He Jia-Chang, Wang Jia-Sheng, Lu Jin-You, Li Ting-Ting, Gao Feng-Hu, Zhou Ping, Zhu Chuan-Ming, He Long-Zhu, Yu Bei-Bei, Zhang Shi-Qing
Anhui Institute of Schistosomiasis Control, Hefei 230061, China; 2 Changjiang River Scientific Research Institute, Wuhan, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2011 Apr;23(2):199-201.
To understand the trend of Oncomelania hupensis snail distribution in Yangtze River valley of Anhui Province so as to provide an evidence for making out schistosomiasis prevention and control strategies in the future.
The snail data from 1998 to 2009 of the Yangtze River valley in Anhui Province were collected including the snail area, newly occurred and re-occurred snail areas, densities of snails and infected snails, etc., and the trend and influence factors were analyzed.
With several fluctuations, the snail area showed a trend of declining in general after the devastating summer flooding in 1998. From 1998 to 2009, 3 peaks of newly occurred snail areas appeared in 1998, 2004 and 2006 and 2 peaks of reoccurred snail areas appeared in 1998 and 2004. The densities of living snails and infected snails were more severe in banks of the Yangtze River than in islets of the Yangtze River. During 12 years, 1 peak of living snail density appeared in 2003, and 3 peaks of infected snail density appeared in 1999, 2003-2004 and 2006 in the islets of the Yangtze River. The densities of living snails and infected snails in banks of the Yangtze both appeared 1 peak in 1998.
The distribution of snails in the Yangtze River valley is related to nature, society and financial circumstances, and it is hard to completely perform the snail control in a short-term. Therefore, at the same time of strengthening snail control, we should also strengthen infectious source control.
了解安徽省长江流域钉螺分布变化趋势，为制定今后血吸虫病防治策略提供依据。
收集1998 - 2009年安徽省长江流域钉螺资料，包括钉螺面积、新出现和复现螺区、钉螺密度和感染性钉螺密度等，并分析其变化趋势及影响因素。
1998年特大洪涝灾害后，钉螺面积总体呈下降趋势，有几次波动。1998 - 2009年，新出现螺区出现3个高峰，分别在1998年、2004年和2006年；复现螺区出现2个高峰，分别在1998年和2004年。江滩钉螺和江洲钉螺中，活螺和感染性钉螺密度均以江滩为高。12年间，江洲活螺密度高峰出现在2003年，感染性钉螺密度高峰出现3次，分别在1999年、2003 - 2004年和2006年；江滩活螺和感染性钉螺密度高峰均出现在1998年。
长江流域钉螺分布与自然、社会、经济因素有关，短期内难以彻底控制钉螺，在加强灭螺的同时，应加强传染源控制。
