Factors associated with Severe Fever with Thrombocytopenia Syndrome infection and fatal outcome.
Severe fever with thrombocytopenia syndrome (SFTS) is emerging in China and the incidence increased year by year. In this study, we conducted case control study to explore factors associated with SFTS virus (SFTSV) infection and fatal outcome. In the study of factors associated with SFTSV infection, a total of 216 individuals participated the study, including 72 cases and 144 matched controls. There were significant differences in proportion of history of tick bite and breeding domestic animals between cases and controls. Of note, individuals who were unclear whether they had been bitten by ticks had the highest risk of SFTSV infection and odds ratio (OR) was 10.222. In the study of factors associated with SFTS fatal outcome, a total of 129 cases participated the study including 16 deaths and 113 survivors. Significant differences were observed in body mass index (BMI), intervals from illness onset to confirmation, and proportion of gingival hemorrhage between deaths and survivors, whose ORs of these factors were 3.903, 1.996, and 3.826, respectively. Our results suggest that all patients with fever, thrombocytopenia and leukocytopenia in SFTS endemic areas should be suspected of SFTS, even they don't have history of tick bite, and more intense treatment should be administered to patients with abnormal BMI before laboratory parameters are detected.
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.|State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
Jimin
J
Sun
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Zhenyu
Z
Gong
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Feng
F
Ling
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Rong
R
Zhang
Zhoushan Municipal Center for Disease Control and Prevention, Zhoushan, China.
Zhendong
Z
Tong
Taizhou Municipal Center for Disease Control and Prevention, Taizhou, China.
Yue
Y
Chang
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Enfu
E
Chen
State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
Qiyong
Q
Liu
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Junfen
J
Lin
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Zhiping
Z
Chen
Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China.
Jianmin
J
Jiang
D000368:Aged; D000818:Animals; D000829:Animals, Domestic / Q000821:virology; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D017809:Fatal Outcome; D005260:Female; D005334:Fever / Q000821:virology*; D006801:Humans; D015994:Incidence; D007970:Leukopenia / Q000821:virology; D008297:Male; D008875:Middle Aged; D010217:Phlebotomus Fever / Q000821:virology*; D016856:Phlebovirus / Q000472:pathogenicity*; D012307:Risk Factors; D013921:Thrombocytopenia / Q000821:virology*; D013987:Ticks / Q000821:virology; D014777:Virus Diseases / Q000821:virology*