[Raw meat, lots of problems: rare infection in a patient after mechanical valve replacement and liver transplantation].

We report about a 43-year-old man who presented to the emergency department in septic shock with nonspecific gastrointestinal symptoms. Sonography and computed tomography (CT) could not identify the location of the infection in the patient who had undergone liver transplantation and has a mechanical mitral valve. Blood cultures were positive for Listeria monocytogenes. Transesophageal echocardiography showed prosthetic endocarditis. The findings regressed markedly under ampicillin.