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目的掌握望城县血吸虫病疫情动态和影响因素,为制定防治策略提供科学依据。方法2005~2007年每年4~5月对望城县国家级血吸虫病监测点采取系统抽样法进行螺情监测,10~11月对人群采用间接血凝试验(IHA)筛查,阳性者以Kato-Katz法进行病原学检查,并收集监测点3年的螺情、居民病情监测资料进行统计分析。结果2005~2007年活螺框出现率分别为32.19%、17.40%、0.93%;活螺平均密度分别为2.95、1.00、0.001 9只/0.1 m2;居民感染率分别为1.72%、1.24%、0.25%。2007年与2005年相比,活螺框出现率、活螺平均密度、居民感染率分别下降了97.11%、99.94%、85.47%。结论监测点血吸虫病疫情呈逐年下降趋势,但疫情形势依然严峻,需进一步加大防治力度,防止疫情回升。
Objective To investigate the epidemic situation of schistosomiasis and its influencing factors in Wangcheng County and provide a scientific basis for the development of control strategies. Methods From April to May of each year from 2005 to 2007, we conducted a systematic sampling method to monitor the national schistosomiasis surveillance points in Wangcheng County. From October to November, the population was screened by indirect hemagglutination test (IHA) Katz method to conduct etiological examination, and collect the monitoring point 3 years of snail, resident condition monitoring data for statistical analysis. Results The prevalence rates of live screw frames from 2005 to 2007 were 32.19%, 17.40% and 0.93%, respectively. The mean density of live snails was 2.95, 1.00 and 0.001 respectively. The infection rates were 1.72%, 1.24%, 0.25 %. Compared with 2005, the incidence of live screw, the average density of live snails, and the infection rate of residents decreased by 97.11%, 99.94% and 85.47% respectively in 2007 and 2005. Conclusion The epidemic situation of schistosomiasis at the monitoring point shows a declining trend year by year. However, the epidemic situation is still grim. Prevention and control should be further strengthened to prevent the epidemic from rising.