Epidemiological study of influenza in children under 5 years in Putian city from 2018 to 2023
Objective To analyze the epidemiological characteristics of influenza in children under 5 years old in Putian,Fujian Province,and provide scientific evidence for developing influenza prevention and control strategies.Methods Respiratory specimens were collected from children under 5 years old at influenza sentinel hospitals in Putian from 2018 to 2023.Influenza viruses were detected using fluorescence PCR (Poly-merase Chain Reaction).Clinical data were statistically analyzed to characterize the spatiotemporal transmission patterns.Results A total of 7449 specimens were collected and tested during this period,of which 530 were positive for influenza (positive rate 7.12％).The highest number (147) and rate (13.83％) of positive cases occurred in 2018 and 2019,respectively.Influenza predominantly occurred in winter-spring and summer sea-sons,with alternating dominance between influenza A/H1N1 and B/Victoria strains.Xianyou County was high-incidence areas.The positive rates at 2,4,and 5 years old were 6.58％,9.92％ and 11.97％,respectively,showing an increasing trend with age.Significantly more males than females were infected (t=2.86,P<0.05).Conclusion This study found that influenza A/H1N1 and B/Victoria were the predominant strains in children under 5 in Putian.These strains exhibited distinct seasonality and age/gender distribution characteristics,provid-ing evidence for the development of local influenza prevention and control strategies.
万方数据
维普
