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目的调查连州市某中学流感暴发的原因及流行特征,为控制类似疫情提供科学依据。方法对流感样病例所在群体进行流行病学调查;采集症状典型的现症病例咽拭子及急性期和恢复期血清各10份送广东省疾控中心实验室采用MDCK cells进行病毒分离。结果共发病51例,罹患率为4.99%。10份标本全部分离出毒株,均为B型流感病毒维多利亚株。结论本次疫情由B型流感病毒引起,暴发原因为未及时隔离治疗病人和未开展流感疫苗接种及该校住宿条件差等。加强病原学监测和加大对中小学等单位进行流感疫苗预防接种,对防止疫情暴发有重要意义。
Objective To investigate the causes and epidemic characteristics of flu outbreak in a middle school in Lianzhou City and provide a scientific basis for controlling similar outbreaks. Methods Epidemiological investigation was carried out on the population of influenza-like cases. Throat swabs and 10 acute and convalescent sera were collected from the typical cases of symptoms and were sent to Guangdong CDCs lab for virus isolation using MDCK cells. Results A total of 51 cases of disease, the attack rate was 4.99%. All 10 strains were isolated from the strains, all of which were type B influenza virus Victoria strain. Conclusions The outbreak was caused by influenza B virus. The reasons for the outbreak were that the patients were not treated in time and were not vaccinated against influenza and that the school conditions were poor. Strengthening etiological monitoring and increasing vaccination of primary and secondary schools and other units for influenza vaccination are of great significance in preventing the outbreak of the epidemic.