摘要
目的 探索人群微丝蚴率降至 1%以下 ,终止防治措施后人群和媒介感染情况。方法 终止防治措施后 ,1988～ 2 0 0 0年在原广东省班氏丝虫病流行区抽查 30 %以上流行镇 ,重点村居民夜间采血 12 0 μl血检微丝蚴 ,在血检点捕集致倦库蚊解剖 ,观察自然感染情况 ;选定 10个县原丝虫病流行较严重的村 ,纵向观察人群和媒介感染情况。结果 1988年人群微丝蚴率为 0 33% (5 75 /172 6 31) ,此后人群微丝蚴率和致倦库蚊自然感染率逐年下降 ,1997年后无微丝蚴血症者 ;1992～ 2 0 0 0年共解剖致倦库蚊 2 4 8115只 ,无发现自然感染幼丝虫 ;1988～ 1995年纵向观察 ,1988年人群微丝蚴率和蚊自然感染率分别为 0 14 %和 0 0 7% ,1994年后两者均为 0。结论 班氏丝虫病经防治后 ,人群微丝蚴率降至 1%以下则可阻断传播 ,10年后人群微丝蚴血症消失。
Objective To explore the filarial infection rate in human and vector after the filariasis control stopped in which the microfilarial rate less than 1%. Methods Blood sample in residents and Culex quinquefasciatus were collected to examine the natural filarial infection rate in 30% epidemic townships in 1988-2000. Longitudinal observation in both human population and vector was carried to test the infection level in ten severe epidemic counties. Results Microfilarial rate in human dropped from 0.33% in 1988 to 0% since 1997 and the rate in vector has dropped to 0% since 1994. Conclusion The bancroftian filariasis transmission can be interrupted when the microfilarial rate in human population has dropped to less than 1% and the microfilarial rate can reach zero after 10 years.
出处
《华南预防医学》
2004年第5期11-13,共3页
South China Journal of Preventive Medicine
关键词
吴策线虫
班氏
库蚊属
微丝蚴
感染
Wuchereria bancrofti
Culex
Microfilaria
Infection
