Three cases of opportunistic infection caused by propionic acid producing Corynebacterium minutissimum.

Propionic acid producing strains of Corynebacterium minutissimum were isolated from three patients with opportunistic infections. One neutropenic patient was undergoing chemotherapy for prolymphocytic leukemia; the other two patients were undergoing hemodialysis and peritoneal dialysis respectively. An unusual feature of these three strains was their resistance to several antibiotics, which is seldom seen in diphtheroids other than Corynebacterium jeikeium and CDC group D2.