Bedbug 952459 226179059 2008-07-17T04:57:28Z 216.240.30.23 /* Feeding habits */ {{Original research|date=September 2007}} {{Taxobox <!-- The following is markup for the taxonomy table. Scroll down to see the main text --> | name = Bedbug | image = Cimex lectularius.jpg | image_width = 250px | image_caption = ''Cimex lectularius'' | regnum = [[Animal]]ia | phylum = [[Arthropod]]a | classis = [[Insect]]a | ordo = [[Hemiptera]] | subordo = [[Heteroptera]] | familia = '''Cimicidae''' | familia_authority = [[George Willis Kirkaldy|Kirkaldy]], 1909 | subdivision_ranks = [[Genus|Genera]] & [[Species]] | subdivision = '''Genus ''[[Cimex]]''''' * ''Cimex lectularius'' * ''Cimex hemipterus'' (''C. rotundatus'') * ''[[Cimex pilosellus]]'' * ''Cimex pipistrella'' '''Genus ''Leptocimex''''' * ''Leptocimex boueti'' '''Genus ''Haematosiphon''''' * ''Haematosiphon inodora'' '''Genus ''Oeciacus''''' * ''Oeciacus hirudinis'' * ''Oeciacus vicarius'' '''Genus ''Afrocimex''''' *''Afrocimex constrictus'' }} A '''bedbug''' (or '''bed bug''') is a small [[Nocturnal animal|nocturnal]] [[insect]] of the family '''Cimicidae''' that lives by [[hematophagy]], or by feeding on the [[blood]] of [[human]]s and other [[homeothermic|warm-blooded]] [[Host (biology)|host]]s. ==Biology== The '''common bedbug''' (''Cimex lectularius'') is the best adapted to human environments. It is found in [[temperate]] climates throughout the world and lives off the blood of humans. Other species include ''Cimex hemipterus'', found in [[tropics|tropical regions]] (as well as Florida), which also infests [[poultry]] and [[bats]], and ''Leptocimex boueti'', found in the tropics of [[West Africa]] and [[South America]], which infests bats and humans. ''[[Cimex pilosellus]]'' and ''Cimex pipistrella'' primarily infest [[bat]]s, while ''Haematosiphon inodora'', a species of [[North America]], primarily infests poultry.<ref>Cranshaw. W.S. F.B. Peairs. "Bat Bugs and Bed Bugs." http://www.ext.colostate.edu/PUBS/INSECT/05574.html.2005.</ref> ''Oeciacus'', while not strictly a bedbug, is a closely related genus primarily affecting [[bird]]s. Adult bedbugs are a reddish brown, flattened, oval, and wingless, with microscopic hairs that give them a banded appearance. A common misconception is that they are not visible to the naked eye. Adults grow to 4 to 5 mm (one-eighth to three-sixteenths of an inch) in length and do not move quickly enough to escape the notice of an attentive observer. Newly hatched [[Nymph (biology)|nymphs]] are translucent, lighter in color and continue to become browner and [[ecdysis|moult]] as they reach [[maturity]]. When it comes to size, they are often compared to [[lentil]]s or appleseeds. A recent paper by Professor [[Brian J. Ford]] and Dr Debbie Stokes gives views of a bedbug [http://www.rms.org.uk/downloads/1_-_Ford-Stokes.pdf under various microscopes]. [[Image:bedbug1.JPG|280px|thumb|left|Bedbug 4 mm length 2.5 mm width (Shown in a film roll plastic container. On the right is the sloughed off skin, which this bedbug just recently wore during its nymph form)]] ===Feeding habits=== Bedbugs are generally active only at dawn, with a peak attack period about an hour before sunrise. They may attempt to feed at other times, however, given the opportunity, and have been observed to feed at any time of the day. Attracted by warmth and the presence of [[carbon dioxide]], the bug pierces the skin of its host with two hollow tubes. With one tube it injects its saliva, which contains [[anticoagulant]]s and [[anesthetic]]s, while with the other it withdraws the [[blood]] of its host. After feeding for about five minutes, the bug returns to its hiding place. The bites cannot usually be felt until some minutes or hours later, as a dermatological reaction to the injected agents, and the first indication of a bite usually comes from the desire to scratch the bite site. Although bedbugs can live for a year or as much as 18 months without feeding, they typically seek blood every five to ten days. Bedbugs that go dormant for lack of food often live longer than a year, well-fed specimens typically live six to nine months. Low infestations may be difficult to detect, and it is not unusual for the victim not to even realize they have bedbugs early on. Patterns of bites in a row or a cluster are typical as they may be disturbed while feeding. Bites may be found in a variety of places on the body. Bedbugs may be erroneously associated with filth in the mistaken notion that this attracts them. Bedbugs are attracted by exhaled carbon dioxide and body heat, not by dirt, and they feed on blood, not waste. In short, the cleanliness of their environments has effect on the control of bedbugs but, unlike [[cockroach]]es, does not have a direct effect on bedbugs as they feed on their hosts and not on waste. Good housekeeping in association with proper preparation and mechanical removal by vacuuming will certainly assist in control. ===Reproduction=== <!