Corynebacterium propinquum: A confounding case of infective endocarditis.

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Often dismissed as contaminants in blood cultures, Corynebacterium species can also cause infective endocarditis, a severe condition. We report an unusual case of Corynebacterium propinquum endocarditisin a non-immunocompromised individual on a native valve. Conflicting clinical and microbiological data led to 16S ribosomal sequencing to confirm the causative agent. Our case illustrates C. propinquum as a cause of infective endocarditis, and it demonstrates the utility of ancillary moleculardiagnostic techniques to identify etiologic agents in difficult cases of infective endocarditis. C.propinquum should be recognized as a potential cause of infective endocarditis even on a native valve.