How Do Bed Bugs Infest
Bed Bugs FAQs
What are bed bugs?
Bed bugs (Cimex lectularius) are small, flat, parasitic insects that feed solely on the blood of people and animals while they sleep. Bed bugs are reddish-brown in color, wingless, range from 1mm to 7mm (roughly the size of Lincoln’s head on a penny), and can live several months without a blood meal.
Where are bed bugs found?
Bed bugs are found across the globe from North and South America, to Africa, Asia and Europe. Although the presence of bed bugs has traditionally been seen as a problem in developing countries, it has recently been spreading rapidly in parts of the United States, Canada, the United Kingdom, and other parts of Europe. Bed bugs have been found in five-star hotels and resorts and their presence is not determined by the cleanliness of the living conditions where they are found.
Bed bug infestations usually occur around or near the areas where people sleep. These areas include apartments, shelters, rooming houses, hotels, cruise ships, buses, trains, and dorm rooms. They hide during the day in places such as seams of mattresses, box springs, bed frames, headboards, dresser tables, inside cracks or crevices, behind wallpaper, or any other clutter or objects around a bed. Bed bugs have been shown to be able to travel over 100 feet in a night but tend to live within 8 feet of where people sleep.
Do bed bugs spread disease?
Bed bugs are not known to spread disease. Bed bugs can be an annoyance because their presence may cause itching and loss of sleep. Sometimes the itching can lead to excessive scratching that can sometimes increase the chance of a secondary skin infection.
What health risks do bed bugs pose?
A bed bug bite affects each person differently. Bite responses can range from an absence of any physical signs of the bite, to a small bite mark, to a serious allergic reaction. Bed bugs are not considered to be dangerous; however, an allergic reaction to several bites may need medical attention.
What are the signs and symptoms of a bed bug infestation?
One of the easiest ways to identify a bed bug infestation is by the tell-tale bite marks on the face, neck, arms, hands, or any other body parts while sleeping. However, these bite marks may take as long as 14 days to develop in some people so it is important to look for other clues when determining if bed bugs have infested an area. These signs include:
- the bed bugs’ exoskeletons after molting,
- bed bugs in the fold of mattresses and sheets,
- rusty–colored blood spots due to their blood-filled fecal material that they excrete on the mattress or nearby furniture, and
- a sweet musty odor.
How do I know if I’ve been bitten by a bed bug?
It is hard to tell if you’ve been bitten by a bed bug unless you find bed bugs or signs of infestation. When bed bugs bite, they inject an anesthetic and an anticoagulant that prevents a person from realizing they are being bitten. Most people do not realize they have been bitten until bite marks appear anywhere from one to several days after the initial bite. The bite marks are similar to that of a mosquito or a flea — a slightly swollen and red area that may itch and be irritating. The bite marks may be random or appear in a straight line. Other symptoms of bed bug bites include insomnia, anxiety, and skin problems that arise from profuse scratching of the bites.
Because bed bug bites affect everyone differently, some people may have no reaction and will not develop bite marks or any other visible signs of being bitten. Other people may be allergic to the bed bugs and can react adversely to the bites. These allergic symptoms can include enlarged bite marks, painful swellings at the bite site, and, on rare occasions, anaphylaxis.
How did I get bed bugs?
Bed bugs are experts at hiding. Their slim flat bodies allow them to fit into the smallest of spaces and stay there for long periods of time, even without a blood meal. Bed bugs are usually transported from place to place as people travel. The bed bugs travel in the seams and folds of luggage, overnight bags, folded clothes, bedding, furniture, and anywhere else where they can hide. Most people do not realize they are transporting stow-away bed bugs as they travel from location to location, infecting areas as they travel.
Who is at risk for getting bed bugs?
Everyone is at risk for getting bed bugs when visiting an infected area. However, anyone who travels frequently and shares living and sleeping quarters where other people have previously slept has a higher risk of being bitten and or spreading a bed bug infestation.
How are bed bugs treated and prevented?
Bed bug bites usually do not pose a serious medical threat. The best way to treat a bite is to avoid scratching the area and apply antiseptic creams or lotions and take an antihistamine. Bed bug infestations are commonly treated by insecticide spraying. If you suspect that you have an infestation, contact your landlord or professional pest control company that is experienced with treating bed bugs. The best way to prevent bed bugs is regular inspection for the signs of an infestation.
This information is not meant to be used for self-diagnosis or as a substitute for consultation with a health care provider. If you have any questions about the parasites described above or think that you may have a parasitic infection, consult a health care provider.
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Bedbugs are small, oval, brownish insects that live on the blood of animals or humans. Adult bedbugs have flat bodies about the size of an apple seed. After feeding, however, their bodies swell and are a reddish color.
Bedbugs do not fly, but they can move quickly over floors, walls, and ceilings. Female bedbugs may lay hundreds of eggs, each of which is about the size of a speck of dust, over a lifetime.
Immature bedbugs, called nymphs, shed their skins five times before reaching maturity and require a meal of blood before each shedding. Under favorable conditions the bugs can develop fully in as little as a month and produce three or more generations per year.
Although they are a nuisance, they are not thought to transmit diseases.
