山东省华支睾吸虫病分布及流行趋势分析

Analysis of distribution and prevalent tendency of clonorchiasis sinensis in Shandong Province

目的了解山东省华支睾吸虫病分布范围及流行趋势,为制定下一步防治策略提供科学依据。方法采用改良加滕厚涂片(Kato-Katz)法粪检华支睾吸虫卵。收集既往资料与现场调查数据作统计分析。结果1987年前全省107个县有华支睾吸虫病流行,受威胁的县为77%(107/139)。人群平均感染率1.5%,感染人数约113万。经40余年的综合防治,至2003年华支睾吸虫人群平均感染率下降为0.06%,下降了96.0%。流行县由原来的107降为51个,受威胁的县下降为36.7%,较前下降了52.3%。感染者由113万下降为5万人左右。轻度感染者由原来的63.7%上升为88.2%。结论山东省华支睾吸虫病流行范围呈逐渐缩小,受威胁人口数逐年下降;人群平均感染率降到历史最低水平,88.2%的感染者为轻度感染,基本达到控制传播流行。

Objective To understand the distribution and endemic tendency of clonorchiasis in Shandong Province and provide scientific evidences for controlling the disease Methods The method of kato - katz was used to examine the clonorchis sinensis ova in stool. The data concerning the control of clonorchiasis sinensis were collected and analyzed. Results There were 107 counties prevalent with clonorchiasis sinensis in Shandong Province before 1987 year. The infection rate of population was 1.51%. The infected counties were 77% and totally 1130 000 people were infected. After a control of 40 years the infection rate of clonochis sinensis in population reduced from 1.51% to 0.06%, a drop of 96% .The numberof oountries prevalent with the disease reduced from 107 to 51 ; the numbers of counties at risk reduced from 77% to 36,7%, a drop of 52,3%. The number of infections reduced from 1 130 000 to 50000 .While the number of people with light infection increased from 63.7% to 88.2%. Conclusion The prevalent areas of clonorchiasis sinensis is reducing gradually, and the number of people at risk is on the decreasing year by year. The average infection of the clonorchiasis sinensis is at the lowest level and 88.2% of the infections were light infection. The goal of controlling the transmission of clonorchiasis sinensis has been achieved basically in Shandong Province.