近年来,随着食品卫生状况的改善,食物中毒的病因构成发生了较大的变化,化学性食物中毒发生起数和死亡人数在食物中毒中所占比例逐年增高。2002年9月14日发生在南京汤山的毒鼠强中毒事件,造成200余人中毒,42人死亡;2003年2月12日发生在四川省什邡市的毒鼠强中毒事件,导致20人中? In recent years, with the improvement of food hygiene, the cause of food poisoning has undergone major changes. The incidence of chemical food poisoning and the proportion of deaths in food poisoning have increased year by year. On April 14, 2002, a tetramine poisoning incident occurred in Tangshan, Nanjing, resulting in poisoning of more than 200 people and 42 deaths. In February 20, 2003, a case of tetramine poisoning occurred in Shifang City, Sichuan Province, resulting in 20 people becoming poisoned.