Objective: To understand the endemic dynamics and situation of schistosomiasis in a provincial surveillance site in Haining City, Zhejiang Province.
Methods: The Oncomelania hupensis snail status, schistosome infection situations of permanent residents and floating population in Qinmin Village, Haining City were monitored from 2012 to 2014 according to The Surveillance Programs of Schistosomiasis in Surveillance Sites of Zhejiang Province.
Results: Totally 600 permanent residents were examined from 2012 to 2014. The total positive rate of the serum antibody against Schistosoma japonicum was 3.17% (19/600). The rates in each year were 2.50% (5/200), 0 (0/200), and 7.00% (14/200), respectively, and the rate in 2014 were significantly higher than that in 2013 (χ2 = 14.508, P < 0.01), but no positives were found in the fecal examination. Totally 1 591 floating population were involved in the surveillance, the positive rate of serum antibody were 0.94% (15/1 591). The rates in active surveillance and passive surveillance were 0.92% (14/1 521) and 1.43% (1/70), respectively, and there were no statistically significant difference between them (χ2 = 1.659, P > 0.05). The positive rates of serum antibody among each year were 1.50% (8/534), 0.56% (3/531), and 0.76% (4/526), respectively, and the difference was not statistically significant (χ2 = 2.752, P >0.05), but no positives were found in the fecal examination. The snail surveillance showed that there were no environments with infected snails and imported snails.
Conclusions: There exist the infection sources of schistosomiasis in Haining City. Therefore, we should be on high alert for the potential of local endemic of the disease. Meanwhile, we still should strengthen the snail surveillance as well as the infection surveillance among the floating population.
［摘要］ 目的 了解海宁市省级血吸虫病监测点疫情动态和流行现状。 方法 根据《浙江省血吸虫病监测点监测方 案》, 2012-2014年对海宁市海昌街道勤民村省级监测点螺情、常住居民、流动人口病情等进行监测。结果 2012-2014 年监测点共调查常住居民600人, 血检阳性率为3.17% (19/600), 粪检均为阴性; 3年血检阳性率分别为2.50% (5/200) 、0 (0/200) 、7.00% (14/200), 2014年血检阳性率显著高于2013年 (χ2 = 14.508, P < 0.01) 。3年共监测流动人口1 591人, 血 检阳性率为0.94% (15/1 591), 粪检均为阴性; 其中主动监测和被动监测血检阳性率分别为0.92% (14/1 521) 和1.43% (1/70), 差异无统计学意义 (χ2 = 1.659, P > 0.05); 各年血检阳性率分别为1.50% (8/534) 、0.56% (3/531) 、0.76% (4/526), 差异 无统计学意义 (χ2 = 2.752, P > 0.05) 。螺情监测显示未发现阳性钉螺环境和钉螺输入。结论 海宁市存在血吸虫病传 染源, 需警惕局部流行的可能。今后仍需加强螺情监测和外来流动人员病情监测。.
Keywords: Endemic situation; Floating population; Haining City; Oncomelania hupensis; River and lake region; Schistosomiasis; Surveillance.