Objective To investigate the prevalence and severity of soil-transmitted nematode infec⁃tions in Lingbi County as well as endemic patterns and influencing factors for supplying scientific strategies with prevention and management of this infection. Methods Modified Kato-Katz thick smear technique was used to determine Ascaris lumbricoides, Trichuris trichiura and hookworms from the stool samples(one stool specimen-three slides) collected from 1 000 local villagers of Lingbi County in yearly manner. Other parasite species, if detected, were registered as well. Another 15 soil samples were collected for microscopic examina⁃tion on the presence of tapeworms. Results A total of 3 000 persons were subjected to stool detection from 2011 to 2013. The average infection rate in the 3 years was 13.3%, 7.0%and 6.8%respectively. The infectiosi⁃ty was mild in general, and the infection was primarily involved in ancylostomiasis. The major species found in the soil was Ancylostoma duodenale. Conclusion Lingbi County falls into class 2 endemic area, and the infec⁃tiosity for infected people is generally mild.%目的：了解灵璧县土源性寄生虫病流行现状和感染程度，探索流行规律及影响因素，科学制订防治策略和防治措施。方法每年采用改良加藤厚涂片法（一送三检）对1000名居民的蛔虫、鞭虫和钩虫感染情况进行调查，调查中若发现其它寄生虫感染也一并记录。每年采用镜检方法对15份土壤样本中的钩蚴污染情况进行调查。结果从2011到2013年共调查3000人，3年的感染率分别为13.3%、7.0%和6.8%。感染者主要集中在轻度感染中，且以钩虫感染为主。土壤钩蚴污染以十二指肠钩蚴为主。结论灵璧县属Ⅱ类流行区，感染度以轻度为主。
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