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目的了解某学校甲肝爆发的原因,为有效开展学校传染病防治工作提供参考。方法应用描述性流行病学方法分析病例的分布情况,提出初步病因假设,进行病例对照研究、访谈、现场观察和实验室检测,进一步验证假设。结果甲肝病例发病时间为2012年5月9日~6月8日。病例有班级集聚性。病例对照研究结果显示,饮用学校井水显著增加学生发生甲肝的危险性,是不喝井水学生的49倍。病例组与对照组的饮食差异无统计学意义(P>0.05)。结论此次疫情爆发主要是由于学生直接饮用被污染了的井水从而导致学校甲肝爆发。
Objective To understand the causes of hepatitis A in a school and provide reference for the effective prevention and treatment of infectious diseases in schools. Methods Descriptive epidemiological methods were used to analyze the distribution of cases, the initial etiological hypothesis was proposed, and case-control studies, interviews, field observations and laboratory tests were conducted to further verify the hypothesis. The incidence of hepatitis A cases from May 9 to June 8, 2012. Cases of class concentration. Case-control study showed that drinking well water wells significantly increased the risk of hepatitis A students, drinking water is not drinking 49 times. There was no significant difference in diet between the case group and the control group (P> 0.05). Conclusion The outbreak of the outbreak was mainly caused by the direct drinking of contaminated well water by students and the outbreak of hepatitis A in schools.