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

• Main Author: Silva,M.O.
• Publication Date: 2019
• Other Authors: Ribeiro Filho,J.D., Dantas,W.M.F., Valente,F.L., Ribeiro,B.M., Ermita,P.A.N., Monteiro,L.C., Costa,C.M., Silva,G.M.M., Alves,S.R., Avanza,M.F.B., Santos,P.V.M., Manso Filho,H.C.
• Format: Article
• Language: eng
• Source: Arquivo brasileiro de medicina veterinária e zootecnia (Online)
• Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601765
• topic: equine; blood count; lactation; pregnancy; peripartum

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.