西昌邛海湖周边地区居民血吸虫病调查研究

INVESTIGATION ON SCHISTOSOMIASIS IN INHABITANTS LIVED AROUND QIONGHAI LAKE,XICHANG CITY

目的 了解西昌市血吸虫病目前的流行现状 ,为制定防治策略提供依据。方法 采用 3送3检尼龙袋集卵孵化法和 Kato- Katz法对邛海湖周边地区的 2 0个自然村居民进行血吸虫感染率和感染度的调查。结果 检查 5 - 6 0岁居民 3415人 ,血吸虫感染率为 2 8.81% ,病人 EPG为 36 .0 7。各年龄组中 ,15 - 19岁组感染率最高 ,达 36 .0 2 % ,病人感染度 (EPG)以 5 - 9组最高 ,为 4 1.96 ,5 - 9岁、2 5 - 2 9岁、30 - 34岁 3个年龄组 IPC及 RIPC均高于其他年龄组 ;男女性别感染率及感染度无明显差异。文化程度及家庭经济收入高的血吸虫感染率低。种植烟草、蔬菜的居民感染率分别为72 .4 6 %和 4 9.5 3% ,高于其他职业人群。阶、梯地居民感染率及感染度明显高于平坝地区。结论 该地区血吸虫病流行仍较严重 ,居民感染率及感染度均高。血吸虫感染与当地居民的文化程度、家庭收入有密切关系 ,从事经济作物种植的居民感染率明显高于其它职业者。

Objective To find out schistosomiasis endemic trend in Xichang City in order to get the basis for control strategy. Methods Twenty villages were sampled from 196 villages of 4 townships around Qionghai Lake by stratified sampling method. Inhabitants aged 5-60 years old were examined by miracidia hatching test after egg concentration with a nylon tissue bag (3 samples and examined 3 times/person) and by Kato Katz method. Results The schistosome infection rate was 28 81% and EPG 36 07. The infection rate and intensity varied in different age groups. The infection rate (36 02%) in 15-19 age group was the highest, and the EPG (41 96) in 5-9 age group was significantly higher than other age groups. The IPC and RIPC in 5-9 age group (130 14 and 12 46), 25-29 age group (157 43 and 14 94) and 30-34 age group (162 08 and 15 41) were significantly higher than other age groups. The infection rate and intensity in male were 28 65% and 36 09, and in female were 28 98% and 36 05 respectively. There was no significant difference between sexes. The higher of education background and family economic income, the lower of the infection rate. In occupation analysis, the infection rate (72 46%) in tobacco farmers was the highest, followed by vegetable farmers (49 53%), both significantly higher than other occupation groups. The infection rate and intensity of inhabitants lived in plateau was the lowest (9 99% and 19 49), followed by in table land (50 11% and 39 58), and in terrace (64 08% and 55 30). Conclusion The endemicity of schistosomiasis in Xichang region was still severe. There was a positive correlation between education background and infection, family income and infection. The infection rate of inhabitant engaged in economic crops was significantly higher than other occupations.