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  • Title: [Surveillance of human soil-transmitted nematodiasis in Jurong City from 2016 to 2020].
    Author: Zhao QH, Cao J, Li SM, Hou JH, Wu D, Zhang YH, Jiang CG.
    Journal: Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi; 2021 Jul 16; 34(1):89-91. PubMed ID: 35266364.
    Abstract:
    OBJECTIVE: To investigate the prevalence of soil-transmitted nematode human infections in Jurong City from 2016 to 2020, so as to provide the scientific evidence for formulating the control strategy. METHODS: During the period from 2016 to 2020, the permanent residents at ages of over 3 years living in Jurong City were selected as the study subjects. Stool samples were collected for the detection of soil-transmitted nematode eggs using the modified Kato-Katz thick smear method (two detections for one stool sample), and the species of hookworm was identified in stool-positive stool samples using the culture method. The prevalence and intensity of soil-transmitted nematode infections were calculated, and the change of the infection prevalence among years was examined using the Cochran-Armitage test for trend. RESULTS: A total of 10 011 people-time populations were detected for soil-transmitted nematode infections in Jurong City from 2016 to 2020, and 56 egg-positives were identified, with mean prevalence of 0.56%. The prevalence of soil-transmitted nematode human infections appeared a tendency towards a decline year by year in Jurong City (χ2trend = 5.15, P < 0.01). The mean prevalence of hookworm, Ascaris lumbricoides and Trichuris trichiura infections was 0.44%, 0.11% and 0.20% in Jurong City from 2016 to 2020, respectively, and individuals with hookworm infections accounted for 78.57% of all cases with soil-transmitted nematode infections. Single parasite (98.21%) and mild infection were pre-dominant in individuals with soil-transmitted nematode infections, and no multiple infections were seen after 2016. CONCLUSIONS: The prevalence of human soil-transmitted nematodiasis is low in Jurong City. Based on reinforcement of soil-transmitted nematodiasis surveillance, an increase in the health education investment is required to consolidate the control achievements. ［摘要］ 目的 了解2016—2020年句容市人群土源性线虫感染情况, 为制定土源性线虫病防治策略提供科学依据。方法 2016—2020年, 以句容市3周岁以上常住居民为监测对象, 采集监测对象粪便, 用改良加藤厚涂片法 (1粪2检) 检查土源性线虫虫卵, 钩虫感染阳性者粪便采用钩蚴培养法鉴别虫种。计算居民土源性线虫感染率和感染度, 应用Cochran-Armitage趋势检验法对逐年土源性线虫感染率进行趋势检验。结果 2016—2020年, 句容市累计开展人群土源性线虫感染监测10 011人·次, 累计检出土源性线虫感染病例56例, 平均感染率为0.56%, 感染率呈逐年下降趋势 (χ2趋势 = 5.15, P < 0.01)。钩虫、蛔虫、鞭虫平均感染率分别为0.44%、0.11%、0.20%, 其中钩虫感染者占总感染人数的78.57%; 土源性线虫感染者以单虫种 (98.21%)、轻度感染为主, 2016年后未见多重感染。结论 句容市人群土源性线虫病已处于低流行水平。今后应在加强土源性线虫病监测的基础上, 加强健康教育投入, 以巩固已取得的防治成效。.
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