Arquivo Brasileiro de Medicina Veterinária e Zootecnia (Dec 2019)

Hematological and biochemical profiles of Mangalarga Marchador mares in the transition period bred on pasture

  • M.O. Silva,
  • J.D. Ribeiro Filho,
  • W.M.F. Dantas,
  • F.L. Valente,
  • B.M. Ribeiro,
  • P.A.N. Ermita,
  • L.C. Monteiro,
  • C.M. Costa,
  • G.M.M. Silva,
  • S.R. Alves,
  • M.F.B. Avanza,
  • P.V.M. Santos,
  • H.C. Manso Filho

DOI
https://doi.org/10.1590/1678-4162-11142
Journal volume & issue
Vol. 71, no. 6
pp. 1765 – 1772

Abstract

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ABSTRACT The present study aimed to evaluate the effects of the transition period on hematological and biochemical constituents in Mangalarga Marchador mares. Forty-eight mares were used to form a maintenance group (MG) and transition group (TG), formed by pregnant mares and, after delivery, infants. Blood samples were collected at the following times: T-60 (60 d pre-delivery), T-30 (30 d pre-delivery), T-15 (15 d pre-delivery), T0 (first 6h post-delivery), T15 (15 d post-delivery), T30 (30 d post-delivery), and T60 (60 d post-delivery). The TG had lower values (P< 0.05) of red blood cells, hematocrit and hemoglobin at T0, T15, T30 and T60 times than MG. The mean corpuscular volume was lower in MG (P< 0.05) than in TG (T0, T15, T30 and T60) and mean corpuscular hemoglobin concentration was higher (P< 0.05) in MG than in TG (T15, T30 and T60). On the other hand, the diameter distribution of red blood cells presented a lower value (P< 0.05) in MG than in TG (T15 and T30). Mares in transition period presented regenerative anemia. The results demonstrate physiological metabolic variations of different intensities during pregnancy, delivery and early lactation.

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