Most mites never ever come in call with humans, but some that execute can impact a person’s health. Yet, in many instances where mites or various other “invisible” arthropods are believed to be biting or “attacking” people, no causative biology is present. The irritation may be real or imagined: real, due to mechanical, chemistry or other inanimate irritants, or imagined due to a emotional disorder.

While mites seldom transmit an illness to human beings in the joined ubraintv-jp.coms, lock definitely influence health in methods that variety from simply being a nuisance when they enter residences in big numbers, come inflicting significant skin irritation the can reason intense itching. The most generally encountered mites, including those that deserve to adversely affect human health, are detailed below.

CLOVER MITES (Bryobia spp.)

This mite periodically enters homes and other buildings by the thousands, bring about panic among residents. Though they do not bite or cause health-related problems, clover mites have the right to be a nuisance. If smashed once they crawl end carpets and also drapery, the mites leaving a red stain. Clover mites deserve to be red, environment-friendly or brown, and also have prior legs that are about twice as long as their other legs. They feeding on clover, ivy, grasses, fruit trees and also other plants. Well-fertilized lawns are favored. Clover mites enter dwellings when their food plants are gotten rid of or dry up. They room most active in fall, and also will look for refuge in structures as cooler weather approaches, once molting (shedding skin) and also when laying eggs. Common of plenty of mite species, every clover mites room females qualified of laying viable egg without fertilization. They have actually no need for male mites!

HOUSE DUST MITES (Dermatophagoides spp.)

Much details (and misinformation) has showed up in current years around house dust mites. Virtually invisible to the naked eye, home dust mites are nonetheless real. It has actually been presented that, like cockroaches, dust mites and their feces can become airborne and are among the most typical indoor allergens. The is, many persons diagnosed as being allergic to “house dust” room actually allergy to the dust mites whose bodies and feces are significant components that dust. Roaches and also dust mites have also been implicated in triggering asthma attacks. But, unlike rodent mites, itch mites and chiggers, skin wake up is rarely led to by exposure to dust mites. Although they might “hitchhike” ~ above clothing, dust mites perform not live on people. Castle feed mostly on dander, flakes that dead skin that autumn from people and also animals. Upholstered furniture, pillows and mattresses generally harbor an ext dust mites than carpeting.

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ITCH MITES (Pyemotes spp.)


These mites food upon insects. Varieties including the straw itch mite (P. Tritici) infest save products. Human beings are bitten when they contact straw, hay, grasses, leaves, seed or comparable materials harboring the mites. Another species (P. Herfsi) likewise attacks insects life in sheltered locations, including the larvae of midges (gnat-like flies) in sheet galls, and the eggs of cicadas in ~ tree bark. Once separated from your insect prey, itch mites may contact and bite other pets including humans.

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The mites cannot be seen and also the bites are not felt, however leave itchy red point out that can resemble a skin rash. When itch mite populaces ‘explode,’ people and other animals may receive numerous bites. Fortunately, the mites cannot live on humans, perform not survive indoors, and are not well-known to transmit disease.

A: engorged itch mite
B: female before feeding

RODENT and also BIRD MITES (Liponyssoides sanguineus, Laelaps echidnina, Ornithonyssus spp., Dermanyssus gallinae, Cheyletiella spp.)

Rodent and also bird mites might bite world when your hosts dice or abandon their nests. Three varieties of rodent mites easily bite humans: the house mouse mite (Liponyssoides saguineus), spiny rat mite (Laelaps echidnina) and also tropical rat mite (Ornithonyssus bacoti). The home mouse mite prefers come suck the blood the mice, but likewise will bite rats and people, often causing a rash roughly the bite. Lock prefer heat places (e.g., about pipes and also furnaces) whereby rodents live. The spiny rat mite feeds on rats at night and also hides by work in cracks and also crevices about rat nests and also resting places. The tropic rat mite’s bite is painful and causes skin irritation and also itching.

Mites that generally infest birds likewise bite people. The northern fowl mite (Ornithonyssus sylviarum) and chicken mite (Dermanyssus gallinae) mostly infest chickens, but additionally pigeons, starlings and sparrows. The northern fowl mite cannot survive for more than a month off its host, when the chicken mite hides in cracks and crevices close to bird swarms during the day and feeds by night. Cheyletiella mites infest both birds and mammals. They may prey on other mites and insects living on the host’s skin. Lock can cause a mange-like condition in pets, and also itching in people who manage infested pets. They do not stay long on humans.

CHIGGERS (Eutrombicula spp.)

Two types of chigger mites strike humans and other mammals, birds and also reptiles. The nymph and also adult stages prey on insects. That is the six-legged larval phase that frequently feeds ~ above rodents or floor dwelling birds however will bite people when they room available. Chigger larvae are red come yellow in color and also appear as scarcely visible specks. When they recognize the carbon dioxide exhaled by an animal, they rise on floor or vegetation and wave their front foot to call it, then master it with their mouthparts. They execute not suck blood but cut right into the skin, inject skin-digesting saliva and suck increase the liquefied skin. If no dislodged, the chigger will feed for numerous days. The bite i do not care inflamed, hardens and also itches. Chiggers spend most of their lives in crack in the soil. Castle are generally found in rural, much less disturbed areas, yet can persist for years on floor in new subdivisions.

