Objective To investigate the epidemiological characteristics and medical consultation status of severe fever with thrombocytopenia syndrome (SFTS) in Jinhua, Zhejiang Province, China, 2019-2023, so as to provide a reference for the prevention and control of SFTS in Jinhua. Methods The information of 84 SFTS cases in Jinhua from 2019 to 2023 was collected. The temporal, spacial, and demographic distributions of SFTS cases were examined using descriptive statistics. Excel 2016 and SPSS 27.0 softwares were used for statistical analysis. Factors influencing the incidence rate and fatality rate of SFTS were identified using independent samples t test and Chi-square test. ArcGIS 10.8 software was used to draw a map of the number of cases at the county (city, district) level. Results From 2019 to 2023, the average incidence rate and fatality rate of SFTS in Jinhua were 0.26/100 000 and 26.19%, respectively. The male-to-female ratio of the 84 cases was 1.05:1, with no significant difference in the cumulative incidence between males and females (χ2=0.008, P=0.928). Most cases occurred in middle-aged and elderly farmers, with a mean age of (65.46±10.07) years, and farmers accounted for the majority of the cases (88.10%). SFTS cases were reported in eight counties (cities, districts) except Wuyi County. The top three counties (cities, districts) with the highest number of cases were Dongyang (35.71%), Yiwu (21.43%), and Lanxi (20.24%). The incidence of SFTS in Jinhua was concentrated in summer and autumn, with the number of cases reported from April to October accounting for 95.24% (80/84) of the total number of reported cases, peaking from May to July (64.29% of total cases). There was no significant difference in case fatality rate between males and females (χ2=0.017, P=0.897). The average age of fatal cases was higher than that of survivors (t=2.817, P=0.006). The fatality rate was higher in patients aged ≥70 years compared to those aged 40- <60 years (χ2=8.255, P=0.016). The M (P25, P75) from onset to first visit, from onset to diagnosis, and from first visit to diagnosis were 2.00 (1.00, 4.00) d, 6.50 (5.00, 9.00) d, and 4.00 (2.00, 6.00) d, respectively. Conclusions The SFTS cases in Jinhua predominantly occurred among middle-aged and elderly farmers, with obvious seasonality and high fatality rate. Advanced age is a key risk factor for the case fatality rate of SFTS.
LI Pei-zhen, MA Yue, LI Jia-cheng, FU Qiong-yao, SUN Mei-jiao
. Epidemiological characteristics of severe fever with thrombocytopenia syndrome in Jinhua， Zhejiang Province， China， 2019-2023[J]. Chinese Journal of Vector Biology and Control, 2025
, 36(2)
: 190
-194
.
DOI: 10.11853/j.issn.1003.8280.2025.02.009
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