A case of SFTS coinfected with E. coli bacteremia

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<jats:title>Abstract</jats:title><jats:sec> <jats:title>Background</jats:title> <jats:p>Severe fever thrombocytopenia syndrome virus (SFTSV) is the causative agent of severe fever thrombocytopenia syndrome (SFTS). SFTS is an emerging infectious disease, characterized by high fever, gastrointestinal symptoms, leukopenia, thrombocytopenia, and a high mortality rate. Until now, little importance has been given to the association of SFTS with leukocytosis and bacterial co-infection.</jats:p> </jats:sec><jats:sec> <jats:title>Case presentation</jats:title> <jats:p>A 51-year old man visited our hospital with fever and low blood pressure. He was a farmer by occupation and often worked outdoors. He had a Foley catheter inserted due to severe BPH. Laboratory tests revealed thrombocytopenia, elevated liver function, and elevated CRP levels. He had marked leukocytosis, proteinuria, hematuria, and conjunctival hemorrhage. Initially, we thought that the patient was suffering from hemorrhagic fever with renal syndrome (HFRS). However, we confirmed SFTS through PCR and increasing antibody titer. However, his blood culture also indicated <jats:italic>E. coli</jats:italic> infection.</jats:p> </jats:sec><jats:sec> <jats:title>Conclusion</jats:title> <jats:p>SFTS displays characteristics of fever, thrombocytopenia, elevated liver function, and leukocytopenia. We described a case of SFTS with leukocytosis due to coinfection with <jats:italic>E. coli</jats:italic>. Since patients with SFTS usually have leukocytopenia, SFTS patients with leukocytosis are necessarily evaluated for other causes of leukocytosis. Here, we report the first case of an SFTS with concurrent <jats:italic>E. coli</jats:italic> bacteremia.</jats:p> </jats:sec>

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