Perfil hematológico do cavalo da raça marajoara (Eguus caballus), criados no estado do Pará.

Abstract

The Marajoara breed of horse, a species bred mainly on the Marajó Island and many other regions of the state of Pará, constitutes a herd estimated at over 150,000 head. It has been recognized as a breed by the M.A. since 1980, with a breed standard recognized by the National Horse Breeding Commission. Service animals, easily trained for the arduous daily work in the fields of Marajó and the entire Amazon region. In a search of the available literature, nothing was found about the normal hematological parameters. The objective of the present research is to establish the hematological profile for this breed under Amazonian conditions. Twenty-five adult animals, male and female foals, had their blood collected by venipuncture and stored in flasks containing 10% EDTA to determine erythrometric and leukometric values. Hemoglobin was measured using the cyanometahemoglobin method with spectrophotometer reading at 540 nm. The hematocrit was determined by the microhematocrit method. The May-Grünwald Giemsa stain was used for the differential leukocyte count. The results in mean values with the respective standard deviations obtained for the samples were: RBC 5.562.700 +/: 1.912.500/mm3; Hemoglobin 14,24 +/- 1,92 g%; Hematocrit 31,00 +/ : 3,65 %; Leukocytes 8.990 +/- 2. 180/mm3; Differential: Myelocytes 0.0% ; Metamyelocytes 0.0% ; Bastions 0.54 +/ : 1.33 % ; Segmented 39.68 +/- 12.91 % ; Eosinophils 3.86 +/- 1.69 % ; Basophil 0.45 +/- 0.80 %; Monocytes 4.04 +/- 3.57 %; Lymphocytes 45.81 +/- 8.77 %.