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Demodex folliculorum is a microscopic mite that can survive only on the skin of humans. [2] [3] Most people have D. folliculorum on their skin.Usually, the mites do not cause any harm, so are considered an example of commensalism rather than parasitism; [4] but they can cause disease, known as demodicosis.
Demodicosis / ˌ d ɛ m ə d ə ˈ k oʊ s ɪ s /, also called Demodex folliculitis in humans [1] and demodectic mange (/ d ɛ m ə ˈ d ɛ k t ɪ k /) or red mange in animals, is caused by a sensitivity to and overpopulation of Demodex spp. as the host's immune system is unable to keep the mites under control. Demodex is a genus of mite in the ...
Demodex / ˈ d ɛ m ə d ɛ k s / is a genus of tiny mites that live in or near hair follicles of mammals. Around 65 species of Demodex are known. [2] Two species live on humans: Demodex folliculorum and Demodex brevis, both frequently referred to as eyelash mites, alternatively face mites or skin mites. [3] Different species of animals host ...
There are two types of Demodex mites: Demodex folliculorum and Demodex brevis. It’s quite common for all people to have some Demodex mites since they naturally occur on the skin.
Demodex folliculitis is usually caused by an overgrowth of Demodex folliculorum a mite that lives in human hair follicles. Although most people with D. folliculorurm have no symptoms, the mite can reproduce excessively, particularly in people with oily scalps.
The treatment is based upon the hypothesis that parasitic mites of the genus Demodex play a role in rosacea. [38] In a clinical study, ivermectin reduced lesions by 83% over 4 months, as compared to 74% under a metronidazole standard therapy. [ 39 ]
The skin mite Demodex folliculorum produce lipases that allow them to use sebum as a source of food therefore they have a high affinity for sebaceous skin sites. Although it is a part of the commensal skin microbiota, patients affected with rosacea show an increase in D. folliculorum compared to healthy individuals, suggesting pathogenicity. [49]
Demodex brevis is one of the two species of face mite that inhabit humans (the other being Demodex folliculorum). They are about half as long, at 0.15 to 0.2 mm (6 to 8 thousandths of an inch), [1] as D. folliculorum, but otherwise have few differences. Most of the article on Demodex folliculorum applies equally to D. brevis.