Epidemiological characteristics of hemorrhagic fever with renal syndrome in Linyi city from 2005 to 2022
Objective To elucidate the epidemiological characteristics of hemorrhagic fever with renal syndrome(HFRS)in Linyi city and provide scientific evidence for formulating relevant prevention and control measures.Methods The HFRS epidemic data,including gender,age,occupation and current address,were collected from the Infectious Disease Repor-ting Information Management System,and the population information was collected from the Linyi Municipal Bureau of Statistics.Descriptive epidemiological analysis was conducted on the epidemic data of the whole city from January 1,2005 to December 31,2022.Linear regression analysis was performed on the incidence data,and the time trend was analyzed by Joinpoint regression model.Annual reported incidence and annual percentage change(APC)and average annual per-centage change(AAPC)were calculated.Results A total of 2 882 cases of HFRS were reported in Linyi city from 2005 to 2022,all of which were sporadic cases without outbreaks.The average annual incidence was 154/100 000,9 cases died,and the fatality rate was 0.31％.The number of cases and incidence rate showed a fluctuating downward trend,and the linear regression coefficient of the annual incidence was tested t=-4.471.P＜0.001.Joinpoint regression model showed no significant difference in the decline trend(AAPC=-11.46％,t=-1.104,P=0.269,95％CI was-28.67-9.89).The APCs for 2005-2007,2008-2011,2012-2014,and 2015-2022 were-33.83％,-7.65％,6.62％,and-13.05％,respectively.There were 2 098 males and 784 females with a sex ratio of 2.68:1.Farmers accounted for 90.11％(2 597/2 882).The age group of 30-＜70 years accounted for 80.25％(2 313/2 882).The cases were reported in Yishui county,Yinan county,Pingyi county and Junan county,accounting for 51.60％(1 487/2 882).The peak of the incidence was from October to December,accounting for 53.85％(1 552/2 882)of the total annual incidence.Conclusions From 2005 to 2022,the incidence of HFRS in Linyi city showed a fluctuating downward trend,and the affected popula-tion is still mainly male farmers.It is necessary to adhere to epidemic surveillance,continue to strengthen health educa-tion,vaccination and other prevention and control measures.
hemorrhagic fever with renal syndromeepidemiologyannual percentage changeLinyi city
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