Chin J Schisto Control ›› 2012, Vol. 24 ›› Issue (3): 315-317.

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Influencing factors of changes of Oncomelania snail densities in Poyang Lake region, Nanchang City, 2011

ZHOU Yi-sheng1|PENG Guo-hua1|HU Zhu-hua1|ZHU Rong2|YU Qing2|CAO Chun-li2|HU Guang-han1, 3|GUO Jia-gang2*   

  1. 1 Nanchang Center for Disease Control and Prevention| Nanchang 330038| China;2 National Institute of Parasitic Diseases| Chinese Center for Disease Control and Prevention| China;3 Jiangxi Provincial Institute of Parasitic Diseases| China
  • Online:2012-06-20 Published:2012-06-21
  • Contact: GUO Jia?gang

2011年南昌市鄱阳湖区钉螺密度变化的影响因素探讨

周义生1|彭国华1|胡主花1|朱蓉2|余晴2|曹淳力2|胡广汉1,3|郭家钢2*   

  1. 1 江西省南昌市疾病预防控制中心 (南昌 330038); 2 中国疾病预防控制中心寄生虫病预防控制所; 3江西省寄生虫病防治研究所
  • 通讯作者: 郭家钢
  • 作者简介:周义生|男|硕士研究生|主管医师。研究方向:血吸虫病控制

Abstract:

Objective To explore the influencing factors of the significant decrease of snail densities in Poyang Lake region, Nanchang City,2011. Methods According to the elevation of the environment,5 grasslands where there were high snail densi? ties and their elevations were from 14 to 17 m were selected as study areas. The data of snails in the past three years and the hydro? logical information in the past five years were collected and analyzed. The current snail status was surveyed and the fishermen were interviewed. Results The snail density of Poyang Lake region in Jinxian County decreased by 91.2% in 2011 compared with that in 2009(P < 0.01) . In 2010,the water levels were 13.90 m in April and 16.07 m in May respectively in Xingzi Station,and the rainfalls were 312 mm in April and 356 mm in May in Poyang Lake region;in 2011,the water levels were 8.73 m in April and 10.31 m in May respectively in Xingzi Station,and the rainfalls were 90 mm in April and 145 mm in May respectively in Poyang Lake region,which were lower than those during the past five years. There was no any other apparently unusual phenomenon. Con? clusion The significant decrease of snail densities in Poyang Lake region in 2011 may be related to the long soaking time of marshland in 2010 and low rainfall in the first half of 2011.

Key words: Oncomelania snail; Endemic situation;Poyang Lake region; Nanchang City

摘要:

目的 探索导致南昌市鄱阳湖区2011年钉螺密度大幅度下降的因素。方法 根据草洲高程, 选择涵盖密螺带的高程 (14~17 m) 草洲5块, 收集、 比较近3年的螺情资料和近5年的水文资料。进行现场螺情调查及渔船民访谈。结果 2011年进贤县泥洲钉螺密度比2009年下降了91.2%, 新建县水湖洲下降了95.9% (P均<0.01), 2010年鄱阳湖区4、 5月降雨量分别为312 mm和356 mm, 星子站水位分别为13.90 m和16.07 m, 均超近5年同期; 2011年4、 5月降雨量分别为90 mm 和145 mm, 星子站水位分别为8.73 m和10.31 m, 均较近5年同期偏低。未发现其他明显异常现象。结论 2011年鄱阳湖区钉螺密度大幅度下降可能与2010年草洲浸水时间长和2011年上半年降雨量偏少有关。

关键词: 钉螺; 疫情; 鄱阳湖区; 南昌市

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