Influência da gestação nos valores hematológicos de vacas da raça bonsmara lactantes de 1ª a 3ª lactação e não lactantes

Abstract

Hematology has great importance as a semiological procedure, it helps veterinarians to establish diagnoses, prognosis and monitor the treatment of diseases that affect domestic animals. The gestation period and lactation are the most important stages in the life of bovine females that affect metabolism and can alter hematological parameters. The aim of this study was to evaluate the effects on hematological variables of pregnant and nonpregnant cows, lactating from 1st to 3rd lactation and non-lactating cows. Blood from 119 Bonsmara cows were used, including only animals in good nutritional condition and apparently healthy. Haematological assessments (erythrogram and leukogram) were performed on automated equipment. For the erythrogram were evaluated: globular volume, hematimetry, hemoglobinometry, average corpuscular volume, mean corpuscular hemoglobin concentration, range of distribution of red blood cells, platelet count, average platelet volume and leukometry. In the leukogram, the leukocyte count was performed in blood extensions stained by the May-Grüwald-Giemsa method, where 100 cells were identified and counted and the relative leukocyte formula was established, through which the absolute leukocyte values were calculated (Absolute leukocyte formula). Descriptive statistical analysis of the data was carried out, with a 5% significance level. The data obtained here compared to the applied methodology, demonstrate that there were no significant changes (p <0.05) between pregnant and non-pregnant cows, lactating cows from 1st to 3rd lactation and non-lactating Bonsmara breed.