肠线虫病在我国农村感染，发病率高，合理应用驱虫药对治疗肠寄生虫病十分必要。但是，药物中的特殊反应与药理作用无关，是不能预料的不良反应，少数病人可引起迟发变态反应，现报告3例咪唑类驱虫药引起的反应性脑炎。例1，患者男，40岁，因头晕，乏力10d，胡言乱语2d，于1994 Intestinal nematode infection in rural China, the high incidence of rational use of insect repellent on the treatment of intestinal parasitic diseases is necessary. However, the special reactions in the drug has nothing to do with the pharmacological effects, can not be expected adverse reactions, a small number of patients can cause delayed allergic reactions, are reported 3 cases of imidazole insecticide-induced reactive encephalitis. Example 1, male patient, 40 years old, dizzy, fatigue 10d, nonsense 2d, in 1994