Du C H, Yang H, Yang M X, Zhang Y, Sun J Y, Wang L F, Yan J Q, Shen M F, Dong Y
Yunnan Institute of Endemic Diseases Control and Prevention, Dali 671000, China.
Dali Institute of Schistosomiasis Control and Prevention, Yunnan Province, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2020 Oct 26;32(5):531-533. doi: 10.16250/j.32.1374.2020027.
To assess the schistosomiasis transmission risk in Nanjing County, so as to provide the scientific evidence for the development of the schistosomiasis control strategy and consolidation of the control achievements.
On May 2019, the Deqiu Village in Deqiu Town and Baiyun Village in Nanjing Town of Yunnan Province, where schistosomiasis were historically relatively highly endemic, were selected to assess the risk of transmission of schistosomiasis by means of a retrospective review of the data pertaining to the historical endemic situation and schistosomiasis control, combined with a cross-sectional survey of snail and wild feces distribution.
During the period between 2017 and 2018, the mean sero-prevalence rates of infections were 6.76% (202/2 990) and 2.86% (142/4 971) in humans and 0 (0/1 160) and 10.65% (31/291) in bovines in Deqiu and Baiyun villages of Nanjian County, respectively; however, no egg-positives were identified; in addition, there were 21.06 hm snail habitats found, but no infections were detected in snails. In 2019, there was 6.17 hm snail habitats detected, with 2.17% (245/11 298) occurrence of frames with snails and a 0.06 snails/0.1 m density of living snails; however, no positives for nucleic acid detection were seen in snails; among the 136 wild fecal samples captures from 23 settings, no infections were identified.
The risk of schistosomiasis transmission remains at a low level in Nanjian County; however, the factors affecting the transmission of schistosomiasis have not been completed eliminated. The integrated schistosomiasis control strategy with an emphasis on the control of the source of infections requires to be reinforced to consolidate the control achievements.
评估南涧县血吸虫病传播风险，为制定血吸虫病防治策略及巩固防治成果提供科学依据。
2019年5月，选取云南省南涧镇德苴村和南涧镇白云村这两个历史上血吸虫病流行程度相对较高的村庄，通过回顾历史疫情及血吸虫病防治相关数据，并结合钉螺和野生动物粪便分布的横断面调查，评估血吸虫病传播风险。
2017 - 2018年期间，南涧县德苴村和白云村人群感染的平均血清学阳性率分别为6.76%（202/2990）和2.86%（142/4971），牛的感染率分别为0（0/1160）和10.65%（31/291）；但未发现虫卵阳性者；此外，共发现钉螺孳生地21.06公顷，未检测到钉螺感染。2019年，检测到钉螺孳生地6.17公顷，有螺框出现率为2.17%（245/11298），活螺密度为0.06只/0.1平方米；未检测到钉螺核酸阳性；在23个点位采集的136份野生动物粪便样本中，未检测到感染。
南涧县血吸虫病传播风险处于低水平；然而，影响血吸虫病传播的因素尚未完全消除。需强化以传染源控制为重点的血吸虫病综合防治策略，巩固防治成果。