Where Bed Bugs Hide
Bedbugs may enter your home undetected through luggage, clothing, used beds and couches, and other items. Their flattened bodies make it possible for them to fit into tiny spaces, about the width of a credit card. Bedbugs do not have nests like ants or bees, but tend to live in groups in hiding places. Their initial hiding places are typically in mattresses, box springs, bed frames, and headboards where they have easy access to people to bite in the night.
Over time, however, they may scatter through the bedroom, moving into any crevice or protected location. They may also spread to nearby rooms or apartments.
Because bedbugs live solely on blood, having them in your home is not a sign of dirtiness. You are as likely to find them in immaculate homes and hotel rooms as in filthy ones.
When Bedbugs Bite
Bedbugs are active mainly at night and usually bite people while they are sleeping. They feed by piercing the skin and withdrawing blood through an elongated beak. The bugs feed from three to 10 minutes to become engorged and then crawl away unnoticed.
Most bedbug bites are painless at first, but later turn into itchy welts. Unlike flea bites that are mainly around the ankles, bedbug bites are on any area of skin exposed while sleeping. Also, the bites do not have a red spot in the center like flea bites do.
People who don’t realize they have a bedbug infestation may attribute the itching and welts to other causes, such as mosquitoes. To confirm bedbug bites, you must find and identify the bugs themselves.
Signs of Infestation
If you wake up with itchy areas you didn’t have when you went to sleep, you may have bedbugs, particularly if you got a used bed or other used furniture around the time the bites started. Other signs that you have bedbugs include:
- Blood stains on your sheets or pillowcases
- Dark or rusty spots of bedbug excrement on sheets and mattresses, bed clothes, and walls
- Bedbug fecal spots, egg shells, or shed skins in areas where bedbugs hide
- An offensive, musty odor from the bugs’ scent glands
If you suspect an infestation, remove all bedding and check it carefully for signs of the bugs or their excrement. Remove the dust cover over the bottom of the box springs and examine the seams in the wood framing. Peel back the fabric where it is stapled to the wood frame.
Also, check the area around the bed, including inside books, telephones or radios, the edge of the carpet, and even in electrical outlets. Check your closet, because bedbugs can attach to clothing. If you are uncertain about signs of bedbugs, call an exterminator, who will know what to look for.
If you find signs of infestation, begin steps to get rid of the bugs and prevent their return.
Getting rid of bedbugs begins with cleaning up the places where bedbugs live. This should include the following:
- Clean bedding, linens, curtains, and clothing in hot water and dry them on the highest dryer setting. Place stuffed animals, shoes, and other items that can’t be washed in the dryer and run on high for 30 minutes.
- Use a stiff brush to scrub mattress seams to remove bedbugs and their eggs before vacuuming.
- Vacuum your bed and surrounding area frequently. After vacuuming, immediately place the vacuum cleaner bag in a plastic bag and place in garbage can outdoors.
- Encase mattress and box springs with a tightly woven, zippered cover to keep bedbugs from entering or escaping. Bedbugs may live up to a year without feeding, so keep the cover on your mattress for at least a year to make sure all bugs in the mattress are dead.
- Repair cracks in plaster and glue down peeling wallpaper to get rid of places bedbugs can hide.
- Get rid of clutter around the bed.
If your mattress is infested, you may want to get rid of it and get a new one, but take care to rid the rest of your home of bedbugs or they will infest your new mattress.
While cleaning up infested areas will be helpful in controlling bedbugs, getting rid of them usually requires chemical treatments. Because treating your bed and bedroom with insecticides can be harmful, it is important to use products that can be used safely in bedrooms. Do not treat mattresses and bedding unless the label specifically says you can use them on bedding.
Generally it is safest and most effective to hire an experienced pest control professional for bedbug extermination.
University of Kentucky College of Agriculture: "Bed Bugs."
Ohio State University Extension Fact Sheet: "Bed Bugs."
The New York City Department of Heath and Mental Hygiene: "Stop Bed Bugs Safely."
University of Nebraska–Lincoln Extension Lancaster County: "Managing Bed Bugs."
ENTFACT-636: Bed Bugs | Download PDF | En Español
by Michael F. Potter, Extension Entomologist
University of Kentucky College of Agriculture
Until fairly recently, most people (and even pest control professionals) had never seen a bed bug. Bed bug infestations actually used to be very common in the United States before World War II. But with improvements in hygiene, and especially the widespread use of DDT during the 1940s and ‘50s, the bed bugs all but vanished. The pests persisted, however, in some areas of the world including parts of Africa, Asia, and Eastern Europe. Over roughly the past decade, bed bugs have made a dramatic comeback in the U.S.― they’re appearing increasingly in homes, apartments, hotels, health care facilities, dormitories, shelters, schools and public transportation. Other places where bed bugs sometimes occur include movie theaters, laundries, rental furniture, and office buildings. Immigration and international travel have contributed to the resurgence of bed bugs in the U.S. Changes in modern pest control practice, less effective insecticides ― and a decrease in societal vigilance ― are other factors suspected for the recurrence.
Description and Habits
Bed bugs are small, brownish, flattened insects that feed solely on the blood of animals. Although the common bed bug (Cimex lectularius)prefers feeding on humans, it will also bite other warm-blooded animals, including dogs, cats, birds and rodents. It has done so since ancient times; bed bugs are mentioned in medieval European texts and classical Greek writings back to the time of Aristotle.
Adult bed bug feeding on a human.
