江宁县江滩钉螺空间分布特征分析

• 作 者: 张治英 徐德忠 彭华 孙志东 周云 周晓农 龚自立
• 机 构: 第四军医大学流行病学教研室,第四军医大学流行病学教研室,西安市碑林区卫生防疫站,第四军医大学流行病学教研室,江苏省江宁县疾病预防控制中心,中国疾病预防控制中心寄生虫病防治研究所,南京军区联勤部防疫队
• 出 处: 中国公共卫生
• 发表日期: 2004年03期
• 关键词: 钉螺 地理信息系统 空间聚集性 变异函数

目的　探讨江宁县江滩钉螺的空间分布特征。方法　应用地理信息系统结合空间扫描法检测江滩钉螺分布的空间聚集性 ,并进一步以变异函数对钉螺的空间分布特征进行定量分析。结果　地理信息系统可见 ,2 0 0 0年江滩钉螺孳生地主要分布在洲滩的沿江地区 ;同时空间扫描分析发现在江滩分别有 2个活螺和 2个感染螺的高聚集区 ,其螺密度明显高于周围地区 (P <0 0 0 1) ;进一步以变异函数分析显示 ,江宁县江滩钉螺在空间的分布存在自相关性 ,其分布变异呈球型模型 ,当距离小于 0 0 3 0 1时 ,钉螺在空间分布上的变异与距离有关 ,并可以通过变异函数来估计。同时钉螺在空间各方向上的分布有所不同。结论　江宁县江滩钉螺分布的空间聚集性及自相关性 ,提示这些地区存在适合于钉螺孳生分布的因素

Objective To investigate the spatial distribution characteristics of Oncomelania hupensis in Jiangning County. Methods The spatial clustering of Oncomelania snails distribution was detected by GIS combined with spatial scanning method, and the spatial distribution characteristics of Oncomelania snails were quantitatively analyzed by using the mutation function. Results The geographic information system shows that the main breeding sites for snailhead snails are located in the coastal areas of Chau Beach in 2000. At the same time, the spatial scanning analysis shows that there are two live snails and two high snail enclaves in the river bank, respectively The snail density was significantly higher than that of the surrounding area (P <0.01). Further analysis by variance showed that the distribution of Oncomelania snails in Jiangning County was self-correlated and the distribution variation was spherical. When the distance was less than 0 0 At 0 0 1, the variation in the spatial distribution of Oncomelania is related to distance and can be estimated by the variogram. At the same time snail distribution in all directions in the space is different. Conclusion The spatial clustering and autocorrelation of Oncomelania snail distribution in Jiangning County suggest that there are some suitable factors for snail breeding in these areas