基本消灭班氏丝虫病后的远期监测

本文报道采用海群生对象治疗加流行村全民服药和对象治疗加食用海群生药盐基本消灭班氏丝虫病后的纵向和横向监测结果。两种不同措施基本消灭丝虫病后已监测9－11年，人群微丝蚴率均在逐年下降，前6年仍可检出残存微丝蚴血症者，以后连续5年未再发现微丝蚴阳性，蚊媒调查亦未发现幼丝虫自然感染，IFAT检测人群丝虫抗体阳性率为1．4－5．5％，降至非丝虫病流行区抗体水平，证明丝虫病的传播已被阻断。认为基本消灭班氏丝虫病后监测年限以10年左右为宜，并需连续3年以上未检出微丝蚴血症者和感染蚊，人群丝虫抗体阳性率降至当地非流行区水平，可以确认丝虫病已达到消除。

LONG-TERM SURVEILLANCE AFTER BASIC ELIMINATION OF BANCROFTIAN FILARIASIS

The longitudinal and cross-sectional systemic surveillance have been conducted for 9-11 consecutive years in six counties (cities) of Guangxi Zhuang Autonomous Region after basic elimination of bancroftian filariasis. The two different control regimens had been used with DEC selective treatment followed by mass treatment of all persons and selective treatment followed by taking DEC medicated salt. During the former 6 years, residual microfilaremia cases could still be detected ; whereas during the latter 5 years, no microfilaremia cases could be detected at all. The natural infection of vector mosquitoes showed negative. The positive rate of antibody in the populations was reduced to 1. 4 -5. 5% detected by IFAT,reaching to the level of local non-endemic areas. The result indicated that the transmission of filariasis in these areas has been blocked. The authors suggested that a period of 10 years might be appropriate for surveillance after basic elimination of bancroftian filariasis.