Adult bed bugs are about 3/16” long and reddish-brown, with oval-shaped, flattened bodies. They are sometimes mistaken for ticks, cockroaches, carpet beetles or other household insects. The immature bed bugs (nymphs) resemble the adults, but are smaller and lighter in color. Bed bugs do not fly, and they don’t jump like fleas do ― but they can crawl rapidly over floors, walls, ceilings and other surfaces. Adult females lay their eggs in secluded places, depositing 1, 2 or more eggs per day, potentially hundreds during their lifetime. The eggs are tiny (about the size of a dust spec), whitish and hard to see without magnification, especially on light-colored surfaces. When first laid, the eggs are sticky, causing them to adhere to surfaces. At room temperatures, bed bug eggs hatch in about a week. Newly emerged nymphs are straw-colored and no bigger than a pinhead.
Adults, nymphs, eggs, shed skins, and fecal spots on a mattress.
As bed bugs grow they molt, shedding their skin five times before reaching maturity. A blood meal is needed between each successive molt. Adult females also must feed in order to lay eggs. Under favorable conditions (70-80°F), the bugs can mature fully in as little as a month, producing multiple generations per year. Cooler temperatures or limited access to blood prolong the development time.
Bed bugs are very resilient. Nymphs and adults can persist months without feeding which is unusual for most insects. The ability to survive without a blood meal is longer at cooler temperatures ― potentially up to a year or longer at 55°F or less. In temperature-controlled buildings, a more typical duration is about 2 to 6 months. Consequently, it is usually impractical to leave buildings unoccupied in hopes of ‘starving out’ an infestation. When infested dwellings such as apartments are vacated, bed bugs often disperse to nearby units, or reduce their activity until the unit is reoccupied.
Bed bugs are active mainly at night. During the daytime, they prefer to hide close to where people sleep. Their flattened bodies enable them to fit into tiny crevices–especially those associated with mattresses, box springs, bed frames and headboards. Bed bugs do not have nests like ants or bees, but do tend to congregate in habitual hiding places. Characteristically, these areas are marked by dark spotting and staining, which is the dried excrement of the bugs. Also present will be hatched and un-hatched eggs, the tannish shed skins of maturing nymphs, and the bugs themselves. Another possible sign are rusty or reddish smears on bed sheets or mattresses from crushed engorged bed bugs. Although it’s often stated that bed bugs have a telltale “buggy” odor, the smell is seldom evident except in extreme infestations and should not be relied upon for detection.
Dark spots on mattress and box spring are a telltale sign of bed bugs
Bed bugs prefer to hide close to where they feed, but if necessary will crawl several feet to obtain a meal. Initially the bugs tend to be situated around sleeping areas, i.e., beds, couches and recliners. If infestations are allowed to persist, they also may disperse to other locations within the dwelling making elimination more difficult.
Bites and Health Concerns
Bed bugs usually bite people at night while they are sleeping. Hungry bed bugs may also feed during the daytime, especially if this is when the occupant normally sleeps. They feed by piercing the skin with an elongated beak through which they withdraw blood. Engorgement of the bed bug takes roughly three to 10 minutes, but because the bite is painless, the person seldom realizes they are being bitten. Bed bugs normally do not reside on people like head or body lice do; instead, immediately after feeding, bed bugs crawl to a secluded location to digest their meal. Symptoms after being bitten by bed bugs vary from person to person. Many develop an itchy red welt within a day or so of the bite. Others have little or no reaction. Sometimes the reaction is delayed days or even weeks after the actual bite occurs, which can make it difficult to determine where or when bites actually occurred. Studies conducted in bed bug-infested apartments suggest about 30 percent of people do not react even when bitten repeatedly over time, and there is still higher incidence of non-reactivity among the elderly. Unlike flea bites, which occur mainly around the lower legs and ankles, bed bugs feed on any skin exposed while sleeping (face, neck, shoulders, back, arms, legs, etc.). The welts and itching are often wrongly attributed to other causes, such as mosquitoes. For these reasons, infestations may go a long time unnoticed, and can become quite large before being detected.
The likelihood of bed bugs increases if the affected individual has been traveling, or if they have acquired used beds or furnishings before symptoms started to appear. Bed bugs also are suspect if you wake up with itchy welts you did not have when you went to sleep. It’s important to recognize, however, that not all bite-like reactions are due to bed bugs. Confirmation requires finding and identifying the bed bugs, shed skins, fecal spots, etc., which often requires the help of a professional. (Other possible sources of irritation that may be mistaken for bed bugs are discussed in University of Kentucky entomology fact sheet ENT-58,Invisible Itches: Insect and Non-Insect Causes).
A common concern with bed bugs is whether or not they transmit diseases. Although bed bugs can harbor various pathogens, transmission to humans has not been proven and is considered unlikely. Their medical significance is most commonly attributed to itching and inflammation from their bites. Antihistamines and corticosteroids may be prescribed to reduce allergic reactions, and antiseptic or antibiotic ointments to prevent infection. Though not known to carry diseases, bed bugs can substantially reduce quality of life by causing discomfort, sleeplessness, anxiety, and embarrassment. According to some health experts, the added stress from living with bed bugs can have a significant impact on the emotional health and well-being of certain individuals.
