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Escherichia coli ( E. coli ) is a rare cause of infective endocarditis, despite being a common cause of bacteremia. E. coli endocarditis affects most frequently immunocompromised elderly women, especially those with diabetes mellitus. We present a case of a 78-year-old female immunocompetent patient, presenting with septic shock and multiple organ dysfunction syndrome. E. coli was isolated in all sets of blood cultures and in urine culture and a contrast-enhanced abdominal computed tomography (CT) scan revealed spleen and left kidney infracts. Transthoracic echocardiography revealed a large (&gt; 15 mm) mobile mass on the atrial side of the posterior mitral valve leaflet. The patient was initially treated with intravenous ceftriaxone and ciprofloxacin for 2 weeks with successful clinical response and clearance of bacteremia, was then subjected to valve replacement (with isolation of E. coli from replaced valve cultures) and continued antibiotic therapy for additional 4 weeks postoperatively. E. coli has emerged in recent years as an important cause of bacteremia, especially in the elderly. In selected patients, as those with persistent Gram-negative bacteremia or severe sepsis/septic shock, echocardiography is of paramount importance for the diagnosis of Gram-negative endocarditis and should be included in our diagnostic algorithm of patient's evaluation.

Escherichia coli Endocarditis Presenting With Septic Shock in an Immunocompetent Female Patient