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  • Title: [Surveillance and risk assessment system of schistosomiasis in Jiangsu Province Ⅲ Risk of schistosomiasis transmission in the area along the Yangtze River in Yangzhou City].
    Author: Yin-Ping Z, Dao-Jian Z, Guang-Lin D, Kai T, Yu-Cai M, Zheng-Qiu Z, Shao-Zhou C, Fubiao W, Hong-Ping T, Jin Z, Le-Ping S.
    Journal: Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi; 2016 Aug 02; 28(4):353-357. PubMed ID: 29376272.
    Abstract:
    OBJECTIVE: To evaluate the potential risk of schistosomiasis transmission in the area along the Yangtze River in Yangzhou City, so as to provide evidences for establishing a post-transmission surveillance system for schistosomiasis in marshland regions. METHODS: The water infectivity, floating boatmen and fishermen infection, reservoir host infection and wild feces contamination were investigated in five districts/counties along the Yangtze River in Yangzhou City, including Guangling, Hanjiang, Jiangdu, Yizheng and Development Zone, and the transmission factors and risky characteristics were assessed after interruption of schistosomiasis transmission in marshland regions. RESULTS: A total of 15 key water regions were identified in the area along the Yangtze River in Yangzhou City in 2015. A total of 1 500 sentinel mice were placed, after breeding, their overall survival rate was 99.33%; 1 490 were dissected, with no schistosome infection. Of the 5 576 floating boatmen and fishermen examined, no schistosome infection was observed, and among the 3 566 domestic animals (including 171 cattle, 1 895 sheep and 1 500 pigs), no infections were detected. During the period between January and March, 2016, there were 3 200 mouse traps placed on 8 marshlands, and 62 wild mice were captured from 6 marshlands, with a capture rate of 1.94%, and no schistosomeinfected wild mice were seen. In addition, there were 35 pieces of fresh wild feces captured from 7 marshlands, including 11 pieces of bovine feces (31.43%), 17 pieces of sheep feces (48.57%), 2 pieces of dog feces (5.71%) and 5 pieces of other feces (14.29%), and no infections were detected. CONCLUSIONS: There is a low risk of schistosomiasis transmission in the area along the Yangtze River in Yangzhou City. However, the contamination of feces from bovine and sheep that are freely pastured on marshlands is a big threat to schistosomiasis control. ［摘要］目的 评估扬州市沿江地区血吸虫病传播的潜在风险, 为江滩地区传播阻断后监测体系的构建提供依据。方 法 在扬州市沿江的广陵、邗江、江都、仪征和开发区5个区 (市) 开展水体血吸虫感染性、水上流动传染源、江滩保虫宿 主和野粪污染情况调查, 评估和分析江滩地区血吸虫病传播阻断后的潜在传播因素与风险特征。结果 2015年, 在扬 州市沿江地区确定15个重点水域, 共投放哨鼠1 500只, 饲养后总存活率为99.33%; 解剖哨鼠1 490只, 未查到阳性哨 鼠。共检查水上流动人员5 576名, 未查到粪检阳性病人; 共检查家畜3 566头 (只), 其中牛171头、羊1 895只、猪1 500 头, 未查到病畜。2016年1-3月在8块江滩共投放3 200只鼠夹, 在6块江滩捕获野鼠62只, 野鼠捕获率为1.94%, 未发现 感染血吸虫的野鼠; 在7块江滩检获新鲜野粪35份, 其中牛粪11份、羊粪17份、狗粪2份、其他野粪5份, 分别占31.43%、 48.57%、5.71%和14.29%, 对检获的野粪进行检测, 未查出阳性野粪。结论 扬州市沿江地区血吸虫病传播风险较低, 但 江滩放养的牛、羊等家畜粪便所致污染是疫情发生的重大隐患。.
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