Objective To analyze the immunization levels of measles among the healthy populations in Jiangsu Province, and grasp the epidemiological characteristics of measles and the seroprevalence of antibody to measles so as to explore the countermea- sures for preventing and controlling measles. Methods According to different ages and regions, we analyzed the data on mea- sles antibody levels among healthy populations in Chuzhou District of Huaian City, Pukou District of Nanjing City and Wnjin Dis- trict of Changzhou City from 2009 to 2011. Results A total of 3,435 serum samples were tested for measles antibody and the overall sero positive rate of measles antibody was 93.16%. The sero- positive rate of the group under 1 year of age was lower, wihiie the sero- positive rates of the groups aged ≥ 8 - month were all over 90%. The titers of antibody against measles vires in the three districts showed a downward trend in recent years, of which the anti measles virus antibody titer in the sera of vacein- ees in Huaian in 2009 was the highest （1,970.90） and the titer in the sera of vaccinees in Changzhou in 2011 was the lowest （595.97）. Conclusions The sero - positive rate of measles antibody and measles antibody levels among different age popula- tions in different districts of Jiangsu Province fluctuate within the normal ranges. Though the titers of antibody against measles virus show a downward trend in recent years, the high prevalence of imnmnity to measles effectively decreases the incidence of measles.
Practical Preventive Medicine