Fragilidade osmótica dos eritrócitos de bovinos das raças holandesa, girolando e gir, criados no estado de São Paulo Erythrocyte osmotic fragility of bovine of Holstein, Gir/Holstein crossbreed and Gir breeds, raised in the State of São Paulo - Brazil

Abstract

Foi estudada a fragilidade osmótica dos eritrócitos (FOE) de bovinos das raças Holandesa, Girolando e Gir, criados no Estado de São Paulo, objetivando estabelecer os valores padrões de referência e determinar a influência de fatores raciais. Para isso, examinaram-se amostras de sangue de 210 fêmeas, 70 de cada raça. As amostras foram colhidas em 18 propriedades produtoras de leite, em condições semelhantes de manejo e de alimentação. Os resultados demonstraram significativas diferenças (pThe erythrocyte osmotic fragility (EOF) of bovine of Holstein, Gir/Holstein crossbreed and Gir breeds was studied, raised in the State of São Paulo/Brazil with the aim of establishing standard values of reference and determining the influence of breeding factors. In order to do this, the blood samples of 210 females, 70 of each breed were examined. The samples were collect from 18 milk producing establishments, under similar handling and feeding condictions. The results demonstrated significant differences (p<0.05) among the three studied breeds, the Holstein animals being the breed that presented the most fragile erythrocytes and those of the Gir breed the most resistent; the hybrids of the Gir/Holstein crossbreed presented intermediate values. The results were distributed in graphics and resented, numerically, in terms of 5, 50 and 95% of haemolysis.

Keywords

• fragilidade osmótica
• eritrócito
• bovino
• raças
• erythrocyte osmotic fragility
• bovine
• breeds