Group A streptococcus pyogenes causes; • Strep throat a sore, red throat • Scarlet fever- • Impetigo-skin infection • Toxic shock syndrome Necrotizing fasciitis Group B are streptococcus agalactiae group B causes; blood infections, pneumonia, meningitis in newborn. Bacterial disease of the skin and wounds. Acne Pathogen • Commonly found on caused by Propionibacterium acnes. It is Gram- positive, rod-shaped diphtheroid. Which is commonly found on the skin. Normal begins in adolescence.