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目的为巩固和扩展国家寄生虫病综合防治示范区成果,以及制定和完善寄生虫病控制规范提供科学依据。方法收集四川省丹棱县包含20世纪50年代起土源性线虫病流行状况在内的基本县情。于2011-2014年,每年调查土源性线虫(蛲虫除外)感染情况1次,每次总数不低于1 000人。描述主要虫种,分析不同年龄组、性别、职业和方位的人群感染率。结果史载蛔虫和钩虫感染率均曾超过95%。土源性线虫感染率2006年为57.12%,2009年为10.06%;2011-2014年分别为3.59%、2.08%、2.57%和5.35%。其中,2011-2014年钩虫感染率分别为2.49%、1.68%、2.17%和5.35%。总体上土源性线虫感染率多随年龄增大而增大,不同性别间差异无统计学意义(χ2=0.64,P=0.45),农民与非农职业间差异有统计学意义(χ2=11.18,P=0.00)。2014年,浅丘人群感染率为8.42%,深丘方位中的人群感染率最高为4.98%。结论四川省丹棱县人群土源性线虫病呈低度流行态势,人群主动和被动服药的积极性均降低,疫情出现反弹,应进一步观察。
Objective To provide a scientific basis for consolidating and expanding the achievements of the national demonstration area for integrated prevention and treatment of parasites and for formulating and perfecting the control regulations of parasitic diseases. Methods The basic county conditions in Danling County of Sichuan Province, including the prevalence of soil-borne nematodes since the 1950s, were collected. In 2011-2014, the annual survey of soil-borne nematodes (except pinworms) was carried out one time with a total number of not less than 1,000 per visit. Describe the major species of worms and analyze population-based rates of infection in different age groups, sexes, occupations and locations. Results The history of roundworms and hookworm infection rates were more than 95%. The infection rate of soil-borne nematodes was 57.12% in 2006 and 10.06% in 2009, while it was 3.59%, 2.08%, 2.57% and 5.35% respectively in 2011-2014. Among them, the infection rates of hookworm in 2011-2014 were 2.49%, 1.68%, 2.17% and 5.35% respectively. In general, the infection rates of soil-borne nematodes increased with age, but there was no significant difference among different sexes (χ2 = 0.64, P = 0.45). There was significant difference between peasants and non-agricultural occupations (χ2 = 11.18 , P = 0.00). In 2014, the infection rate in shallow hill was 8.42%, and the highest infection rate in deep hillside position was 4.98%. Conclusion The population of soil-borne nematodes in Danling County of Sichuan Province is in a low prevalence situation. The motivation of the active and passive taking of the population is reduced and the epidemic situation rebounds. Therefore, we should further observe.