Hillenweck A, Corpet DE, Killeen JC, Bliss M, Cravedi JP. Urinary and biliary metabolic patterns of chlorothalonil in germ-free and conventional rats.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 1999;
47:2898-2903. [PMID:
10552583 DOI:
10.1021/jf9811469]
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Abstract
The metabolic fate of chlorothalonil, a broad spectrum fungicide that is known to be metabolized via glutathione conjugation, was examined through the analysis of urine and bile metabolites. The role of digestive microflora in the metabolism of chlorothalonil was assessed by comparing the metabolic patterns in germ-free and conventional rats. Low urinary and biliary excretion of radioactivity was observed in both conventional and germ-free rats. However, the urinary excretion of radioactivity was higher in conventional than in germ-free rats. Radio-HPLC analysis of urine and bile showed a complex metabolic profile in both conventional and germ-free rats. Methylthio metabolites of chlorothalonil were determined in ethyl acetate extracts of urine and bile of conventional and germ-free rats. These metabolites were excreted in a higher amount in the urine of conventional rats than in the urine of germ-free rats. This study shows the complexity of chlorothalonil metabolism and the role of the digestive microflora in chlorothalonil metabolism.
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