亚急性感染性心内膜炎(SIE)多由草绿色链球菌引起,液化沙雷氏菌作为SIE的病原菌少见,现报道1例.患者女,27岁,因反复心悸气促1年;加重伴发热20天入院.体检:体温38.2℃,脉搏110次/min,呼吸24次/min,血压17/8KPa,神清;端坐呼吸,中度贫血貌;左睑结膜及上齿龈粘膜分别可见2个瘀点,腹部皮肤见4个瘀点,颈静脉稍怒张,双肺(一),心界向左明显扩大;心率110次/min, Subacute infective endocarditis (SIE) are mostly caused by Streptococcus viridans, Serratia liquefaciens is rare as a pathogen of SIE and is reported in one case. Female, 27 years old, With fever 20 days admitted to hospital Physical examination: body temperature 38.2 ℃, pulse 110 beats / min, breathing 24 times / min, blood pressure 17 / 8KPa, Shen Qing; sitting breathing, moderate anemia appearance; left conjunctiva and upper gingival mucosa were seen 2 petechiae, abdominal skin see 4 petechiae, a little jugular jugular, lung (a), heart left significantly expanded; heart rate 110 beats / min,