三峡库区人群白喉抗体水平调查分析

INVESTIGATION OF ANTIBODY LEVEL AGAINST DIPHTHERIA IN POPULATION LIVING IN THE AREA OF THREE GORGE RESERVOIR

采用锡克氏试验方法，对三峡库区秭归县的１０８８人的白喉抗体水平进行了调查。结果阳性率为２０．４０％，说明该县有７９．６０％的人群对白喉产生了免疫力，基本上形成了免疫屏障。从而预测白喉在三峡坝区之首的秭归仅可能发生散在病例，不会发生流行。本研究表明，自从实施计划免疫和冷链工作以来，有效地提高了小年龄组儿童的免疫力。今后应搞好计划免疫的工作。

For the purpose of investigating the immune status against diphtheria in population living in theThree Gorge Reservoir area,we proceeded in August and September of 1994 to detect diphtheria anti-body by using the Schick Test in part of the population aged from 9 months to 73 years old in threevillages of Zigui County,that located near the Reservoir.From a total of 1, 088 residents tested,Schick Test positive rate was 20.40%,so about 79.6%of the population had been immuned frommeasles,that made up a natural immune barrier to the disease.It was predicted that diphtheria epi-demic would not occur but sporadic cases might appear in the submerged area of Three Gorge Reser-voir.This study proved that since the implementation of expanded program on immunization and thecold chain task,the immunity in 9 months 3 years old children were well established,their SchickTest positive rate was 5. 62%. The survey suggested that in order to raise the immune level as awhole,the important measure is to carry out supplemental immunization,targeted at 2 years old,7years old children and women with birth ability.