Non-Toxigenic Penicillin and Cephalosporin-Resistant Corynebacterium diphtheriae Endocarditis in a Child: A Case Report and Review of the Literature.

Reports of invasive disease caused by non-toxigenic Corynebacterium diphtheriae are increasing; however, medical management has not been extensively studied. We describe what we believe is the first documented case of penicillin and cephalosporin-resistant C diphtheriae endocarditis in a child successfully treated with vancomycin, meropenem, and valvular replacement surgery.