“八五”期间海南省丝虫病流行动态的监测

SURVEILLANCE ON EPIDEMIOLOGICAL TRENDS OF FILARIASIS IN HAINAN FROM 1991 TO 1995

海南省基本消灭丝虫病后，“八五”期间继续开展病原、蚊媒和血清学的监测，显示残存微丝蚴血症者大部分在1－4年内转阴，最长持续8年。人群微丝蚴率和微丝蚴密度持续逐年下降并自1993年起来再发现微丝蚴血症者。平均人群丝虫抗体阳性率为2．17－9．12％，抗体滴度为1：20．8－1：25．2，接近非丝虫病流行区健康人群水平。主要传播媒介致倦库蚊1992年以后解剖检查，纵向监测解剖1027只，横向监10个点解剖8370只，均未发现幼丝虫自然感染蚊。因此认为，海南省基本消灭丝虫病的成果是巩固的，残存传染源已趋向自然净化，丝虫病的传播已被阻断。鉴于“八五”期间，外省流行区向海市输入传染源，今后继续查找薄弱环节，消除残存疫点的同时，应加强外省来琼流动人口的管理和监测，严防传染源的输入，消除可能引起的潜在传播。

During 1991 to 1995, parasitological,entomological and serological surveillance was carried out after filariasis had been basically eradicated in Hainan province. The results revealed that the most remaining microfilaremia cases became negative within 1 to 4 years and that the microfilaria rate and microfilaria density consecutively declined.year by year. Since 1993, no microfilaria cases were found. The average antibody positive rate ranged from 2. 17 to 9. 12%, antibody titre ranged from 1: 20. 8 to 1: 25. 2,which was close to that in nonendemic areas. Since 1992, 1027 culex pipiens quinquefascidtus were dissected in longitudinal surveillance and 8370 were dissected in cross sectional surveillance, but no natural filarial infection was found. Authors concluded that the achievement of basical eradication of filariasis in Hainan was affirmed,the transmission of filariasis in Hainan has been interrupted. For it is possible that the source of infection was imported from other areas, we should enhance management and surveillance on mobile population to prevent the source of infection from importing and to avoid the potential possibility of transmission.