我县自1981年接种流脑菌苗以来,流脑发病率大幅度下降,为了有效的控制流脑,现将接种流脑菌苗前后流脑流行病学特征分析如下。1956～1980年,全县共发生流脑6724例,平均年发病率92.59/10万,死亡249例,年均死亡率3.43/10万,病死率3.70%。发病高峰为1～4月份,占全年病例的88.01%,具有明显的冬春季节性。发病年龄以青少年和儿童为主,男女性别比为1.08:1。人群带菌率调查为11.31%,以B群为主。1981～1990 Mycobacterium inoculum since 1981, the incidence of meningitis dropped significantly, in order to effectively control meningitis, meningitis is vaccinated before and after the meningitis epidemiological characteristics are analyzed as follows. 1956 ~ 1980, the county a total of 6724 cases of meningitis, the average annual incidence rate of 92.59 / 100 000, 249 deaths, the average annual death rate of 3.43 / 100 000, fatality rate 3.70%. Peak incidence of 1 to 4 months, accounting for 88.01% of the annual cases, with a clear winter season. The age of onset was mainly adolescents and children with a sex ratio of 1.08: 1. Infection rate of population survey was 11.31%, with B group as the main. 1981 ~ 1990