, facilitating welfare studies and conservation breeding programs
Key Findings
- •ProCyte Dx hematology analyzer showed good intra-assay and inter-assay precision (coefficient of variation <5%) for most parameters in Asinina de Miranda donkeys, except basophils
- •Linearity analysis demonstrated very high Pearson correlation coefficients (>0.99) for erythrocytes, hematocrit, hemoglobin, leucocytes, and differential leukocyte counts
- •Excellent agreement observed for hematocrit (rs=0.96) and good agreement for neutrophils (rs=0.84) and lymphocytes (rs=0.90) when compared to manual methods
- •ProCyte Dx is appropriate for clinical use in Asinina de Miranda donkey hematology despite some parameters requiring further validation