Demodicidosis
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).