安徽省人体肠道蠕虫感染现状分析

目的掌握安徽省人体重要寄生虫病流行现状。方法按照全国统一方案，以分层整群随机抽样法调查安徽省10个抽样县(市)，29个土源性线虫调查点，每个点检查500人。采用改良加藤厚涂片法检查肠道蠕虫卵；试管滤纸培养法鉴定钩虫虫种及其它线虫幼虫；透明胶纸肛拭法检查全部12岁以下儿童蛲虫卵。结果．共调查14874人。检出肠道蠕虫13种。总感染率为21．43％，(其中男性19．63％，女性23．37％)，蛔虫、钩虫和鞭虫占全部感染者的91．28％，其中蛔虫、鞭虫和钩虫感染率分别为9．77％、3．14％和9．65％，华支睾吸虫为0．67％(100／14874)；蛲虫阳性率为5．39％(163／3022)；蛔虫和鞭虫感染沿江平原最高，钩虫和华支睾吸虫感染淮北平原最高。结论与我省第一次寄生虫病分布调查相比，发现虫种减少，总感染率及各虫种感染率均大幅度下降。老年龄组的感染率相对较高(尤其是女性)，老年人群在过去的防治中未得到应有的重视。

Analysis on Current Status of Human Intestinal Helminth Infections in Anhui Province

Objective To understand the current status of human intestinal helminth infections and their characateristic feature in rural areas of Anhui Province. Methods According to the methods of national investigation scheme, 29 sampling sites were selected from 10 counties via stratified and clustered random sampling. Modified Kato-Katz thick smear and filter paper fecal culture in test tube methods were applied to identify intestinal helminthes eggs and larvae. The Enterobius vermicularis egg of children aged lower 12 was examined by cellophane anal swab technic. Results A total of 14 874 persons were investigated and 13 species of intestinal helminthes were detected out. The average infection rate was 21.43%(3 187/14 874). The female infection rate (23.37%) was higher than that of male (19.63%)(P<0.05). 91.28% of the infections were infected with Ascaris lumbricoides, Trichuris trichiura and hookworm. The infection rates of major intestinal helminthes were as follows: Ascaris lumbricoides 9.77%, Trichuris trichiura 3.14%, hookworm 9.65%, Enterobius vermicularis 5.39% (163/3 022) and Clonorchis sinensis 0.67% (100/14 874). The infection rates in different age-groups ranged from 19.08%~22.99%. The highest infection rates in southern plain region were ascaris and tapeworm while in northern plain region hookworm and Clonorchis sinensis. Conclusion The infection rate and the infected species of human intestinal helminthes in Anhui Province decreased remarkably as compared with that in first investigation 10 odd years ago. The infection rate in persons over 60 years (especially in females) was relatively higher indicating these persons were neglected in the past control program.