山丘型地区人群血吸虫季节性感染规律调查

Investigation on Schistosoma japonicaun infection pattern of human in different seasons in a hilly area

目的了解当前农村社会、经济状况下山丘型地区人群血吸虫季节性感染规律,为制定符合该类地区特点的血吸虫病防治对策提供依据。方法分别在6月、9月下旬和12月上旬用单纯随机抽样方法在奚滩村5周岁以上常住居民中随机抽取500人,利用Kato-Katz法进行粪检,以判断春、夏、秋不同季节人群血吸虫感染情况。结果总体上,人群感染率春季为11.8%,夏季为6.4%、秋季为3.3,差异有统计学意义(P<0.05)。不同年龄、性别和职业人群血吸虫感染情况季节性差异有统计学意义(P<0.05)。≤20岁人群、学生及各性别人群春季感染率均显著地高于夏、秋季;农民春、夏两季感染率均显著高于秋季;>20岁人群随春、夏、秋季节变化感染率随之降低。结论山丘型地区人群感染血吸虫的主要季节在春季,秋季感染率最低。

Objective To understand the pattern of human sehistosoma infection among different seasons in the hilly areas under the present rural social and economic conditions so as to provide a theoretical foundation for the formulation of the strategy of Schistosomiasis control. Methods About 500 permanent people aged older than 5 in Xitan village were selected randomly in the last ten - day period of Junn and September, and the first ten days of December respectively. Their stool specimen were examined with the method of Kato - Katz（ three slides were made from one specimen）. Results The infection rate of human was generally 11.8% in Spring, 6.4% in Summer and 3.3% in Fall with a significant difference among different seasons. The infection rate in Summer was significantly higher than that in Spring and Fall in the population younger than 20, students in primary and middle schools, and both male and female people. For farmers, the infection rates in spring and summer were significantly higher than the in autumn. For people older than 20, the infection rates reduced gradually and significantly with the seasons going. Conclusion Spring is the chief infection season and fall is the season with the least opportunity for infection in hilly areas.