Commonest cause of acute folliculitis (hair follicle infection) is: (A) Staphylococcus aureus, (B) Beta hemolytic streptococcus, (C) Propionibacterium acnes, (D) Streptococcus viridans
Answer is A. Acute folliculitis are of two types: superficial and deep. The most common causative organism is Staphylococcus aureus. Superficial folliculitis is also caused by Pseudomonas aeruginosa.Reference : page 41 IADVL's Concise Textbook of Dermatology