Intervalos de referência sanguíneos e a influência da idade e sexo sobre parâmetros hematológicos e bioquímicos de ovinos da raça Santa Inês criados na Amazônia Oriental

Abstract

Blood count and biochemical tests are used to diagnose diseases in domestic animals. These tests can be influenced by age, gender, nutrition, breed, species and environmental conditions. Thus, data from one region should not be extrapolated to animals raised in other regions. The objective of this study was to determine the hematological and biochemical values of different ages and genders of Santa Inês sheep, raised in the eastern Amazon. There were examined 91 sheep that were assigned to three groups: G1 (three to six months old, n = 31); G2 (seven to 24 months old, n = 30) and G3 (above 24 months old, n = 30). The blood cell count, white blood count and biochemical determinations were made with an automatic counter and a semi-automatic analyzer, respectively. Mean values were compared using the Tukey test. The number of erythrocytes, the red blood indices, the thrombogram, eosinophils, total protein, urea and creatinine concentrations were influenced by the age of the animals. The erythrocyte coefficient of variation and the creatinine concentration were influenced by gender, and were greater in males. The neutrophil:lymphocyte (N:L) ratio was greater than one for all age groups. This study led to the determination of reference values for sheep raised in the Eastern Amazon and demonstrated that when interpreting hematological and biochemical tests of sheep, age and gender must be considered.