Gram-negative folliculitis–a complication of antibiotic therapy in acne vulgaris

Fifty cases of Gram‐negative folliculitis have been identified amongst 1200 new cases of acne vulgaris in a period of 4 years. Two clinical varieties are recognized. Type I, the more common, presents as superficial pustules, usually grouped around the nose and is associated with a lactose fermenting Gram‐negative rod. Type II lesions are characterized by deep nodular and cystic lesions; Proteus appears to be the causative agent. The treatment of this condition is discussed.