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A Case of Streptococcus thoraltensis Bacteremia and Prosthetic Valve Endocarditis in a 68-Year-Old Vietnamese Man

Management of emergency care, Rare disease

Pham Dang Hai, Pham Nguyen Son, Nguyen Thi Thu Huong, Nguyen Thanh Binh, Le Thi Viet Hoa, Nguyen Manh Dung

Vietnam Intensive Care Unit (ICU), 108 Military Central Hospital, Hanoi, Vietnam

Am J Case Rep 2020; 21:e925752

DOI: 10.12659/AJCR.925752

Available online: 2020-10-07

Published: 2020-11-20

BACKGROUND: Streptococcus thoraltensis is a rare cause of human disease. This report describes a patient with infective endocarditis caused by S. thoraltensis and complicated by ischemic stroke.
CASE REPORT: A 68-year-old man was admitted for a 12-day duration of fever. He had a history of severe aortic valve stenosis, for which he underwent prosthetic valve replacement, and type 2 diabetes mellitus. Echocardiography revealed vegetation attached to the right coronary cusp of the prosthetic aortic valve and rupture of the sinus of Valsalva into the right ventricle. Blood cultures were positive for S. thoraltensis. He experienced an ischemic stroke involving the vegetation of the aortic valve and died of acute heart failure.
CONCLUSIONS: S. thoraltensis may be considered an emerging pathogen in patients with infective endocarditis.

Keywords: Communicable Diseases, Emerging, Endocarditis, Sepsis