Harm of pesticides to human body and protective measures

Summer is a season when crops, vegetables and fruit trees are vulnerable to pests, and it is also a season for farmers to spray pesticides. However, due to too much bare skin and limbs and open pores, when farmers spray pesticides, pesticides are more likely to penetrate into the body through breathing and suspended pesticide particles through the skin, leading to poisoning< The harm of spraying pesticides to human body can be divided into three levels: acute poisoning, chronic harm and "three causes" 1. Acute poisoning pesticides enter the human body by mouth, inhalation or contact, and the acute pathological reaction in a short time is acute poisoning. Acute poisoning often causes a large number of individual deaths and becomes the most obvious pesticide hazard2. Chronic harm long term contact with or consumption of food containing pesticides can make pesticides accumulate in the body and pose a potential threat to human health. Pesticide is accumulated continuously in human body. Although it will not cause obvious acute poisoning symptoms in a short time, it can cause chronic harm and damage the normal function of nervous system. Although the chronic harm of pesticides can not directly endanger human life, it can reduce human immunity, thus affecting human health, resulting in the occurrence of diseases< 3. Carcinogenesis, teratogenicity and mutagenicity at present, China has issued five batches of standards for the safe use of pesticides, which stipulates that 10 kinds of pesticides are prohibited to be used in agriculture. Among them, dibromochloropropane (carcinogenic), dibromoethane (causing animal or human deformity) and Chlordimeform have potential carcinogenic threat to human and carcinogenic effect on animals< Second, the main way of pesticide poisoning is through respiratory tract and skin penetration< Respiratory tract: when spraying and fumigating pesticides, or when using some volatile pesticides, they can be inhaled into human body through respiratory tract. The pesticide particles with larger diameter can not directly enter the lung, but are blocked in the nose, mouth, throat or trachea, and absorbed through these surface mucosa; Only the pesticide particles with a diameter of 1-8 μ M can enter the lung directly and be quickly and completely absorbed into the body

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