Resumen

SANDOVAL, Espartaco et al. Morphological classification of anaemia in dual purpose cattle breeding in a forest dry tropical zone. Zootecnia Trop. [online]. 2010, vol.28, n.4, pp.535-544. ISSN 0798-7269.

The objective of this work was to determine the prevalence of different morphological anemia types and its classification in bovine dual purpose, as well as to establish its relation with the exploitation system, the age and the sex of the animals. It was carried out within October and November, normally associated to the end of rainy period, in 383 bovine coming from six farms characterized with system 1: dual purpose tendency to the milk specialization (DPTL) and 2: dual purpose tendency to the meat production (DPTC). The animals were grouped chronologically in two classes: A < 2 years and B 2-10 years. Samples from blood were obtained from the jugular vein using vacutainer tubes with EDTA as the anticoagulant. Concentration of hemoglobin, packed cell volume, erythrocytes, mean corpuscular volume and mean corpuscular hemoglobin was evaluated. Data were analyzed by chi-square with a probability of 5%. Results indicate that there is a high prevalence of anemia (56,3%) with predominance of the hipochromic microcytic, followed of the normochromic normocytic and in smaller proportion the macrocytic. The percentage of anemic animals are different (P< 0,05) being superior in system DPTC, the animals between 2-10 years and in the females. It is discussed the influence of sanitary, physiological and nutritional situations. As a conclusion, conditions as the exploitation system, sex and the age are associated to the presence of anemia.

Palabras clave : anemia; bovine; production system; sex; age.

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