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目的了解鄱阳湖北岸都昌县钉螺消长趋势,为制定血吸虫病防治策略提供依据。方法收集2005-2012年都昌县的螺情资料,分析其变化趋势。结果 2005-2012年,都昌县活螺平均密度、活螺框出现率、感染螺密度和感染螺面积均呈大幅下降态势,并维持在较低水平,与2005年相比,2008年上述指标分别下降了70.06%、90.33%、79.48%和37.88%,2012年则分别下降了99.35%、98.98%、99.33%和93.93%。钉螺感染率在0.06%~0.53%间波动,呈先降后升态势。自2007年起,各年有螺面积保持在2 052.5 hm2不变。结论至2012年都昌县多数螺情指标均降至历史最低值,但有螺面积未见减少,钉螺感染率呈波动态势,提示血吸虫病传播风险仍然存在,仍需加强钉螺控制。
Objective To understand the trend of the growth and decline of Oncomelania snails in Duchang County, the northern shore of Poyang Lake, and to provide the basis for the prevention and treatment of schistosomiasis. Methods The data of snail in Duchang County from 2005 to 2012 were collected to analyze the changing trend. Results From 2005 to 2012, the average density of live snails in Duchang County, the occurrence rate of live snails, the density of infected snails and the area of infected snails showed a sharp decline and remained at a relatively low level. Compared with 2005, the above indexes Decreased by 70.06%, 90.33%, 79.48% and 37.88% respectively, but decreased by 99.35%, 98.98%, 99.33% and 93.93% respectively in 2012. Snail infection rate fluctuated between 0.06% and 0.53%, and then declined first and then rose. Since 2007, the area of snails has remained unchanged at 2 052.5 hm 2 in each year. Conclusion Most of the Loan indicators in Duchang County dropped to their lowest values in 2012, but there was no decrease in snail area and the infection rate of snails fluctuated, suggesting that the risk of transmission of schistosomiasis still exists and snail control should be strengthened.