Objective: To understand the status of human hookworm (Ancylostoma duodenale or Necator americanus) infection in Jiangxi Province.
Methods: A stratified cluster random sampling was conducted based on the geographical location and economic condition in 2014. Kato-Katz's thick smear method was used for stool examinations, and filter paper cultivation was conducted for distinguishing the species of hookworms.
Results: A total of 21 615 persons were involved in the investigation, and there were 1 095 persons infected with hookworm with the prevalence of 5.07% (standardized rate of 4.05%). The infection rate of hookworm in Nanfeng County was the highest (13.96%). Most of the infected people had low worm burden (95.43%). The infection rate of hookworm of the female was higher than that of the male (χ2 = 28.03, P < 0.05). The prevalence increased with the age, while the infection rate of hookworm in people at ages of 75 years and higher was the highest (14.79%). Housewife was the highest risk occupation with the infection rate of 7.55%. The differences of infection rates among different educational level groups were significant (χ2 = 135.88, P < 0.05). The prevalence rates of hookworm in different landforms were significantly different (χ2 = 34.37, P < 0.05). The priority species was N. americanus (80.41%) in Jiangxi Province.
Conclusions: The infection rate of hookworm decreases obviously in Jiangxi Province. The high risk groups of hookworm infection are the people with low educational level, female and elder age-group.
[摘要] 目的 了解江西省钩虫病流行状况。方法 2014年按生态区和经济水平在江西省进行分层整群随机抽样, 对 调查对象采用改良加藤厚涂片法进行钩虫感染病原学检查, 应用试管滤纸培养法区别十二指肠钩虫和美洲钩虫。结 果 全省共调查21 615人, 钩虫感染1 095人, 感染率为5.07%, 标化感染率为4.05%。不同县 (市、区) 钩虫感染率以南丰 县最高 (13.96%), 感染者以轻度感染为主 (95.43%), 女性钩虫感染率高于男性 (χ2 = 28.03, P < 0.05)。感染率随年龄增长 呈上升趋势, 75～岁年龄组钩虫感染率最高 (14.79%)。家庭妇女为钩虫感染率最高的职业 (7.55%)。不同文化程度者 钩虫感染率差异有统计学意义 (χ2 = 135.88, P < 0.05), 不同地形村居民钩虫感染率差异有统计学意义 (χ2 = 34.37, P < 0.05)。虫种以美洲钩虫为主 (80.41%)。结论 江西省钩虫感染率下降趋势明显。文化程度低、女性、高年龄组为感染 高危人群。.
Keywords: Epidemiological investigation; Hookworm; Jiangxi Province.