Objective: To monitor the epidemic status of human soil-borne nematodiasis in Danyang City, so as to provide scientific evidence for formulating control measures.
Methods: The soil-borne nematode infections were tested using a modified Kato-Katz technique among residents aged more than 3 years living in Danyang City from 2012 to 2018, and the Enterobius vermicularis eggs were detected using the transparent adhesive tape anal swab method among children at ages of 3 to 12 years.
Results: A total of 13 540 residents were monitored for soil-borne nematode infections from 2012 to 2018, and the prevalence of human soil-borne nematode infections was 0.45%. The prevalence of Ascaris lumbricoides, Trichuris trichura and Enterobius vermicularis infections was 0.32%, 0.12% and 0.01%, respectively, and a single parasite infection was predominant. There were significant differences in the prevalence of soil-borne nematode (χ2 = 42.610, P < 0.05), A. lumbricoides (χ2 = 26.276, P < 0.05) and T. trichura (χ2 = 20.692, P < 0.05). The prevalence of human soil-borne nematode infections was 0.45% in males and 0.47% in females, and lower prevalence was found in local residents than in floating population (0.28% vs. 0.66%; χ2 = 10.561, P < 0.05). The highest infection was found in subjects at ages of 31 to 40 years (0.59%), followed by in subjects at ages of 41 to 50 years (0.56%), and the lowest infection was seen in children at ages of 3 to 5 years (0.27%). In addition, the prevalence of human soilborne nematode infections varied significantly in occupation (χ2 = 75.692, P < 0.05), with the highest infection seen in boatmen. Among the 5 078 children monitored, the prevalence of E. vermicularis infection was 0.37%, and the prevalence of E. vermicularis infection varied significantly in year (χ2= 15.466, P < 0.05).
Conclusions: The human soil-borne nematode infection is at a low level in Danyang City; however, the surveillance of soil-borne nematodiasis remains to be intensified in children living in rural areas and immigrant populations.
［摘要］ 目的 监测 2012–2018 年丹阳市人群±源性线虫病流行状况, 为制定防控措施提供科学依据。方法 2012–2018 年对丹阳市 3 周岁以上居民采用改良加藤厚涂片法检测±源性线虫感染情况, 其中 3～12 周岁儿童同时采用透明胶纸肛拭法检测蛲虫卵。结果 2012–2018 年, 丹阳市共开展±源性线虫病监测 13 540 人, 人群±源性线虫感染率为 0.45%。检出的感染虫种有蛔虫、鞭虫和蛲虫, 感染率分别为 0.32%、0.12% 和 0.01%; 以单虫种感染为主。各年度人群±源性线虫总感染率、蛔虫感染率和鞭虫感染率间差异均有统计学意义 (χ2 = 42.610、26.276、20.692, P 均< 0.05)。男性和女性人群±源性线虫平均感染率分别为 0.45% 和 0.47%; 本地人群和流动人群平均感染率分别为 0.28% 和 0.66%, 差异有统计学意义 (χ2 = 10.561, P < 0.05)。各年龄组中以 31 ~ 岁组感染率最高 (0.59%), 41 ~ 岁组次之 (0.56%), 最低为 3 ~ 岁组 (0.27%)。不同职业人群±源性线虫感染率差异有统计学意义 (χ2 = 75.692, P < 0.05), 其中以船员感染率最高。儿童蛲虫病共监测 5 078 人, 平均感染率为 0.37%; 各年度儿童蛲虫感染率差异有统计学意义 (χ2 = 15.466, P < 0.05)。结论 丹阳市人群±源性线虫感染已处于较低流行水平, 但仍应加强对农村儿童和外来流动人群的监测。.
Keywords: Ascaris lumbricoides; Danyang City; Enterobius vermicularis; Soil-borne nematodiasis; Surveillance; Trichuris trichura.