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Case 199. Demodex folliculorum colonization (27 y-o M)
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| Incidental biopsy findings of mite colonization in the hair follicle adjacent to the nevus of the facial skin |
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Key words : Demodex folliculorum, Demodex brevis, acne demodecica
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| Two mites are seen in the infundibulum of the hair follicle. Four pairs of legs and basophilic granular material in the body are recognized (HE). | IgD is speficically deposited on the surface of the mite (immunostaining). IgG, IgA, IgM and IgE are negative. Deposition of α-1 antitrypsin and α-1 antichymotrypsin are also observed. | |
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| Reference case 199A Demodex brevis among the sebaceous gland in the facial skin of a 34 y-o male (HE). A cut surface of a small mite with granulated cytoplasm. D. brevis parasitizes at the level of sebaceous gland lumen. |
Reference case 199A Demodex brevis among the sebaceous gland in the facial skin of a 34 y-o male (PAS). The mite is rich in glycogen. The number of mites increases in case of acne demodecica. Steroid administration accelerates infestation. |
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