<prompt> All are true about propionibacterium acne exceptNormal flora of skinGram negativeCan be found in GITCauses acne vulgaris  <response>: Propionibacterium acnes P. acnes Gram ve anaerobic rod, resident flora in follicle but acne patients with higher concentration Naturally produces porphyrins coproporphyrin III, which is the target of light-based acne therapy Secretes lipases which cleave lipids in sebum into pro-inflammatory free fatty acids FFAs, which are both comedogenic and chemotactic Bindsactivate toll-like receptor 2 TLR2 Causes Acne vulgaris. Ref:- Sima Jain; pg num:- 96 