“…Since Halpern et al [21] reported that Corynebacterium parvum stimulated the carbonclearing activity in mice, it has been known that anaerobic coryneforms including C. parvum, Corynebacterium acnes and Corynebacterium granulosum showed several biological activities, such as antitumor action [10,13,16,18,20,26,35], adjuvant action in immune response [23,29,33,34,38,40], resistance to bacterial infection [2,11,19] and enhancement of histamine sensitivity in animals [1]. Anaerobic coryneforms inhabit the skin, oral cavities, intestines or vaginas of humans, and some of them may be isolated from comedones, pustules and acne vulgaris lesions.…”