Albinism and Blood Cell Profile: The Peculiar Case of Asinara Donkeys.
Authors: Cappai Maria Grazia, Senes Alice, Pilo Giovannantonio
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: Albinism and Blood Cell Profile in Asinara Donkeys Researchers compared complete blood cell counts between 8 albino Asinara donkeys (oculocutaneous albinism type 1) and 7 grey-coated Sardo donkeys, all maintained under identical management and dietary conditions in Mediterranean summer conditions, to investigate whether the genetic albinism trait influences haematological parameters. Blood samples were analysed via automated haematology analyser within two hours of collection, with results compared using one-way ANOVA. The Asinara donkeys demonstrated significantly elevated red blood cell counts (5.19 versus 3.80 × 10¹²/mL; p = 0.017) alongside smaller individual cell diameter, increased anisocytosis, and lower hematocrit values—all remaining within normal physiological ranges—suggesting a distinctive erythrocyte profile associated with the OCA1 albinism phenotype during peak photoperiod exposure. Both breeds remained clinically healthy, though Sardo donkeys exhibited mild eosinophilia. These findings warrant consideration by equine professionals managing albino donkeys, particularly regarding baseline haematological interpretation and potential seasonal variation in blood profiles, though the clinical significance of this peculiar red cell pattern requires further investigation across different seasons and larger populations.
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Practical Takeaways
- •Albino donkeys demonstrate a distinct hematological profile with elevated RBC counts; baseline CBC reference ranges may need breed-specific adjustment for albino equines
- •The peculiar red blood cell traits in albino donkeys appear photoperiod-dependent, suggesting seasonal monitoring may be relevant for clinical assessment during summer months
- •Veterinarians working with albino donkeys should interpret higher RBC counts and lower hematocrit as potentially normal breed traits rather than pathological findings
Key Findings
- •Asinara albino donkeys displayed significantly higher RBC counts than gray-coated Sardo donkeys (5.19 vs. 3.80 × 10¹²/mL, p = 0.017)
- •Albino donkeys showed smaller RBC diameter with higher anisocytosis compared to non-albino controls
- •Albino donkeys had lower hematocrit values within physiological ranges despite higher RBC numbers
- •Mild eosinophilia was observed in gray-coated Sardo donkeys during the positive photoperiod in June