Conventional insect repellents, like those used to deter ticks and mosquitoes, do not appear to be as effective against bed bugs. Therefore, attempting to avoid being bitten by applying insect repellent at bedtime is not recommended. Sleeping with the lights on is also not likely to deter hungry bed bugs, as they will adjust their feeding cycle to the host’s sleeping patterns.
How Infestations Originate
It often seems that bed bugs arise from nowhere. The bugs are efficient hitchhikers and are usually transported into dwellings on luggage, clothing, beds, furniture, and other items. This is a particular risk for hotels and apartments, where turnover of occupants is constant. Bed bugs are small and agile, escaping detection after crawling into suitcases, backpacks and belongings. Acquiring secondhand beds, couches and furniture is another way that the bugs are transported into buildings. Bed bugs also can be carried in on one’s clothing, shoes or wheelchair. Once bed bugs are introduced, they can crawl from room to room or floor to floor. They can also be transported throughout buildings on people and their belongings.
Unlike cockroaches and flies that feed on filth, there is often no relationship between bed bugs and cleanliness. Since the bugs feed solely on blood, pristine dwellings can be as vulnerable to infestation as are places of squalor. That said, poverty and privation can lead to increased risk of bed bug problems, as can the inability to hire a professional exterminator.
Some bed bug species are parasites of bats or birds, and may bite people if the wild hosts are no longer available. Although similar in overall appearance, the species of bed bugs that normally feed on bats, swallows, chimney swifts, pigeons or other wild hosts can be differentiated from those that prefer humans. Entomologists and knowledgeable pest managers can make this determination. If bat bugs or bird bugs are present, roosting and nesting sites should be the primary focus, and the animals should be removed and excluded from the building.
Bed bugs are challenging to eradicate. Since they can hide in so many places, inspections must be thorough and elimination is not always a certainty. Whenever resources allow, it’s prudent to enlist the services of a professional. Experienced pest controllers know where to look for bed bugs, and have an assortment of tools at their disposal. Nonetheless, owners and occupants can assist the professional in several important ways. Affording access to all living areas is crucial, and excess clutter will need to be removed. Belongings strewn about rooms offer many places for the bugs to hide, and impede inspection and treatment. Since bed bugs can disperse throughout a building, it often will be necessary to inspect adjoining rooms and apartments as well.
Where They Hide
Bed bugs can live in almost any crevice or protected location. The most common place to find them is the bed or where people sleep. This is especially true during the early stages of a problem. As infestations grow larger, the bugs tend to move beyond beds into other locations making control more difficult.
Bed bugs most often congregate along seams and edges of
mattresses and box springs. Blackish spots are excrement.
Bed bugs often hide in seams, folds and crevices of mattresses, box springs, bed frames and headboards. A thorough inspection requires dismantling the bed so that upper and lower seams and surfaces can be examined. Things to look for are the bugs themselves, shed skins of the nymphs (immature bed bugs), and the blackish fecal spots. The dark spots of dried bed bug excrement are often present along mattress seams or wherever the bugs have resided. Box springs afford many places for bed bugs to hide, especially along the upper seams and underneath, where the bottom edge of the box rests on the frame. If an underlying dust cover is present, it may have to be removed to gain access for inspection and possible treatment. Successful treatment of mattresses and box springs can be difficult, however, and infested ones may need to be discarded or encased in a protective cover.
Cracks and crevices of bed frames should also be examined, especially if the frame is wood. (Bed bugs have an affinity for wood and fabric more so than metal or plastic.) Wooden support slats, if present, should be removed and examined since bed bugs often congregate where the ends rest on the frame. Screw holes, knots and other recesses are also common hiding places. Headboards secured to walls should be removed and inspected. In hotels, the area behind the headboard is often the first place that bed bugs become established. Bed bugs also frequently hide within items stored under beds.
Upholstered chairs, recliners and sofas are typically the next most likely area for bed bugs, and should be examined carefully along seams, skirts and folds of fabric. Sofas and recliners can be major bed bug hotspots, especially when used for sleeping. Like beds, they can be difficult to treat and sometimes may need to be discarded.
Bed bugs also congregate along seams of sofas and recliners. Photo at right shows
bugs hiding near a recessed screw under a night stand (note the presence of fecal spots).
Nightstands and dressers may need to be emptied and examined inside and out, and tipped over to inspect the woodwork underneath. Oftentimes the bugs will be hiding in cracks, corners, and recesses. Other common bed bug hiding places include: along and under the edge of wall-to-wall carpeting, especially behind beds and sofas; cracks in wood molding; ceiling-wall junctures; behind wall-mounted pictures, mirrors, outlets and switch plates; under loose wallpaper; clothing and clutter within closets; and inside clocks, phones, televisions and smoke detectors.
Bed bugs often reside along baseboards. Photo at right shows eggs,
nymphs, adults and fecal spots near a carpet edge.
Bed bugs tend to congregate, but it’s also common to find a single bug or some eggs here and there. A thorough inspection and treatment may take up to several hours. Some companies use specially trained dogs to assist in finding small dispersed infestations, especially in such places as hotels, schools, libraries and office buildings. When properly trained, bed bug detection dogs can be quite effective. Relatively few companies are routinely using them, however, due to the expense of training and maintaining such animals. Reliability of some of the dogs is also being questioned as more enter the market.
