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Platelet concentration and hemoglobin function in greyhounds

P S Sullivan1, H L Evans, T P McDonald

  • 1Department of Animal Science, College of Veterinary Medicine, University of Tennessee, Knoxville 37901-1071.

Journal of the American Veterinary Medical Association
|September 15, 1994
PubMed
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Greyhounds exhibit distinct hematologic profiles compared to other dogs, featuring higher hemoglobin and packed cell volume, suggesting enhanced oxygen-carrying capacity potentially due to hemoglobin

Area of Science:

  • Veterinary Medicine
  • Comparative Hematology
  • Canine Physiology

Background:

  • Greyhounds are selectively bred for racing, potentially influencing their physiological traits.
  • Understanding breed-specific hematologic characteristics is crucial for canine health assessment.

Purpose of the Study:

  • To compare the hematologic characteristics of Greyhounds with non-Greyhound controls.
  • To investigate potential reasons for observed differences, including hemoglobin-oxygen affinity.

Main Methods:

  • Hematologic parameters were measured in 36 Greyhounds and 22 non-Greyhound controls.
  • Ehrlichia canis and Babesia canis serostatus was determined in a subset of Greyhounds.
  • Hemoglobin-oxygen binding characteristics (P50, Hill coefficient) were assessed.

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Main Results:

  • Greyhounds had significantly higher mean hemoglobin concentration, packed cell volume (PCV), mean corpuscular volume (MCV), and mean cellular hemoglobin (MCH).
  • Greyhounds exhibited lower mean red blood cell (RBC) count, hemoglobin P50 value, Hill coefficient, platelet count, and total plasma protein.
  • Lower P50 values in Greyhounds indicate a higher affinity of their hemoglobin for oxygen.

Conclusions:

  • Greyhound hematology differs significantly from non-Greyhounds, with evidence of enhanced oxygen-carrying capacity.
  • The observed differences, particularly lower P50 values, suggest a greater intrinsic oxygen affinity of Greyhound hemoglobin, beyond selective breeding for racing.
  • These findings have implications for interpreting hematologic data in Greyhounds and understanding canine adaptation.