Dust mites

• What is a dust mite?
• Varieties of potentially dangerous dust mites for humans

Man constantly interacts with other living organisms, including the simplest ones - microbes, bacteria, parasites. Some of them trigger pathogenic processes in our body, without some, the normal vital activity is impossible, and the third category is formed by the so-called conditionally pathogenic organisms, whose harm occurs only under certain circumstances.

No matter how careful and selective you are to the external environment, you can not completely isolate yourself from the negative influence of parasites. This is not a guide to inaction, since compliance with maximum hygiene reduces the risks of undergoing dangerous interactions to a minimum.

What measures should be taken to destroy nearby dust mites? What harm do they have for the body and why do they go unnoticed by many people?

What is a dust mite?

Dust mites are synanthropic, that is, living next to humans, organisms that are classed as arachnids. Biologists among dust mites distinguish pyroglipid and dermatophagoid, and in their average apartment can be found three of their groups - pyroglyphic and some species of granary, mites, predators, eating pyroglyphs, random, penetrated from the outside, unable to reproduce in house dust.

The mite of house dust is an insect insubstantial to the naked eye, 0.1-0.5 mm in size, whose average life cycle is 60-80 days, for which the female mite lays up to 60 eggs. Dust mites live in an environment with an air temperature of about 22-26 ° C and humidity of more than 55%, and the nutrient base is provided by woolen fibers of blankets, blankets, carpets, furniture upholstery and dead cells of human skin, which makes the tick dependent on the person who Normally loses up to 1.5 grams of particles of the epidermis.

The products of the mites are feces containing digestive enzymes (proteins Der f1 and Der p1). The tick, along with their excrement, contains domestic dust, in a variety of quantities contained in pillows, mattresses, bedspreads, upholstered furniture, paper books and other interior elements and household items.

Varieties of potentially dangerous dust mites for humans:

• Barn clamps - are irritants for the skin, eyes, other organs; Sensitization to various granary mites in patients with bronchial asthma sometimes reaches 20%;
• Flour mite Acarus siro L. - a source of allergens Asa s13, causes allergy first among agricultural workers, flour-milling and bakery production, lives in food products, straw;
• Dark-legged tick Aleuroglyphus ovatus Troup. - the source of allergens in flour and moist in grain;
• Cheese mite Tyrolichus casei - the environment is cheese, grain, grain products, seeds of some plants, dried fruits, has a high risk of penetration into the gastrointestinal tract with food, which can cause allergic reactions;
• An extended tick Tyrophagus putrescentiae (Schrk) - lives in barns and granaries, in grain stocks, various seeds, flour and other plant products, found in cheese and meat products; Source of allergens Tyr p2;
• Tick ​​Rodionova Caloglyphus rodionovi Zachv. - lives in flour and grain, contact and inhalation of metabolites, ingestion into the gastrointestinal tract with food can cause allergic reactions;
• Smooth mite Chortoglyphus arcuatus Troup. - lives in flour, grain, seeds, in hay and old straw, in contact with which a person starts the mechanism of allergy development;
• Ticks of the genus Blomia - live both in human dwellings and in barns, sources of allergens Blo t15, Blo t12, Blo t13;
• Hairy mite Glycyphagus destructor Schrk. - lives in stocks of grain, cereals, oilseeds, dried fruits, in hay, straw; Source of allergens Lep d2, Lep d5, Lep d7, Lep d10, has a high risk of allergic reactions when it comes into contact or inhalation of an infected substrate ;
• Hairy house tick Glycyphagus domesticus De Geer. - lives in houses, barns on products, it is he who causes acarodermatitis in people, known as "scabies of grocers";
• Brown bread mire Gohieria fusca Ouds. - lives in stocks of flour, wheat, by contact and inhalation of metabolites in people with a genetic predisposition to atopy, the risk of developing an allergic reaction is high;
• Wine mite Carpoglyphus lactis L. - lives on substrates containing lactic, acetic or succinic acid, contact with which and can provoke an allergy;
• Dermatophagoides pteronyssinus Trouss. - representative of a complex of allergenic mites of house dust; Lives in bed, upholstered furniture, carpets, etc., causes sensitization in persons genetically predisposed to atopy, which ultimately can result in bronchial asthma, allergic rhinitis and atopic dermatitis;
• Pot-bellied tick Ruemotes ventricosus Newp. - ectoparasite of larvae of various insects; Are dangerous for persons in contact with substrates containing infected insect larvae, for example, when threshing, storing or loading grain, packing medicinal herbs, using straw mattresses; Multiple bites of such ticks are manifested by itching and severe skin irritation, and the ingestion of antigens of a paunchy tick in the human body by respiratory path causes the development of asthma and urticaria.
• Dermatophagoides farinae (Hughes). - lives in the dwelling of a person (as in house dust, and in flour, cereals, etc.); The second most important kind of allergenic house dust mites after the above named;
• Tydeus molestes (Moniez) - when mass multiplication cause severe skin irritation, dermatitis in humans and domestic animals;