What is gram-negative folliculitis?

Updated: Aug 07, 2019
  • Author: Mordechai M Tarlow, MD; Chief Editor: William D James, MD  more...
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Answer

Gram-negative folliculitis, first described by Fulton et al in 1968, [1] is an infection caused by gram-negative organisms. The infection may occur as a complication in patients with acne vulgaris and rosacea and usually develops in patients who have received systemic antibiotics for prolonged periods. [2] Gram-negative folliculitis should be considered in patients with acne who have a flare-up of pustular or cystic lesions and in patients whose acne is resistant to treatment. Gram-negative folliculitis may also occur in the setting of hot-tub immersion and in people infected with HIV. Note the image below.

Pseudomonas folliculitis. Courtesy of Hon Pak, MD. Pseudomonas folliculitis. Courtesy of Hon Pak, MD.

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