清节洲移民建镇后对血吸虫病流行影响的纵向观察

Longitudinal observation on the influence to the prevalence of schistosomiasis after moving from outside embankment to town at Qingjie islet

目的观察移民建镇对血吸虫病流行的影响。方法采取现场调查方法,纵向观察移民建镇后钉螺分布、人畜血吸虫感染、滩地污染及环境变化情况。结果移民建镇后感染螺密度逐年下降,2005年较2002年下降了45.61%;滩地野粪阳性率有所下降,2005年较2002年下降了37.97%,但野粪密度和阳性份数未见减少,野粪污染仍相当严重;居民粪检阳性率波动不大,2005年较2002年仅下降1.86%。各年份已搬迁与未搬迁居民粪检阳性率差异无显著性;耕牛血吸虫感染率呈逐年下降趋势,2005年耕牛血吸虫感染率较2002年下降了49.4%;移民建镇后滩地开发力度加大。结论移民建镇单退地区短期内血吸虫病疫情未发生明显变化。

Objective To observe the influence to the prevalence of schistosomiasis after moving from outside embankment to town. Methods To survey the distribution of snail, the infection of residents and bovines, the comtamination on the marshland and the change of environment. Results The density of infested snail decreased gradually, it reduced by 45.61% in 2005 compared to 2002. The positive rate of wild feces on the marshland reduced by 37.97% in 2005 compared to 2002,but the density of wild feces and the number of positive weren＂ t decreased, the contamination was still serious. The infection rate of residents only reduced by 1.86% in 2005 compared to 2002. The infection rate between the residents moved and not-moved from outside embankment to town didn＂ t have remarkable difference. The infection rate of bovine also decreased gradually, it reduced by 49.4% in 2005 compared to 2002. The exploitation on the marshland was strenghtened after moving from outside embankment to town. Conclusion The prevalence of schistosomiasis didn＇t take obvious changes in recent years in the regions moved from outside embankment to town.