http://blogs.mercola.com/sites/vitalvotes/archive/2004/08/10/Latest-on-the-Cause-of-Acne.aspxPropionibacterium acnes is the bacteria that lives in the skin and is a major cause of acne. Why is this important? Well as most of you know acne affects four out of five adolescents worldwide, as well as many adults with chronic forms of the diseaseenCommunityServer 2008.5 SP1 (Build: 31106.3070)