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Year 1998 - Volume 18, Number 3
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Evaluation of zinc, manganese and iron levels in liver samples of cattle and sheep from various regions of Brazil, 18(3/4):107-110
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ABSTRACT.- Moraes S.S. 1998. [Evaluation of zinc, manganese and iron levels in liver samples of cattle and sheep from various regions of Brazil.] Avaliação das concentrações de zinco, manganês e ferro no fígado de bovinos e ovinos de várias regiões do Brasil. Pesquisa Veterinária Brasileira 18(3/4):107-110. Centro Nacional de Pesquisa de Gado de Corte, Embrapa, Cx. Postal 154, Campo Grande, MS 79002-970, Brazil.
To complement studies on diseases of cattle and sheep possibly caused by mineral deficiencies, liver samples collected· in several regions of Brazil and which had been analysed for copper and cobalt were now analysed for zinc, manganese and iron. In most regions the levels of zinc were only sporadically low. Only in the States of Ceará and Piauí a greater number of samples had low levels of this mineral, suggesting the occurrence of zinc deficiency, but subclinically, as case histories and clinical pathological studies did not indicate the occurrence of this deficiency. Also the values for manganese were sporadically Iower than those considered normal. Only in the States of Rio de Janeiro (southern part), Espírito Santo (northern part), Ceará (Serra da Ibiapaba) and Amapá, there was a greater incidence of low values of manganese; the sarne reasons mentioned for zinc indicate that deficiency of manganese in these regions occurs subclinically.
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