1977年12月至1978年5月,当流脑流行前期,流行期和流行后期,我们对市、郊区7—9岁388名儿童进行了流脑的带菌率调查,结果如下:一、健康人群流脑带菌群率与菌群分布:1977年12月和1978年3、5月,连续对388名健康儿童进行了三次带菌调查(见表).流行期带菌率为56.44%,显著高 From December 1977 to May 1978, when the meningococcal pre-epidemic, epidemic and post-epidemic period, we carried out a survey on the incidence of meningitis in 388 children aged 7-9 in the city and suburbs. The results are as follows: 1. Healthy people The rate and flora distribution of meningococcal flora: In December 1977 and March and May 1978, 388 healthy children were consecutively investigated for three times (Table). The prevalence was 56.44%, which was significantly higher