Objective To explore the epidemiological characteristics of scarlet fever in Huantai County from 2012 to 2022,and to provide scientific basis for risk assessment and the adoption of targeted prevention and control measures.Methods Descriptive epidemiological methods were used to analyze the data of reported scarlet fever cases in Huantai County from 2012 to 2022,and x2 test was used to compare the count data between groups.P＜0.05 was considered to be statistically significant.Results A total of 905 cases of scarlet fever were reported in Huantai County from 2012 to 2022,with an average annual incidence rate of 15.97/105.A rapid increase in the reported incidence rate occurred during the period from 2012 to 2019,while a significant decrease from 2020 to 2022,with statistically significant differences in the incidence rate of scarlet fever among different years(x2=426.06,P＜0.001).The time of incidence showed a peak in spring and summer(April-June)and a sub-peak in fall and winter(November-January).The high incidence areas were Shaohai Street and Suozhen Street.The male-to-female sex ratio was 1.59∶1,and the age of onset was dominated by the age group of 4-7 years old.The population categorization was dominated by kindergarten and nursery children and students.Conclusions The incidence of scarlet fever in Huantai County increased rapidly from 2012 to 2019,and decreased significantly from 2020 to 2022.The incidence of the disease had significant aggregation in the population,temporal and spatial distribution.It is necessary for us to do a good job of monitoring the key populations and strengthen the prevention and control management in the peak seasons,so as to avoid the spread of scarlet fever.
scarlet feverepidemiological analysisrisk assessmentincidence ratethe spatial,temporal and population distribution
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