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Cardiac magnetic resonance imaging for detection of an abscess associated with prosthetic valve endocarditis: a case report.

Propionibacterium acnes is an organism frequently isolated in cultures and often dismissed as a contaminant. A patient with a febrile illness and prosthetic aortic valve was suspected of having infectious endocarditis. Magnetic resonance imaging was useful in defining a paravalvular abscess associated with prosthetic valve endocarditis due to Propionibacterium acnes that was then successfully surgically repaired.