Preparing for Treatment
Preparing for bed bug treatment is tedious yet important. Very comprehensive preparation is necessary when infestations are heavy and the bugs are widely dispersed. More limited prep may be adequate for light infestations since at these levels the bed bugs typically are more confined to sleeping areas (beds, sofas, and recliners). Pest control firms have their own policies, however, regarding preparation requirements which may also depend on the manner of treatment.
Some firms want beds stripped and furniture moved before they arrive, while other firms prefer to inspect first and perform these tasks themselves. Clutter and belongings on floors (especially beneath beds) must be removed since they impede treatment and afford additional places for bugs to hide. Bedding and garments normally will need to be laundered and/or hot dried (120°F minimum) since they cannot be treated with insecticides. An effective and efficient alternative to laundering is to simply place bedding, clothing, toys, shoes, backpacks, etc., in a clothes dryer set at medium-to-high heat for 10 to 20 minutes. This can be done in lieu of washing and will kill all bed bug life stages.
According to textile experts (Drycleaning & Laundry Institute, Laurel, MD), most garments designated as ‘dry-clean only’ (e.g., cotton, wool, silk, linen, rayon, nylon) will not be harmed provided they are dry before being placed in a clothes dryer at a moderate temperature setting. Dry cleaning procedures also kill bed bugs, but there is a risk of infesting the establishment when buggy items are tagged and sorted.
Items that cannot be placed in a washer or dryer can sometimes be de-infested by wrapping them in plastic and placing them outdoors in a hot, sunny location for at least a day (for example, on pavement or in a closed vehicle parked in the sun). Packing items loosely in garbage bags and elevating objects off the ground helps the heat permeate further, and will make it harder for bugs to find a cool place to hide. Monitoring with a thermometer is prudent to ensure that a temperature of at least 120°F is achieved wherever the bugs may be.
Bed bugs will also succumb to cold temperatures below 32°F, but the freezing temperatures must be maintained for a longer period (e.g., one to two weeks). Consequently, heating tends to be a better option throughout much of the country. Efforts to rid entire dwellings of bed bugs by raising or lowering the thermostat will be unsuccessful, although pest control firms are able to achieve lethal temperatures with supplemental heaters (see the subsequent section entitled"Heat Treatments"for more details).
Discarding or Encasement
Although most furnishings need not be discarded, in some cases this may be necessary. This is especially true of heavily infested beds, sofas and recliners where bugs and eggs often reside in hard-to-reach places. Consequently, pest control firms may recommend such items be discarded, especially when in poor condition. When infested items are discarded, bagging or wrapping them prevents dislodgement of bugs en route to the trash.
In the case of beds, a more economical option is to encase both the mattress and box spring in a protective cover like those used for allergy relief. Encasements specifically designed to help protect against bed bugs are available through retail or pest control firms. Higher quality ones tend to be more durable and comfortable to sleep on. Once the encasement is installed and zipped shut, any bugs which happen to be inside are entombed and eventually will die. Encasements also help protect newly purchased beds, and make it easier to spot and destroy any bugs residing on the outer surface during subsequent examination. Encasements will not, however, keep bed bugs from crawling onto a bed and biting a sleeping person.
Encasements are an economical alternative to discarding infested beds.
Vacuuming, Steaming, Freezing
General housecleaning measures, (e.g. vacuuming floors and surfaces), seldom reach where bed bugs hide. For this reason, repetitive vacuuming by occupants may not be worth the effort, especially compared to other important preparatory activities. Targeted vacuuming of bed bugs and infested harborages, however, can help remove some of the bugs before other treatment measures are undertaken. Bed bugs and especially the eggs can be difficult to dislodge. Optimum results will be achieved by moving and scraping the end of the suction wand along infested areas such as seams and fabric folds of beds and sofas, and the perimeter edge of wall-to-wall carpet. Bed bugs can survive the high speed trip down a vacuum, so it’s important to carefully dispose of the vacuum contents in a sealed trash bag afterwards.
One trick to make this disposal easier involves using the cut-off end of a nylon stocking (or a knee-high nylon stocking) and a rubber band. Insert the stocking (toe first) into the end of the vacuum suction wand/tube, leaving the opening of the stocking protruding out of the end of the suction wand. Then fold the stocking opening back over the end of the wand and use the rubber band to secure it there. When the vacuum is turned on and the bed bugs are sucked into the tube, they will be trapped in the stocking. Afterwards, carefully remove the rubber band and retrieve the bug-filled stocking. Then secure the end of the stocking with the rubber band and dispose of it.
Some pest control firms also employ commercial steamers or spot-freezing equipment to treat areas where bed bugs are found or suspected. Used correctly, they kill bugs and eggs on contact. Neither method, however, affords residual protection against bed bugs which may have been missed. Steaming and spot-freezing equipment also have limited ability to penetrate fabric, wood, and other materials where bed bugs often reside.
Steaming (left) and spot-freezing (right) kill bugs and eggs on contact but afford no lasting protection
Some pest control firms utilize specialized heating equipment to de-infest furnishings, rooms, and entire dwellings. The procedure involves heating up the infested item or area to temperatures lethal to bed bugs. Portable heaters and fans are used to gradually heat the air to about 120 – 130°F while monitoring with strategically placed sensors. By carefully controlling the temperature, bugs and eggs are killed wherever they may be without damaging household items.
