Ticks and tick-borne diseases · 2025
Effective control of severe fever with thrombocytopenia syndrome in Daishan County, a former epicenter in Zhejiang Province, Southeast China.
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Tan Qilong, Fu Shuqin, Shu Jiwei, Liu Ying, Lou Yihan, Hu Mingxing, Zhang Sen, Sun Jimin, Ren Jiangping
Аннотация
BACKGROUND: Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infectious disease with high case fatality rate. In 2016, a series of community-based comprehensive measures were put into effect in Daishan. This study was conducted to explore the change in the epidemiology of SFTS following the implementation of those measures..
METHODS: Descriptive and statistical analyses were conducted to characterize the epidemiology of SFTS.
RESULTS: In total, 156 cases were reported in Daishan during 2011-2023, with the average annual incidence rate of 66.58 per million. The incidence increased with age, and the case fatality rate was significantly higher among the cases over 65 years (P < 0.050). After the implementation of the community-based comprehensive measures in 2016, the incidence was remarkably declined from 2015 to 2019 (Annual Percent Change [APC] = -39.98, P < 0.001) and remained relatively stable without significant alteration between 2019 and 2023 (APC = 15.77, P = 0.156), which was in contrast to the trends in Zhejiang and Mainland China. The hospital type that was most frequently visited for the initial medical-seeking shifted from type I (59.26 %) in 2011-2016 to type II (56.52 %) in 2017-2023. The time intervals between first-visiting and confirmation, onset and confirmation were shortened in the period of 2017-2023 (P < 0.001). Consequently, the case fatality was insignificantly reduced (8.70 % vs. 20 %, P = 0.084).
CONCLUSIONS: The community-based comprehensive measures are highly efficacious in the containment of SFTS.
METHODS: Descriptive and statistical analyses were conducted to characterize the epidemiology of SFTS.
RESULTS: In total, 156 cases were reported in Daishan during 2011-2023, with the average annual incidence rate of 66.58 per million. The incidence increased with age, and the case fatality rate was significantly higher among the cases over 65 years (P < 0.050). After the implementation of the community-based comprehensive measures in 2016, the incidence was remarkably declined from 2015 to 2019 (Annual Percent Change [APC] = -39.98, P < 0.001) and remained relatively stable without significant alteration between 2019 and 2023 (APC = 15.77, P = 0.156), which was in contrast to the trends in Zhejiang and Mainland China. The hospital type that was most frequently visited for the initial medical-seeking shifted from type I (59.26 %) in 2011-2016 to type II (56.52 %) in 2017-2023. The time intervals between first-visiting and confirmation, onset and confirmation were shortened in the period of 2017-2023 (P < 0.001). Consequently, the case fatality was insignificantly reduced (8.70 % vs. 20 %, P = 0.084).
CONCLUSIONS: The community-based comprehensive measures are highly efficacious in the containment of SFTS.