2007年西安市3起流感暴发疫情的调查

目的 调查分析西安市3起流行性感冒(流感)群体暴发的原因和特点,总结流感防控的经验教训.方法 对流感暴发病例所在群体进行流行病学调查;采集患者咽拭子进行流感病毒分离.结果 3所学校罹患率为23.2%;发病年龄主要为10-12岁学生;从43份咽拭子中分离出19株B型流感病毒.结论 3起疫情均由B型流感病毒引起,加强病原学监测对防止流感疫情暴发有重要意义.

Investigation of three cases of influenza outbreak in Xi'an in 2007

Objective The study was conducted to investigate the cause and characteristics of three cases of influenza (flu) outbreak in Xi'an in order to further the prevention and control of influenza. Methods Epidemiological investigation was performed among different groups of people to which the influenza infected patients belonged. Throat swab samples were collected for influenza virus isolation. Results The attack rate of three schools was 23.2%; the age of onset concentrated mainly in 10 to 12. A total of 19 strains of B-type influenza virus were isolated from 43 throat swabs. Conclusion All three cases were caused by the influenza B virus. Therefore, it is of great significance to strengthen the etiological surveillance for the prevention of influenza outbreaks.