Some preparation is still required (e.g. removal of heat-sensitive items such as aerosol cans, indoor plants and medications), but it is seldom necessary to bag, launder and/or hot dry bedding and clothing since these items will be heated along with other furnishings. Another advantage of heat treatment is that infestations can often be eliminated in one day, rather than over multiple days or weeks. Conversely, heat treatment alone has no lasting (residual) effect should bed bugs be reintroduced into the dwelling. Consequently, some companies recommend concurrently applying residual insecticides. To further minimize reintroduction, occupants are advised to take as few belongings as possible with them while the heat treatment is in progress.
Heat treatments are an effective way to eliminate bed bugs quickly, but
tend to be more costly than conventional treatment methods.
Heat treatments require specialized training and equipment, and may be more costly than conventional approaches relying principally on insecticides.
While the former methods are helpful, insecticides are widely used by most pest control companies. A variety of EPA-registered materials are available formulated as liquids, dusts and aerosols. Baits used to control ants and cockroaches are ineffective in this case since bed bugs must bite and feed on blood. Professional-use insecticides such as Temprid®, Transport® and Phantom® tend to be more effective than bed bug sprays sold by retailers. Bleach, alcohol, cigarette lighters, etc. should NOT be used to control bed bugs. Besides being ineffective, such actions can result in fires and other dangerous outcomes.
Application entails treating all areas where the bugs are found or tend to hide or crawl. This takes considerable effort and follow-ups are usually needed. Companies typically treat seams, folds and crevices of bed components, chairs and sofas, but usually will not spray the entire sleeping surface or seating area. They also do not spray bed sheets, blankets or clothing, which instead should be hot washed or heated in a dryer.
Fumigation using a penetrating gas is another way to de-infest dwellings or furnishings, but the procedure is only offered by certain companies. True fumigation is not the same as setting off a total release fogger or ‘bug bomb.’ (It should be noted that bug bombs are considered ineffective in the treatment of bed bugs, and can be quite dangerous if misused.) The fumigation process is technically complex and requires vacating the building for a period of days. The building is then sealed and injected with a lethal gas, usually sulfuryl fluoride. Because the entire building must be vacated, structural fumigation is logistically more challenging with multi-unit buildings such as apartments, than for single family homes. Bed bug fumigations tend to be more common in southern and western states, where the procedure is also used to control certain types of wood-dwelling termites.
Considering how time-consuming and costly it can be to eradicate bed bugs, it’s prudent to take precautions and avoid infestations in the first place. Householders should be vigilant when acquiring used furnishings, especially beds and couches. Discarded items should be avoided, and secondhand articles should be examined closely before being brought into the home. Look carefully in the folds and seams of furniture for signs of bed bugs (see the previous section entitled "Description and Habits" for more details). There is no reason to stop shopping in consignment stores, yard sales, etc., but it would be prudent to run clothing and fabric items through the washer or dryer before storing them in the home. The risk of acquiring bed bugs from items purchased in antique stores would generally be insignificant.
Discarded beds and couches might be infested and should be left alone. Devices
such as the ClimbUp® can be placed under beds and sofas to help monitor for
bed bugs. Bugs that crawl into the plastic dishes cannot escape.
Avoiding bed bugs is most challenging in hotels, apartment buildings, and other places where there are many people, high turnover and ongoing opportunities for introduction of the pests.Periodic, preventive inspection by tenants, housekeeping/maintenance staff, or pest control firms is the best way to detect infestations in their initial stages when they are easiest to control.Visual inspections can be supplemented by using various monitoring devices to capture and reveal bed bugs that may have been overlooked by occupants.
Additional Tips for At-Risk Groups
Business and Leisure Travelers
Checking beds for bed bugs was a common practice long ago, especially while traveling. Travelers today should consider doing the same, preferably before unpacking. This would entail examining the bed sheets and seams of the mattress and perhaps box spring for signs of bed bugs, especially along the head (pillow end) of the bed. Experts also remove and check behind headboards since this is a frequent hiding place for bed bugs in hotels. Headboards are heavy and cumbersome, however, and untrained persons should not attempt removal themselves.
To help guard against bed bugs while traveling, take a moment to inspect
beds. A small flashlight is useful for dimly-lit areas.
Vigilant travelers may also want to elevate suitcases off the floor on a stand, tabletop or other hard surface rather than storing them on the floor or another bed. Hyper-vigilant travelers may further opt to keep belongings in sealed plastic pouches and their suitcase in a zippered tote — however each traveler must decide how cautious they wish to be.
While encountering bed bugs in hotels is possible, typically only a small number of rooms have problems. If bed bugs are discovered, guests can request another room, preferably in another area of the building, since problems often extend to nearby units. Should you experience itchy welts suggestive of bed bug bites during your stay, it would be prudent upon returning home to place all clothing directly into the washer and/or dryer. Inspecting or vacuuming luggage upon arrival home is less useful since it’s hard to spot bed bugs inside a suitcase. The suitcase itself can either be treated or discarded.
Social Service and Emergency Workers
Caregivers, firefighters, and other service providers are sometimes required to enter and work in bed bug-infested dwellings. In doing so, there is the potential to transport some bugs home or to the workplace. It should be noted that bed bugs do not fly, nor jump onto people/pets as fleas do. During the day, bed bugs usually remain hidden and immobile, becoming more active at night when seeking a host. Consequently, the chance of picking up bed bugs by merely walking into an infested dwelling during the day is unlikely. The risk may increase while providing care but can be lessened by taking some precautions.
