Mite

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Mites, along with ticks, belong to the subclass Acarina (also known as Acari) and the class Arachnida. Mites are among the most diverse and successful of all the invertebrate groups. They have exploited an incredible array of habitats, and because of their small size (most are microscopic) most go totally unnoticed. Many live freely in the soil or water, but there are also a large number of species that live as parasites on plants or animals and even some that feed on mold.

Some of the plant pests include the so called spider mites (family Tetranychidae), thread-footed mites (family Tarsonemidae), and the gall mites (family Eriophyidae). Among the species that attack animals are members of the Sarcoptic Mange mites (family Sarcoptidae), which burrow under the skin. Demodex mites (family Demodicidae) are parasites that live in or near the hair follicles of mammals, including humans. Perhaps the best-known mite, though, is the house dust mite (family Pyroglyphidae).

Insects may also have parasitic mites. Examples are Varroa destructor which attaches to the body of the honeybee, and Acarapis woodi (family Tarsonemidae), which lives in the tracheae of honey bees. There are hundreds of species of mites associated with other bee species, and most are poorly described and understood. Some are thought to be parasites, while others beneficial symbionts.

There are over 45,000 described species of mites[2]. Scientists believe that we have only found 5% of the total diversity of mites. Mites are believed to have existed for around 400 million years.

The scientific discipline devoted to the study of ticks and mites is called acarology.

The tropical species Archegozetes longisetosus is one of the strongest animals in the world, relative to its mass (100 μg): It lifts up to 1182 times its own weight, over five times more than would be expected of such a minute animal (Heethoff & Koerner 2007).

Systematics

For the systematics of mites, see Acarina.

Allergy

Mites cause several forms of allergic diseases, including hay fever, asthma and eczema and also aggrevates atopic dermatitis. ^[1] Mites are usually found in warm and humid locations, including beds. It is thought that inhalation of mites during sleep exposes the human body to some antigens which eventually induce hypersensitivity reaction.^[1] Dust mite allergens are thought to be among the heaviest dust allergens.^[1]

Like most of the other types of allergy, treatment of mite allergy starts with avoidance. There is a strong body of evidence showing that avoidance should be helpful in patients with atopic dermatitis triggered by exposure to mites.^[1] Regular washing of mattresses and blankets with hot water can help in this regard.^[1] Antihistamines are also useful; Cetirizine, for example, is shown to reduce allergic symptoms of patients.^[1]

References

• Heethoff, M. & Koerner, L. (2007): Small but powerful - The oribatid mite Archegozetes longisetosus Aoki (Acari, Oribatida) produces disproportionate high forces. J. Exp. Biol. 210(17): 3036-3042. doi:10.1242/jeb.008276 (Abstract)

External links

• Bitingmites.org: What's biting you?
• PARASITIC MITES OF HUMANS University of Kentucky
• Red velvet mite - Trombidium sp. diagnostic photographs
• Worldwide honey bee decline due to mite infestations - article, photographs
• Control of the citrus rust mite hosted by the UNT Government Documents Department

Rust Mite, Aceria anthocoptes.jpg Rust mite Aceria anthocoptes	Flat mite, Brevipalpus phoenicis.jpg Flat mite Brevipalpus phoenicis	House dust mite Dermatophagoides pteronyssinus	Yellow mite (Tydeidae), Lorryia formosa.jpg Yellow mite Lorryia formosa
Yellow mite Lorryia formosa	MitesMassing.jpg Plant mites forming a reproductive colony	Trombidium.spec.1706.jpg Velvet mite

de:Milbeneo:Akaro

fr:Acari gl:Ácaro it:Acari he:קרדית אבק הבית nl:Mijten ja:ダニ no:Midderfi:Punkit sv:Kvalsteruk:Кліщі

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .