有机磷中毒患者.ppt

农农药药中中毒毒 Pesticide intoxicant Pesticide intoxicant 概概述述??农药农药( ( pesticide pesticide ): ): 指农业生产中用于消灭、控制有害动植物指农业生产中用于消灭、控制有害动植物(害虫、病菌、鼠类、杂草等)和调节植(害虫、病菌、鼠类、杂草等)和调节植物生长的各种药物。物生长的各种药物。 What is a pesticide? What is a pesticide? ?? A pesticide is any substance or mixture of A pesticide is any substance or mixture of substances intended for: substances intended for: preventing, preventing, destroying, destroying, repelling, or mitigating any pest. repelling, or mitigating any pest. ?? Though often misunderstood to refer only to Though often misunderstood to refer only to insecticides, the term pesticide also applies to insecticides, the term pesticide also applies to herbicides, fungicides, and various other herbicides, fungicides, and various other substances used to control pests. substances used to control pests. Acute toxicity Acute toxicity ?? Acute toxicity Acute toxicity of a pesticide refers to the of a pesticide refers to the effects from a single exposure or repeated effects from a single exposure or repeated exposure over a short time, such as an accident exposure over a short time, such as an accident during mixing or applying pesticides. Various during mixing or applying pesticides. Various signs and symptoms are associated with acute signs and symptoms are associated with acute poisonings. poisonings. ?? A pesticide with a high acute toxicity can be A pesticide with a high acute toxicity can be deadly even if a small amount is absorbed. It deadly even if a small amount is absorbed. It can be measured as acute oral toxicity, acute can be measured as acute oral toxicity, acute dermal toxicity or acute inhalation toxicity. dermal toxicity or acute inhalation toxicity. chronic poisoning effects chronic poisoning effects ?? Carcinogenicity--ability to produce cancer or to assist Carcinogenicity--ability to produce cancer or to assist carcinogenic chemicals. carcinogenic chemicals. ?? Mutagenicity