Peptostreptococcus ivorii-associated skin abscess in a HIV-infected patient

Peptostreptococcus ivorii, a recently described species of gram-positive anaerobic coccus, has so far rarely been found in human infections. The isolation of this anaerobe from a polybacterial skin abscess in a HIV-infected patient, which formed after antiretroviral therapy had been discontinued is reported. Local treatment led to the abscess healing without specific antibiotics. As the type strain was isolated from a mixed infected leg ulcer, Peptostreptococcus ivorii could play an important role in synergistic infections of the skin.