Demodex mites are minuscule creatures that reside in and around hair follicles. These mites are a part of the Demodex genus and are commonly found in humans. While almost everyone has these mites, their population size can vary based on several factors. In small quantities, Demodex mites typically do not cause any noticeable symptoms. However, as their numbers increase, they can worsen existing skin problems or even initiate new skin conditions.
Notable Species
Human Demodex infestations are caused by two species of mites, namely Demodex folliculorum and Demodex brevis. Although both species are often referred to as “eyelash mites,” it is important to note that only D. folliculorum inhabits the eyelashes. On the other hand, D. brevis resides in the oil glands connected to small hair follicles. D. folliculorum feeds on skin cells, whereas D. brevis consumes gland cells. It is worth mentioning that both mites are not visible to the naked eye.
Who is Affected by Mites?
While newborns are free from mites, their exposure increases as they come into contact with other individuals. Studies suggest that approximately one-third of children and young adults, half of all adults, and as many as two-thirds of older adults carry these microscopic creatures. It is believed that the higher prevalence in older adults may be a result of the continuous accumulation of mites or due to increased sebum production in adults. Furthermore, advancements in technology and examinations of cadavers have revealed that the current statistics may not accurately depict the true extent of mite infestations.