The immunology of Propionibacterium acnes and acne.

The majority of recent publications on the immunology of Propionibacterium acnes relate to the potential use of the bacterium as an adjuvant or its use in rodent models of human inflammatory disease. These studies have increased the understanding of the potential effects of Propionibacterium acnes on cells of the mononuclear phagocyte system. Research into the immunology of acne and the role that Propionibacterium acnes plays in inflammatory acne has been limited, with efforts being focussed on the problems of Propionibacterium acnes resistance to antibiotics. Recent studies have indicated that inflammatory acne is a T cell-mediated disease, but whether Propionibacterium acnes is the initial stimulus for either the specific or non-specific recruitment of T cells in acne lesions is still a matter for conjecture.