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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 ...
The individual mites remain external to the epidermis within the follicle, but appear to be within the skin because they are below the general outer surface of the host. The mite Demodex canis is a common cause of demodicosis in dogs. Demodex mites are microscopic, cigar-shaped and have very short legs. These mites seem to feed on epidermal cells.
The parasite Demodex folliculorum (D. folliculorum) causes blepharitis when the parasite is present in excessive numbers within the dermis of the eyelids. These parasites can live for approximately 15 days. The parasites (both adult and eggs) live on the hair follicle, inhabiting the sebaceous and apocrine gland of the human lid. Direct contact ...
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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 ...
Mange (/ ˈ m eɪ n dʒ /) is a type of skin disease caused by parasitic mites. [1] Because various species of mites also infect plants, birds and reptiles, the term "mange", or colloquially "the mange", suggesting poor condition of the skin and fur due to the infection, is sometimes reserved for pathological mite-infestation of nonhuman mammals.
In one hour, D. folliculorum can travel 8 to 16 mm (0.31 to 0.63 in); [9] they usually travel at night. [9] The mites are obligate commensals of humans, [7] and can live only on the skin; they soon dry out and die if they leave the host. [10] Higher numbers of D. folliculorum are found in the spring and summer than at other times of year. [10]
Damaged sweat and sebaceous glands, hair follicles, muscle cells, and nerves are seldom repaired. They are usually replaced by the fibrous tissue. The result is the formation of an inflexible, fibrous scar tissue. Human skin cells are capable of repairing UV-induced DNA damages by the process of nucleotide excision repair. [2]