Abstract：Objective To analyze and explore the surveillance results of influenza-like illness (ILI) cases in sentinel hospitals for influenza monitoring in Guangzhou City from 2003 to 2020 so as to provide a scientific basis for influenza prevention and control. Methods A descriptive epidemiological analysis was conducted based on the number of reported influenza cases and the reported morbidity of influenza in Guangzhou City from 2003 to 2020 collected through China Information System for Diseases Control and Prevention as well as the monitoring information about ILI cases in each sentinel hospital in Guangzhou City during 2003-2020collected through the Monitoring and Early Warning System for Public Health Emergencies in Guangzhou City.A chi-square test based on hierarchical data was used to analyze the differences in the incidence of influenza in different years and different genders. Results A total of 101.43 million cases of outpatient (emergency) attendance in Guangzhou City were monitoredcumulatively since 2008, and more than 5.03 million ILI cases were reported. The reported morbidity increased continuously since 2015 (males: χ2=371,894.146, P<0.001; females: χ2=366,740.254, P<0.001), and the total morbidity of males was higher than that of females (χ2=972.707, P<0.001). The incidence peak of ILI cases mainly occurred in January, March-July and November-December, and the general trend of each year was roughly the same. The main age group in ILI cases was infants aged 0-4 years, followed by children aged 5-14 years. The reported cases of influenza were mainly concentrated in children aged 5-14 years, followed by infants aged 0-4 years. The number of reported influenza cases was higher in males than in females, and the difference was statistically significant (P<0.001).Influenza etiological surveillance revealed that the main epidemic strain of influenza in Guangzhou City was type A (H1N1) (41.32%), followed by type A (H3N2) (29.53%). The dominant strains were different in different years. Conclusion The epidemic of ILI cases in Guangzhou City in 2003-2020 showed seasonality. The epidemic intensity gradually increased, and the incidence of influenza was higher in males than in females. However, the normalization of COVID-19 control and prevention has a positive effect on influenza prevention and control.
吴迪, 曹蓝, 刘艳慧, 陈艺韵, 李魁彪, 陆剑云. 2003—2020年广州市19家市级流感监测哨点医院流感样病例监测分析[J]. 实用预防医学, 2022, 29(1): 6-10.
WU Di, CAO Lan, LIU Yan-hui, CHEN Yi-yun, LI Kui-biao, LU Jian-yun. Surveillance of influenza-like illness cases in 19 municipal sentinel hospitals for influenza monitoring in Guangzhou City, 2003-2020. , 2022, 29(1): 6-10.
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