-- Deleted image removed: [[Image:bedbugs.jpg|300px|thumb|right|The Life Cycle of Bedbugs]] --> All bedbugs [[mate]] via a process termed [[traumatic insemination]].<ref name="carayon1959">Carayon, J. 1959 Insémination par “spermalège” et cordon conducteur de spermatozoids chez Stricticimex brevispinosus Usinger (Heteroptera, Cimicidae). Rev. Zool. Bot. Afr. 60, 81-104.</ref><ref name="carayon1966">Carayon, J. 1966 Traumatic insemination and the paragenital system. In Monograph of the Cimicidae (Hemiptera – Heteroptera) (ed. R. L. Usinger), pp. 81-166. College Park, MD: Entomological Society of America.</ref><ref name="carayon1977">Carayon, J. 1977 Insémination extragénitale traumatique. In Traité de Zoologie 8(V-A) (ed. P. P. Grassé), pp. 351-390. Paris: Masson.</ref> Instead of inserting their genitalia into the female's reproductive tract as is typical in copulation, males instead pierce females with hypodermic genitalia and [[Ejaculation|ejaculate]] into the body cavity. This form of mating is thought to have evolved as a way for males to overcome female mating resistance.<ref name="arnqvist-rowe">Arnqvist, G. & Rowe, L. 2005 Sexual Conflict. Princeton NJ: Princeton Univ. Press.</ref><ref name="stutt">Stutt, A. D. & Siva-Jothy, M. T. 2001 Traumatic insemination and sexual conflict in the bed bug Cimex lectularius. Proc. Nat. Acad. Sci. 98, 5683-5687.</ref> Traumatic insemination imposes a cost on females in terms of physical damage and increased risk of infection.<ref name="arnqvist-morrow">Morrow, E. H. & Arnqvist, G. 2003 Costly traumatic insemination and a female counter-adaptation in bed bugs. Proc. R. Soc. Lond. B 270, 2377-2381.</ref><ref name="reinhardt">Reinhardt, K., Naylor R. & Siva-Jothy, M. T. 2003 Reducing a cost of traumatic insemination: female bedbugs evolve a unique organ. Proc. R. Soc. Lond. B 270, 2371-2375.</ref> To reduce these costs females have evolved internal and external "paragenital" structures<ref name="arnqvist-morrow"/><ref name="reinhardt"/> collectively known as the “spermalege”.<ref name="carayon1959"/><ref name="carayon1966"/><ref name="carayon1977"/> Within the True Bugs (Heteroptera) traumatic insemination occurs in the Prostemmatinae (Nabidae) and the Cimicoidea (Anthocoridae, Plokiophilidae, Lyctocoridae, Polyctenidae and Cimicidae), and has recently been discovered in the plant bug genus ''Coridromius'' (Miridae).<ref name="tatarnic">Tatarnic, N.J., Cassis, G. $ Hochuli, D.F. 2006 Traumatic insemination in the plant bug genus ''Coridromius'' Signoret (Heteroptera: Miridae). [[Biology Letters]] 2, 58-61.</ref> Remarkably, in the genus ''Afrocimex'' both males and females possess functional external paragenitalia, and males have been found with copulatory scars and the ejaculate of other males in their haemolymph. There is a widespread misbelief that males inseminated by other males will in turn pass the sperm of both themselves and their assailants onto females with whom they mate.<ref name="forsyth">''A Natural History of Sex'', 1991, by Adrian Forsyth</ref> While it is true that males are known to mate with and inject sperm into other males, there is however no evidence to suggest that this sperm ever fertilizes females inseminated by the victims of such acts.<ref name="carayon1966"/> ===Young=== [[Female]] bedbugs can lay up to five eggs in a day and 500 during a lifetime. The eggs are visible to the naked eye measuring 1 mm in length (approx. two grains of salt) and are a milky-white tone. The eggs hatch in one to two weeks. The hatchlings begin feeding immediately. They pass through five molting stages before they reach maturity. They must feed once during each of these stages. At room temperature, it takes about five weeks for a bedbug to pass from hatching to maturity. They become reproductively active only at maturity. ==Bites== <!-- Image with unknown copyright status removed: [[Image:bedbugbite.jpg|100px|thumb|left|Bedbug bite on Forearm]] --> <!