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目的了解济宁市流感样病例暴发疫情特征,为科学防控流感提供参考依据。方法回顾性分析济宁市2009年流感样病例暴发疫情资料。结果济宁市2009年累计报告流感样病例暴发疫情22起,累计发病人数554例,平均罹患率为1.67%。全市12县市区中有8个有流感样病例暴发疫情报告,18起(81.82%)发生于9~12月;21起(95.45%)发生于中、小学生人群;14起(63.64%)疫情发病人数规模在30例以下。流感样病例暴发疫情主要由甲型流感病毒(81.82%,18/22)引起。所有甲乙型流感PCR检测的阳性标本均立即接种MDCK细胞进行病毒分离培养,共分离流感病毒15株,溯源于5起疫情(5/222,2.73%),其中1起为H3N2亚型、4起为新甲型H1N1亚型。自9月份始明显升高9,月份上中旬以季节性甲3流感暴发为主,9月份下旬以后以新甲型H1N1流感为主,秋冬季为暴发高峰。结论济宁市2009年流感样病例暴发疫情主要由甲型流感病毒引起,主要发生于9～12月,学校是全市流感暴发疫情防控工作的关键所在。
Objective To understand the outbreak characteristics of influenza-like cases in Jining and provide reference for scientific prevention and control of influenza. Methods The epidemic situation of influenza-like cases in 2009 in Jining City was retrospectively analyzed. Results In 2009, Jining City reported a total of 22 outbreaks of influenza-like illness outbreaks, with a cumulative incidence of 554 cases and an average attack rate of 1.67%. Eight out of 12 counties and cities in the city reported influenza outbreaks, 18 (81.82%) occurred in September to December; 21 (95.45%) occurred in primary and secondary school students; 14 (63.64%) outbreaks The number of patients in the following 30 cases. Influenza-like outbreaks were mainly caused by influenza A virus (81.82%, 18/22). All the positive samples of influenza A and B were directly inoculated with MDCK cells for virus isolation and culture. Fifteen strains of influenza virus were isolated and traced back to 5 outbreaks (5/222 and 2.73%), of which 1 was H3N2 subtype and 4 For the new A H1N1 subtype. Since September was significantly increased 9, the middle of the month in a seasonal outbreak of seasonal flu 3 flu, mainly in late September after the new influenza A (H1N1), autumn and winter as the peak. Conclusion The outbreak of influenza-like illness in Jining City in 2009 was mainly caused by Influenza A virus, which occurred mainly from September to December. The school is the key to prevention and control of influenza outbreak in the city.