SCABIES MITES (Sarcoptes scabiei)

Sarcoptes scabiei room mites the infest mammals, consisting of man. Most human infestations result from person-to-person contact. Return they can transfer from animals to humans and vice versa, several species of scabies mites exist, each having a desired host species on which it reproduces. In dogs, scabies mites cause mange. Scabies is the most common and important problem resulting native mite infestation that humans. Unlike various other mites, scabies mites in reality burrow and also produce tunnels one centimeter or an ext in size just below the surface ar of the skin, in i m sorry they lay eggs. The mites are thought to feeding on skin and also secretions. The whole life bike (10-17 days because that human-infesting scabies mites) is spent on their host. There is no a host, they survive just a few days. In previously unexposed individuals, a scabies infestation may go unnoticed for more than a month. Then, severe irritation and also itching develops, specifically at night.


The an initial step in determining the true reason of irritations that may involve mites is come thoroughly examine the premises and also identify any type of organisms discovered. The simple fact that all mites are tiny creatures, some so little they deserve to be seen only with magnification, regularly makes inspection and also identification difficult. Likewise, mites that impact humans room a varied group, every with an extremely different habits, every one of which investigators need to be aware.

Seek medical attention when exposure to mites is suspected together the reason of skin irritation. This is certainly true in the situation of scabies infestations the will need medication. In addition, bedding and also clothing the scabies-infected persons have to be wash regularly. Details on the therapy of scabies deserve to be uncovered at

When mites have been identified, ideal control measures deserve to be employed. A vacuum sweeper can be a beneficial weapon in the mite regulate arsenal. Infestations the clover mites, rodent and also bird mites in and around structures deserve to sometimes be removed by vacuuming alone. Vacuuming might be much less effective, however still of value, in managing various food mites, straw itch mites and also dust mites. Note that dust mites space not widespread in ductwork; therefore, duct cleaning is not recommended because that dust mite control. However, a high-efficiency particulate air (HEPA) filter deserve to be installed to assist prevent airborne allergens, including dust mite particles.

Moisture control additionally can be important. Mites deliver air and also water through their human body walls and also are topic to desiccation at short humidity. Dust mite populations, because that example, suffer once a loved one humidity the 50 percent or less is maintained. On the various other hand, high humidity can cause mite populaces to increase exponentially.

Well-ventilated houses in dried climates contain few dust mites. Dwellings with a family member humidity that consistently rises above 50 percent have the right to contain more than 100 dust mites per gram that dust. To alleviate dust mite numbers, a relative humidity of much less than 50 percent have to be kept for number of weeks. Any type of fluctuation in humidity, yet brief, seems enough for dust mites come remain and also reproduce. Daily tasks such as air-conditioning and showering, will cause humidity levels to fluctuate in sections of the home. Thus, other way of managing dust mites should be work in enhancement to humidity control.

For dust mites, commodities containing benzyl benzoate, and possibly abrasive dust formulations, may administer some control when used to flooring and floor coverings. Bedding, draperies, floor coverings and furniture should be cleaned regularly. Pillows, mattresses and also upholstered furniture deserve to be discarded or sealed in plastic consists to aid prevent dust mite infestation, and to reduce ongoing infestations and also their linked allergens. Persons suffering from allergy reactions or asthma have to consult a physician.

Exclusion methods additionally can be provided for certain mites, e.g., clover mites. Structure entry points, e.g., gaps in and also around foundations, doors, windows, vents, utility lines, etc., need to be sealed. This will aid to store clover mites outdoors together with rats, mice, bird -- and also the mites these pests carry when lock are permitted to swarm in structures. If swarms are found, they have to be removed and the area around them vacuumed. Various other non-chemical methods incorporate maintaining a plant-free border approximately foundations and reducing the quantity of fertilizer used to lawns – both that which assist to keep clover mites away from structures.

Pesticides labeled because that use against mites, recognized as miticides or acaricides, can be effective against clover mites and chiggers in grassy areas. For chiggers, however, insect repellents include 7 percent come 30 percent “DEET” need to be used as the first line the defense. Come dislodge any type of chiggers the may have attached, take it a hot, soapy bathtub or shower instantly after visiting natural locations where chiggers are present.

NOTE: when pesticides space used, it is the applicator’s legal duty to read and also follow directions on the product label. Not complying with label directions, even if they conflict with information detailed herein, is a violation of federal law.

For more information, contact:

Illinois room of public Health, division of eco-friendly Health525 W. Jefferson St., Springfield, IL 62761 217-782-5830, 800-547-0466 TTY (hearing-impaired use only)

Illustrations courtesy that Ohio University, Texas A&M University, university of Missouri, and University of Kentucky.

Illinois Departmentof publicly Health535 West Jefferson StreetSpringfield, Illinois 62761Phone 217-782-4977Fax 217-782-3987TTY 800-547-0466Questions or Comments