Spatio-temporal patterns of Oncomelania hupensis snail habitats in Suzhou, Wuxi and Changzhou cities along the Taihu Lake region.
Spatio-temporal patterns of Oncomelania hupensis snail habitats in Suzhou, Wuxi and Changzhou cities along the Taihu Lake region.
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DOI：
10.16250/j.32.1374.2020222
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发表时间：
2020-10-01
期刊：
影响因子：
--
通讯作者：
Yang Kun
中科院分区：
文献类型：
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作者：
Liu Mao-Mao;Feng Yun;Yang Kun
目的了解太湖地区沿着苏州、无锡、常州3市钉螺孳生地的时空分布特征，为建立灵敏、高效的血吸虫病监测预报体系提供技术支持。方法收集苏州、无锡、常州3市1950 - 2018年钉螺分布资料，描述钉螺栖息地历年变化趋势。利用Kernel密度分析和SaTScan时空扫描分析对钉螺栖息地进行聚类分析。结果1950 - 2018年苏州、无锡、常州三市钉螺孳生地数量呈单峰型分布，1970年达到峰值，之后迅速下降。62.68%的钉螺孳生地在鉴定后10年内消除，其中38.24%在鉴定当年消除。核密度分析和SaTScan时空扫描分析表明，1970 ~ 1980年钉螺栖息地高密度聚集区主要分布在昆山市、吴中区和相城区，1990年主要分布在宜兴市，此后聚集区逐渐缩小，总体呈现出从太湖东北向西迁移的趋势。1970年后，共发现4个新的集群，揭示了蜗牛栖息地的时空扫描。在现有螺类生境中，新出现的螺类生境主要分布在虎丘区（东渚镇）、吴中区（广福镇）、太仓市（沙溪镇）和金坛区，重现螺类生境分布在7个区。结论苏州、无锡、常州三市钉螺孳生地呈时空聚集性分布。钉螺孳生地的监测和预测是今后的重点。
Objective To investigate the spatio-temporal distribution characteristics of Oncomelania hupensis snail habitats in three cities of Suzhou, Wuxi and Changzhou along the Taihu Lake region, so as to provide technical supports for establishing a sensitive and highly effective surveillance and forecast system for schistosomiasis. Methods Snail distribution data were collected from Suzhou, Wuxi and Changzhou cities from 1950 to 2018, and the changing trend for snail habitats were described over years. In addition, the clusters of snail habitats were detected using Kernel density analysis and SaTScan space-time scan analysis. Results The number of snail habitats appeared a single-peak distribution in Suzhou, Wuxi and Changzhou cities from 1950 to 2018, which peaked in 1970 and then declined rapidly. There were 62.68% of snail habitats eliminated within 10 years after identification, of which 38.24% were eliminated at the year of identification. Kernel density analysis and SaTScan space -time scan analysis revealed that high-density clusters of snail habitats were mainly distributed in Kunshan City, Wuzhong District and Xiangcheng District from 1970 to 1980, and in Yixing City in 1990; since then, the clusters gradually shrank, and overall appeared a move from northeast to west of Taihu Lake. A total of 4 new clusters were detected after 1970, as revealed by space-time scanning of snail habitats. In current snail habitats, emerging snail habitats are mainly identified in Huqiu District (Dongzhu Town), Wuzhong District (Guangfu Town), Taicang City (Shaxi Town) and Jintan District, and re-emerging snail habitats are scattered in 7 districts. Conclusions The distribution of snail habitats are spatio-temporal aggregation in Suzhou, Wuxi and Changzhou cities. The monitoring and prediction of emerging and re-emerging snail habitats are the key points in the future.