Abstract: Severe fever with thrombocytopenia syndrome virus（SFTSV） is a newly identified hemorrhagic fever virus.The clinical manifestations of patients infected with this virus include fever，leukocytopenia，thrombocytopenia，and multiple organ failure.From 2010 to October 2016，the national average mortality rate of SFTSV infection was 5.3%，and that of critically ill infected patients reached 25%.There are no drugs particularly effective for SFTSV.To reduce the mortality effectively，the key lies in early diagnosis，and early identification of critically ill infected patients，and timely application of support treatment.We reviewed the clinical features of critically ill patients with severe fever with thrombocytopenia syndrome，in order to help clinicians identify such patients as early as possible to improve the prognosis，and reduce the mortality，

Key words: Thrombocytopenia, Fever, Severe fever with thrombocytopenia syndrome virus, Disease attributes

摘要： 发热伴血小板减少综合征病毒是一种新发现的出血热病毒，患者感染后表现为发热、白细胞计数减少、血小板计数减少及多器官功能衰竭等。2010年—2016年10月全国感染该病毒的患者平均病死率为5.3%，其中危重症患者病死率高达25%。发热伴血小板减少综合征病毒感染没有特效治疗药物，关键在于及早诊断，早期识别重症患者并对症支持治疗，从而有效降低病死率。本文就重症发热伴血小板减少综合征的临床特征展开综述，以利于临床医生早期识别重症患者，降低病死率，改善预后。

关键词: 血小板减少, 发热, 发热伴血小板减少综合征, 疾病特征