上海市郊县流动人群动态与疟疾发病的关系初析

A PRIMARY ANALYSIS OF THE RELATIONSHIP BETWEEN THE DYNAMICS OF MOBILE POPULATION AND THE INCIDENCE OF MALARIA IN RURAL AREA OF SHANGHAI

上海市郊县疟疾年发病率已连续三年在1‰以下。血检人群疟原虫率为零。为了解本市郊县流动人群的动态及其是否对上海的疟疾发病产生影响,选择本市郊县的部分乡镇采用整群调查方法,调查1984年7月至1985年6月一年内流动人群量及流动人群中患疟疾的情况。疟疾流行季节6～10月的流量占总流量的41.5％。随机抽查流动人群血检疟原虫,发现间日疟阳性3例,原虫率为4.78‰。结果表明流动人群与疟疾有密切关系。

Mobile population mentioned in this paper is defined as people coming back from and going to other provinces endemic for malaria. In order to detect if the dynamics of the mobile population might influence the incidence of malaria in the rural area of Shanghai, a survey was made in 5 townships and 4 towns situated in four different locations with one in the center of the rural area during the period from July 1984 to June 1985, It was found that the number of the mobile population during the period from June to October(prevalent for malaria) was 41.5% of the total number of the whole year. Blood samples were randomly collected from the mobile population and 3 cases positive for P. vivax were detected, accounting for 4.78/10000 of the all persons examined. As the incidence of malaria was below 1/10000 and the blood samples collected were negative for malaria parasite in the rural area of Shanghai for the past three conse-cutive years, the result of this survey indicates that there is close rela-tionship between the mobile population and the incidence of malaria.