Abstract
Vegetable contamination by pesticides presents current problem of public health. Previous studies have shown that 60% vegetables sampled collected in Lome (Togo) have pesticide residues exceeding the tolerable limits. Because mancozeb, ethylene bis-dithiocarbamate, is mainly used, more than five times, during the growth of lettuce ( Lactuca sativa ), the aim of the present investigation is to evaluate the potential effect of mancozeb-treated lettuce on the rat liver physiology. Mancozeb-treated lettuce and two doses of mancozeb were administered during 28 days to rats. Along the study, animal behavior was assessed, and at the end of administration, some hepatic enzymes such as transaminases and alkaline phosphatase were studied. The decrease in rat body weight was noted and animals have soft feces. Plasmatic concentrations of transaminases, alkaline phosphatase, and total bilirubin are increased in rats administered with mancozeb-treated lettuce. The plasmatic concentration of total protein is not decreased significantly. Those results indicate that lettuce collected directly from gardens, without washing or less washed, are not fit for human consumption. Keywords: Lettuce, mancozeb, toxicity, liver, pesticide residues, public health
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