Bring in only what is needed, and avoid sitting or placing coats and other items on beds, floors and sofas where the bugs commonly reside. Essential items can be placed on a tabletop or other hard surface, preferably away from bedrooms and sleeping areas. Better to sit on a hard (non-upholstered) chair than on sofas and recliners. Also try to avoid leaning or brushing against beds and upholstered furniture. If such items are carried out of infested dwellings (e.g., by sanitation workers or firefighters), it’s best to wrap them in plastic or at least not hold them against your body during transport. Emergency Medical (EMS) personnel may need to take additional precautions, such as removing a patient’s bed bug-infested shoes or clothing, or installing plastic sheeting before transporting them in the emergency vehicle.
As mentioned earlier, applying insect repellent at bedtime will probably not deter bed bugs from biting. When working in severely infested dwellings, there may be some benefit to spraying tops and bottoms of shoes with DEET-based repellents. Those working in bed bug-infested environments may also want to hot wash or run clothing, etc. through a dryer upon returning home or to the office.
Schools and Daycares
Bed bugs are a growing problem in schools and daycares. Typically they are introduced by students or staff living with an infestation at home. Pinpointing where the bugs exist can be challenging in such environments since there are no beds or sleeping areas for the insects to congregate. (Similar challenges occur when bed bugs are found in offices, libraries and retail stores.) Usually only small numbers of bed bugs are spotted, often on a student’s clothing, backpack, chair or desk. While this does not necessarily confirm that the child’s residence also has bed bugs, the parents should be notified that the home should be inspected, preferably by a professional. Teachers, nurses, and staff should be educated about the bugs and what they look like. Bed bugs should also be considered if a student frequently has reddened itchy welts –but keep in mind such reactions can be for reasons other than bed bugs.
Bed bug incidents in schools are best handled by knowledgeable pest control firms. Widespread insecticide treatment of classrooms, hallways, buses, etc. is unnecessary, ineffective and imprudent. Effort instead should be spent checking chairs, desks, lockers, coat rooms, etc. in the vicinity of where the bugs were found, and treatment should be focused on those specific areas. Canine inspections can also be useful in finding small numbers of bed bugs in schools and other establishments where there are no beds.
Those Who Cannot Afford a Professional
Bed bug eradication is challenging and it’s prudent to hire a professional when resources allow. However treatment can be expensive, often costing hundreds or thousands of dollars. Those who cannot afford this often must cope with the problem themselves. A useful step that anyone can take to combat bed bugs is to install bed encasements. Covering the mattress and box spring can help eliminate a substantial portion of the bed bug population — especially if discovered early while most of the bugs are still confined to the bed area. Extra care should be taken when installing budget encasements since these can tear easily, especially on metal bed frames. Ideally both the mattress and box spring should be encased. If only one encasement is possible it’s often best to cover the box spring which is harder to subsequently inspect.
A torn encasement may no longer be effective.
With practice and a flashlight, nonprofessionals can become proficient in finding and destroying bed bugs. The process is made easier by reducing clutter, especially in bedrooms and sleeping areas. Bugs that are spotted can be removed with a vacuum (see previous discussion), or killed with over-the-counter insecticides labeled for such use. Most bed bug sprays intended for householders have little remaining effect after the spray has dried. Therefore it’s important to initially contact as many of the insects as possible with the spray droplets. Insecticide labels should be read carefully as some bed bug products should not be used on mattresses and seating areas. Some insecticides applied as powders or dusts (e.g., diatomaceous earth) will kill bed bugs although boric acid powder will not. However powders can be messy and difficult to apply, especially by nonprofessionals. Total release foggers (otherwise known as ‘bug bombs’) are ineffective against bed bugs and potentially dangerous when used incorrectly (see University of Kentucky entomology fact sheet Limitations of Home Insect Foggers).
Insecticide dusts should never be applied this heavy. A light deposit is all
that’s needed and is best accomplished with a professionally-designed duster.
Monitoring devices such as the previously mentioned ClimbUp® are useful for confirming the presence of bed bugs when a visual inspection cannot. When installed under bed legs, they also provide a barrier between floor and bed which can potentially reduce bites, especially when beds are pulled slightly away walls and encased.
The incidence of bed bugs in the United States and in many countries of the world has increased to the point where vigilance is a prudent practice. Some common sense tactics and taking modest precautions can go a long way towards helping avoid infestation.
Portuguese Translation:Prepared by Artur Weber & Adelina Domingos
CAUTION!Pesticide recommendations in this publication are registered for use in Kentucky, USA ONLY! The use of some products may not be legal in your state or country. Please check with your local county agent or regulatory official before using any pesticide mentioned in this publication.
Of course,ALWAYS READ AND FOLLOW LABEL DIRECTIONS FOR SAFE USE OF ANY PESTICIDE!
Bed Bug Infestation
Bed bugs are flat and small in size, allowing them to hide easily from view during the day when they are not active. They hide in mattresses, bed frames, bedding, furniture, carpets, baseboards and bedroom clutter. They are most commonly found in the seams of mattresses or inside box springs. However, it is not necessary to locate a specimen to identify an infestation. Their excrement leaves brown to black stains on mattresses and linens, and bloodstains may be visible where bed bugs have been accidentally crushed.
