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  • Title: Indicators of lead, zinc and cadmium exposure in cattle. I. Results in a polluted area.
    Author: Milhaud GE, Mehennaoui S.
    Journal: Vet Hum Toxicol; 1988 Dec; 30(6):513-7. PubMed ID: 3245111.
    Abstract:
    Dairy cattle on a farm located in the vicinity of a lead and zinc-ore processing factory were studied over 21 mo and compared with cattle on a control farm. Mean daily intakes of lead from the diet were 4.3 mg/kg body weight, with great variations; mean daily zinc intakes were 5.6 mg/kg body weight; and mean daily cadmium intakes were 0.064 mg/kg body weight. The 3 major indicators of contamination were blood lead concentrations, with mean values of 50 micrograms/100 ml of blood, zinc protoporphyrin with mean values of 165 micrograms/100 ml blood, and lead concentrations in hair which averaged 10 micrograms/g. Blood zinc concentrations and zinc concentrations were not significantly increased. One cow developed fatal post-partum paralysis. Liver, kidney and bone lead concentrations and kidney cadmium concentrations were good "post-mortem" indicators of exposure.
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