Analysis of the epidemiological characteristics of severe fever with thrombocytopenia syndrome in Weifang city from 2011 to 2021
Objective To explore the characteristics of severe fever with thrombocytopenia syndrome(SFTS)cases in Wei-fang city,so as to providing a basis for prevention and control.Methods All SFTS cases in Weifang city from January 1,2011,to December 31,2021,were analyzed in the"National Health Security and Disease Control Information System."The distribution,utilization,and composition ratio of SFTS cases in different regions,populations,and time periods were statistically described.Stratified analysis was conducted according to confirmed and non-confirmed cases to compare the epidemiological characteristics between different case types.Results The average annual incidence rate of confirmed cases was 0.22 per 100 000 people,with a high incidence from May to August,and two peaks in the outbreak.In mountainous and hilly areas such as Qingzhou city,Linqu county,and Anqiu city,the incidence was high.The average age of onset was 62.7 years old,with women and farmers being the main high-risk groups.The incidence of non-confirmed cases showed a significant downward trend,with a peak in July,and an average age of onset of 53.6 years old.Men and farm-ers were the main high-risk groups,with no obvious regional clustering.Compared with non-confirmed cases,there were statistically significant differences in the number of cases by year(x2=81.42,P＜0.001),month(x2=60.30,P＜0.001),number of cases in each county and city(x2=66.72,P＜0.001),male and female cases(x2=9.52,P=0.002),age of onset(t=5.86,P＜0.001),and population of onset(x2=44.00,P＜0.001).The time from onset to consultation for all cases was 7.8 days,and the interval between the final diagnosis and onset for confirmed cases was 127.7 days.Both confirmed and non-confirmed cases were diagnosed after 7 days from the onset,with the diagnosis time for confirmed cases significantly delayed compared to non-confirmed cases.Conclusions The fluctuation of SFTS cases in Weifang city exhibits a bimodal distribution,with seasonal and spatial clustering,and a high incidence among farmers.The long duration of laboratory testing and the impact of non-confirmed cases on the analysis of the epidemic should be ad-dressed.Measures should be taken based on the characteristics of the epidemic to reduce infections.
severe fever with thrombocytopenia syndrome(SFTS)confirmed casesepidemiological characteristicsWei-fang city
NETL
NSTL
万方数据
