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山东省自 196 2年发现有华支睾吸虫病以来 ,全省先后调查证实有 10 7个县 (市、区 )存在不同程度的流行 ,6 0～ 70年代人群感染率为 1. 5 1% ,乡村感染率为 1%～ 30 % ,85 . 7%的感染者为 15岁以下少年儿童 ,经过多年综合防治至 90年代人群感染率降至 0 . 3% ,91. 6 0 %的村感染率降至 1%以下 ,4 0 %的流行县未再查出感染者 ;81%的感染者为 2 1岁以上成年人。 80年代后 ,由于持续干旱少雨 ,75 %的沟渠、坑塘已断流干涸 ,90 %以上的河水受到污染 ,使华支睾吸虫中间宿主鱼、螺的生存条件和数量明显减少 ,鱼类感染虽比 70年代下降了 5 0多个百分点 ,但感染率仍在30 %左右 ,因 97. 9%的人改变了生吃或半生不熟的食鱼方式而减少了感染机会 ,山东省华支睾吸虫病的流行传播条件日渐减少 ,其流行范围逐渐缩小 ,人群感染率降到历史最低水平 (0 . 3% ) ,基本达到控制该病的目的。
Shandong Province has detected clonorchiasis since 1962, the province has investigated 10 107 counties (cities, districts) have been found in varying degrees of prevalence, population infection rate of 60-70 years was 1.51% , Rural infection rate was 1% ~ 30%, 85.7% of infected children under 15 years of age, after many years of comprehensive prevention and control to the 90’s population infection rate fell to 0.3%, 91.6% of the village infection The rate dropped to less than 1%, 40% of endemic counties did not detect any further infections, and 81% of those infected were adults 21 years of age or older. After the 1980s, 75% of ditches continued to be drier and less rainy, and pit ponds had been dried up. More than 90% of the rivers were polluted, which significantly reduced the living conditions and quantity of the intermediate host fish and snails of C. sinensis. Fish infections Although it dropped by more than 50% from the 1970s, the infection rate is still around 30%. 97.9% of people have changed their chances of eating raw or under-cooked fish. Shandong Clorothrix The prevalence of the epidemic was declining, and its prevalence was gradually reduced. The rate of infection in the population fell to the lowest level in history (0.3%) and basically reached the goal of controlling the disease.