一起学生甲3型流行性感冒爆发的调查

An Investigation on Influenza A_3 Explosion in School

目的了解一起学校流感爆发的情况及原因,以便为预防类似疫情的发生提供参考依据。方法填写统一的个案调查表,对学校所有学生及教职工进行流行病学调查,采集病例的漱口液分离培养流感病毒。结果本次疫情爆发总患病人数为397例,罹患率为9.39%。小学部、初中部、高中部、教职工罹患率分别为14.24%,7.34%,4.09%,1.33%。接种疫苗组与未接种组罹患率分别为5.83%和14.72%,流感疫苗总保护率为60.39%。3名病例的漱口液中检出甲3型流感病毒。结论疫情未及时报告是导致本起流感爆发的主要原因,接种流感疫苗可以有效预防流行性感冒。

Objective To know the causes of an influenza outbreak in a school and to provide reference evidence for the preventions. Methods A questionnaire investigation was conducted among the staff and students,then their collutory was collected to cultivate influenza virus. Results The total prevalence was 9.39% (397/4 230). The infection rates were 14.24%, 7.34%, 4.09% and 1.33% for the students in Primary Department, Junior Middle Department, Senior Middle Department and school staff. The infection rate among the group of people, who received vaccinations against influenza , was 5.83% :meanshile the infection rate of the other group was 14.72%. Total vaccination protection rate against influenza was 60.39%. Influenza A3 virus was detected among 3 cases' collutory. Conclusion Delayed report is the main cause of this influenza outbreak. Vaccination against influenza may be efficient to prevent people from being infected influenza.