Four-valve endocarditis caused by corynebacterium CDC group I1.

I have reported a case of fulminant four-valve endocarditis in an intravenous drug abuser caused by the unusual Corynebacterium CDC group I1. Corynebacteria generally cause endocarditis only on damaged and prosthetic valves; fewer than ten cases have been reported on previously normal valves and fewer still in drug abusers. This is the first reported case of endocarditis caused by Corynebacterium CDC group I1.