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Fecal DDA as a biomarker of DDT exposure in chickens

Despite the largely theoretical risks for human morbidity from exposure to DDT (p, p′-dichlorodiphenyltrichloroethane), the reality that it is inexpensive and highly effective in reducing morbidity and mortality from malaria vectors has encouraged its continued use. Here we present data indicating that domestic fowl are potentially excellent sentinel species for detecting possible human exposures to DDT. In addition to measuring residues of DDT in chicken blood or eggs, a potential alternate analyte indicative of recent DDT exposure is the definitive metabolic product DDA (2,2-bis(4-chlorophenyl)acetic acid) in feces.