Bed bugs are commonly transported within luggage, allowing them to spread anywhere humans settle. Infestations have become a problem in domestic households, hotels, dormitories and other places of residence. Because of their small size and propensity to hide within mattresses and furniture, controlling a bed bug infestation can prove difficult.
The presence of only one fertile female bed bug in a friendly environment such as a single or multiple family dwelling is an infestation that is waiting to happen. Since a healthy, blood-fed female bed bug can produce from 200-500 healthy eggs during her lifetime and may lay from 2-5 eggs each day, the likelihood of an infestation of bed bugs is extremely high unless bed bug control efforts by your pest management professional are employed to eliminate the infestation.
Mattress Infested With Bed Bugs
Bed Bug Control
Cimex lectularius L.
Learn what Bed Bugs look like, and how to detect if you have a Bed Bug Infestation.
Find out how Bed Bugs infiltrate your home and where they are attracted to.
Learn about Bed Bug bites. their feces and how they can impact your health.
Learn how Orkin handles Bed Bugs, homeopathic cures and the cost of Bed Bug extermination services.
How Long Does It Take For A Bed Bug Infestation To Develop?
ByChris Williamson February 6, 2012.
I was recently sent to a job to inspect for Bed Bugs. Previous tenants had been treated for bed bugs and have moved out. Management wanted to know two things: How long has the unit been infested, and were there any live beg bugs. Inspection for bed bugs can be difficult as most units are full of furniture and belongings, this unit was vacant and empty. With full access to all areas of the unit the extent of the infestation was more clearly defined.
Bed bugs, the scourge of the rental industry, are small insects that feed exclusively on human blood. Long lived and easily spread, bed bugs secretive lifestyle makes detection difficult. Relatively few bed bugs start an infestation. In fact, if a male bed bug is the only hitchhiker, no infestation will develop. Only female bed bugs are able to lay eggs. A mated female can lay around 3 eggs a day if feeding is available, laying more than 300 eggs in her lifetime. Small white eggs are cemented to discrete surfaces, near a host, and hatch in about 10 days. Nymphs resemble adults but are much smaller. In order to grow, or molt, nymphs must acquire a blood meal. Depending on the temperature, it takes nymphs about 100 days for the five molts to occur before mating can take place. Roughly 1.5-2 months are required for a complete cycle from egg to mated adult bed bug. Adult bed bugs live about 10 months, although without a host, bed bugs may live over a year.
Bed bug infestations develop slowly. At first very few insects are present, feeding intermittently on the host and may not be noticed. Bites are sometimes overlooked or blamed on some other pest species like spiders. Secretive adults may not be noticed as they feed on sleeping hosts. Over time though, evidence builds up. Bed bugs are gregarious, and can be found living side by side in harborage sites. Great numbers of nymphs and adults can be found together. As these sites become more active, females will migrate to areas of less activity to lay eggs. Male bed bugs want to mate constantly with females, driving them away. This behavior is believed to be what makes bed bugs “spread out” into new areas. Large populations also use up more and more of the hiding spaces near the host, and are forced to seek shelter farther from the feeding site. All the while the bed bugs are pooping. Bed bug feces is little more that partially digested human blood. Fecal spots form as the bed bugs move about and accumulate in and around the harborage sites. Fecal spots are usually clustered, and may have a small “smear” at one side, indicating the direction of the bed bug’s travel. In heavy infestations there may even be a discernable, almost sweet odor, due to large amounts of feces and aggregation secretions. As bed bugs molt during the growth process, the smaller old skin is shed and a new larger skin forms. These skins are also left where they fall and may accumulate over time. In heavy infestations, there may be considerable numbers of these cast skins.
Now, back in the unit to be inspected, I am looking for evidence. I begin with a cursory look around. With a bright flashlight, pliers, and a screwdriver in hand I start with the ceiling edges and walls. As harborage sites become full, bed bugs will end up in corners and on walls. Right away I begin to notice some fecal spots on door frames and at lower closet edges. No activity behind outlet covers, or under carpet in the 2 bedrooms, 12-25 dead bed bugs noted on the bed room floors, some fecal spots on lower closet door and door frames, no live activity. Bases of all 3 hall closet door frames also had fecal spots, dead bed bugs, no live activity. As I began to examine the living room, there seemed to be more and more dead bed bugs, and fecal spotting, increasing as I got over to the baseboard radiator. Fecal spotting all over the metal housing and adjacent molding told me I was getting warm. When I dismantled the housing and pulled the carpet out from under it I hit pay dirt. 1000’s of cast skins, large pockets of blood stained carpet(major harborage site), and hundreds of dead bed bugs were deposited under the carpet and heating unit. There must have been a couch or bed right there. As the infestation grew, the bed bugs spread out along the floor edge and eventually found the bed rooms, where there was much less fecal spotting etc. In my opinion, the focal point of the infestation was the living room. As far as a time table is concerned, based on the life cycle, amount of fecal spotting, and the number of cast skins noted, the infestation was more than a year old, maybe older. 2 live bed bugs were found, although upside down, on the kitchen floor. This indicates that the treatment was working, and that bed bug control is almost complete. My recommendation was to re-treat the unit prior to new tenants moving in to ensure that the infestation is gone completely. If you suspect bed bug activity in your home, contact Colonial Pest for a free quote, or call us right now at 1-800-525-8084!