DEMODICIDOSIS
DEMODICIDOSIS ICD-10: B88.0
Demodex species are human face mites, part of the human cutaneous microbiome. D. folliculorum resides in hair follicles; D. brevis, infundibulum of sebaceous glands. Mites do not invade tissue. Site of habitation usually symptomatic. In some cases, this causes an inflammatory reaction (demodicidosis) that occurs with lesions resembling rosacea, suppurative folliculitis, or perioral dermatitis (Fig. 28-15).
• Treatment. Topical ivermectin, permethrin; in severe cases oral ivermectin 200 µg/kg.
A B
C D
FIGURE 28-15 • Demodicidosis A 25-year-old woman noted facial rash the day after a heavy workout. (A) Tender red papules on the face. Lesions look like papular rosacea. (B) Microscopic examination of curetting of papule demonstrates Demodex mite. Lesions resolved with oral ivermectin. (C,D) A 42-year-old man with 1- to 2-mm papules and pustules with background confluent erythema and slight scale of the face. Evaluation of pustule contents under microscopy confirmed Demodex mite.