Abstract

In continuing our studies on the effects of fluoride (F) on the toxicity of pesticides, we investigated the interaction of 1 ppm and 10 ppm F in the drinking water of rats orally administered 1 and 10 mg chlorpyriphos/kg bw/day, alone and in combination for 28 days. Changes in antioxidant parameters, along with protective effects of vitamins C, and E, were examined. Effects on superoxide dismutase, catalase, glutathione S transferase, glutathione peroxidase, glutathione, and lipid peroxidation were measured in the blood. Significant (p<0.05) alterations in these antioxidant indices were observed with repeated exposure of the rats to both toxicants alone and more so in combination. However, simultaneous oral administration of the antioxidant vitamins C and E in amounts of 60 and 100 mg/kg bw/day, respectively, afforded only partial protection against the subacute toxicity of F and chlorpyriphos alone and in combination.

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