🐛Demodex a tiny mites that live in or near hair follicles of mammals. Around 65 species of Demodex are known, 2 species live on humans: Demodex folliculorum and Demodex brevis, both frequently referred to as eyelash mites.
The adult mites are only 0.3–0.4 mm (0.012–0.016 in) long, with D. brevis slightly shorter than D. folliculorum. Each has a semitransparent, elongated body that consists of two fused segments. Eight short, segmented legs are attached to the first body segment. The body is covered with scales for anchoring itself in the hair follicle, and the mite has pin-like mouth parts for eating skin cells and oils (sebum) which accumulate in the hair follicles. The mites can leave the hair follicles and slowly walk around on the skin, at a speed of 8–16 mm (0.31–0.63 in) per hour, especially at night, as they try to avoid light. The mites are transferred between hosts through contact with hair, eyebrows, and the sebaceous glands of the face.