Epidemiological characteristics and spatial-temporal clustering of pertussis in Hefei City,2012-2022
Objective To analyze the epidemiological and spatial-temporal distribution features of pertussis in Hefei City,to explore its key incidence areas,and to provide references for pertussis prevention and control.Methods The data about pertussis incidence in Hefei City during 2012-2022 were collected from the China Disease Prevention and Control Information System,and then descriptively analyzed by using spatial analysis and spatiotemporal scanning statistics.Results A total of 693 pertussis cases were reported in Hefei City from 2012 to 2022,with the average annual reported incidence rate of 0.21/100,000.The cases'distribution was seasonal(in May-September).The cases were mainly concentrated in children under 1 year old,and most of them were scattered children,students and children in kindergarten(87.31％),with a male to female sex ratio of 1.10∶1.Shushan District,Luyang District and Yaohai District were the major high incidence areas of pertussis in Hefei City.The results of global spatial autocorrelation analysis revealed that there was spatial aggregation of pertussis incidence in all counties(urban areas)of Hefei City during 2021-2022(P＜0.01).Local spatial autocorrelation analysis displayed that hot spots(high-high clusters)appeared in the incidence of pertussis during 2021-2022(P＜0.01).A total of 2 clusters were detected by spatiotemporal scanning analysis,and the first cluster was from January 1,2021 to December 30,2022,with Luyang District and Yaohai District as the center.The second cluster was from January 1 to December 30,2019,with Shushan District as the center.Conclusion The incidence of pertussis in Hefei City in 2012-2022 was characterized by a low-high fluctuation,of which the incidence of pertussis during 2020-2022 showed an upward trend,with a phenomenon of pertussis recurrence.Luyang District and Yaohai District were the high incidence areas in 2022,with a spatiotemporal aggregation,and mainly in the young age.It is necessary to strengthen the publicity,education,monitoring and training among the key population in the key areas.
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