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Gram negative folliculitis
What is gram negative folliculitis?
Gram negative folliculitis is an acne-like disorder caused by a bacterial infection. Gram negative bacteria include Escherichia coli, Pseudomonas aeruginosa, Serratia marcescens, Klebsiella and Proteus species.
The term Gram negative
refers to the staining pattern of the organisms in the laboratory. Certain bacteria do not take up a stain known as Gram
.
Gram negative folliculitis may result from long term treatment with tetracycline or topical antibiotics.
What does it look like?
Gram negative folliculitis is a pustular rash resembling acne. However most of the lesions are pustules with relatively few papules and comedones.
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Treatment
Gram negative folliculitis usually clears promptly with:
- Antibiotics to which the organisms are sensitive (e.g. ampicillin, trimethoprim)
- Isotretinoin