Gram Negative Folliculitis

Key Points
Skin condition similar to acne in appearance
Caused by bacterial infection
Consists of pustules, often red in color

Gram negative folliculitis is a skin condition which appears similar to acne. It consists of a red rash of pustules in any area with hair, most commonly the face. Unlike acne, there are usually no comedones or papules involved in its presentation.

Gram negative folliculitis is caused by an infection by bacteria which are gram negative, meaning it does not take a stain in laboratory testing. These bacteria include escherichia coli, pseudomonas aeruginosa, serratia marcescens, klebsiella and proteus species. Gram negative folliculitis may also occur related to long-term use of tetracycline or topical antibiotics.

Differential Diagnosis (Other conditions with similar appearance)
Acne Vulgaris
Acneiform Eruptions
Perioral Dermatitis

Diagnosis
Key Points
Diagnosis based on skin appearance
Other tests may be performed to confirm diagnosis

Gram negative folliculitis is usually diagnosed based on appearance of the affected area. Health care professionals may perform gram stains and cultures to confirm the diagnosis.

Treatment
Clear quickly with proper treatment
*Primary treatment involves the prescription of Antibiotics or Isotretinoin

Gram negative folliculitis is easily and quickly treated. Once the causal organism is identified, the antibiotic which the organism is most vulnerable to will be prescribed to rid the affected person of the infection. Isotretinoin, a prescription acne medication, is often also used to treat gram negative folliculitis. Once treatment is begun, the condition clears quickly.