title: Effect of impurities on the delayed neurotoxicity of O-(4-bromo-2,5-dichlorophenyl) O-ethyl phenylphosphonothioate administered orally to hens.
mesh_terms: D000818:Animals; D002645:Chickens; D004340:Drug Contamination; D005260:Female; D007306:Insecticides / Q000633:toxicity*; D010773:Leptophos / Q000633:toxicity*; D009422:Nervous System Diseases / Q000139:chemically induced*
chemical_list: D007306:Insecticides; D010773:Leptophos