云南省血吸虫病流行状况的GIS分析

Analysis of geographic information system on transmission of schistosomiasis in Yunnan Province

目的了解云南省血吸虫病的流行态势和分布特征。方法收集云南省1995年和2003年血吸虫病抽样调查资料,建立地理信息系统(GIS)数据库,用ArcView3.2软件Contours(等值线)法对人群、耕牛感染率进行空间分析,SPSS统计软件对抽样人群感染率和耕牛感染率作相关分析。结果云南省血吸虫病高危地区分布为大理市、永胜、鹤庆、洱源、巍山、南涧县,流行区中感染程度不同地区交错分布。人群感染率有所减弱,高强度地区分布面积缩小。耕牛感染率高危地区有向南转移的趋势。云南省的流行区划分为3个空间区域。结论云南省血防工作的重点为大理市、洱源、巍山、永胜、鹤庆、南涧县,抓好人畜同步化疗是防治工作的关键。

Objective To understand the epidemiologic trend and characteristics of the distribu tion of schistosomiasis in Yunnan Province, China. Methods The data of two sampling surveys on schistosomiasis in Yunnan in 1995 and 2003 were collected, and the database of GIS was set up. The spatial status of rates of human infection and cattle infection were analyzed by using the GIS software, ArcView 3.2, contours method. The relationships between rates of human infection and cattle infection in 1995 and 2003 were analyzed with SPSS statistical software. Results The high risk areas of schistosomiasis in Yunnan were Dali City, Yongsheng, Heqing, Eryuan, Weishan and Nanjian counties, and those areas contained different infection grades which were intertwine. The rate of human infection was descendent and the distribution of high-risk areas of schistosomiasis was decreasing. The Yunnan. Those of cattle was higher than before in the south of epidemic areas in epidemic areas of schistcsomiasis could be identified as Conclusions The control and prevention of schistosomiasis in Yunna three spatial n should he distributions. City, Eryuan, Weishan, Yongsheng, Heqing and Nanjian counties, and the key is synchronistical chemotherapy in human and cattle.