-- Image with unknown copyright status removed: [[Image:bebugbite2.jpg|100px|thumb|right|Bedbug bite on Forearm]] --> In most observed cases a small, hard, swollen, white welt may develop at the site of each bedbug bite. This is often surrounded by a slightly raised red bump and is usually accompanied by severe itching that lasts for several hours to days. Welts do not have a red spot in the center such as is characteristic of flea bites. In other cases, it is observed that welts first appear upon the incessant scratching that is triggered by the bite, and seem like a mosquito bite that increases in size upon scratching. Later, however, the welts subside but tend not to disappear like those from mosquitos, and persist for up to several weeks. This usually depends on the person's skin type, environment and the species of bug. Some individuals respond to bed bug infestations and their bites with anxiety, stress, and [[insomnia]]. <ref name="injury"> Susan C. Jones, PhD http://ohioline.osu.edu/hyg-fact/2000/pdf/2105.pdf Extension Fact Sheet "Bed Bugs, Injury" January, 2004 </ref> Individuals may also get skin infections and scars from scratching the bedbug bite locations. Most patients who are placed on systemic [[corticosteroids]] to treat the itching and burning often associated with bed bug bites find that the lesions are poorly responsive to this method of treatment. Antihistamines have been found to reduce itching in some cases, but they do not affect the appearance and duration of the lesions. Topical corticosteroids, such as [[hydrocortisone]], have been reported to expediently resolve the lesions and decrease the associated itching. <ref name="urticaria"> Mark D. Scarupa and Athena Economides, MD Journal of Allergy and Clinical Immunology "Bedbug bites masquerading as urticaria" Vol. 117, Issue 6, June 2006, p.1508-1509</ref> ===Disease transmission=== Bed bugs seem to possess all of the necessary prerequisites for being capable of passing diseases from one host to another, but there have been no known cases of bed bugs passing disease from host to host. There are at least twenty-seven known [[pathogens]] (some estimates are as high as forty-one) that are capable of living inside a bed bug or on its mouthparts. Extensive testing has been done in laboratory settings that also conclude that bed bugs are unlikely to pass disease from one person to another. <ref name="thebedbug"> Sean Rollo http://thebedbugresource.com/bedbugfaq6.htm The Bed Bug Resource "Can bed bugs pass diseases?" 2007</ref> Therefore bedbugs are less dangerous than some more common insects such as the [[flea]]. However, transmission of trypanosomiasis ([[Chagas disease]]) or [[hepatitis B]] might be possible in appropriate settings. <ref name="emed"> Robert A Schwartz MD, MPH http://www.emedicine.com/derm/topic600.htm EMedicine "Bedbug bites" [[March 28]], [[2007]]</ref> The salivary fluid injected by bed bugs typically causes the skin to become irritated and inflamed, although individuals can differ in their sensitivity. Anaphylactoid reactions produced by the injection of serum and other nonspecific proteins are observed and there is the possibility that the saliva of the bedbugs may cause [[anaphylactic shock]] in a small percentage of people. It is also possible that sustained feeding by bedbugs may lead to [[anemia]]. It is also important to watch for and treat any secondary bacterial infection. ==History== {{Globalize/USA}} Bedbugs were originally brought to the United States by early colonists from Europe. Bedbugs thrive in places with high occupancy, such as hotels. Bedbugs were believed to be altogether eradicated 50 years ago in the United States and elsewhere with the widespread use of DDT. Some current theories suggest they never really left. One recent theory about bedbug reappearance involves potential geographic epicenters. Investigators have found two apparent United States epicenters at poultry facilities in Arkansas and Texas. It was determined that workers in these facilities were the main spreaders of these bedbugs, unknowingly carrying them to their places of residence and elsewhere after leaving work.<ref name="urban">Austin, James.http://urbanentomology.tamu.edu/bedbugs/bedbugs.cfm</ref> Bedbug populations in the United States have increased by 500 percent in the past few years. The cause of this resurgence is still uncertain, but most believe it is related to increased international travel and the use of new pest-control methods that do not affect bedbugs.<ref name="owen">James Owen http://news.nationalgeographic.com/news/2004/05/0513_040513_bedbugs.html National Geographic “Bloodthirsty Bedbugs Stage Comeback in U.S., Europe” May 13,2004. </ref> In the last few years, the use of baits rather than insecticide sprays is believed to have contributed to the increase. ===Resurgence of bedbug infestations=== As previously stated, bedbugs were all but eradicated from North America during the 1940s and 1950s. However, bedbug cases have been on the rise recently, not only in North America, but across the world. Prior to the mid-twentieth century, bedbugs were very common. According to a report by the UK Ministry of Health, in 1933 there were many areas where all the houses had some degree of bedbug infestation.<ref name="boase"> Boase, Clive J, "Bed-bugs - reclaiming our cities" The Pest Management Consultancy, Haverhill, UK, Biologist April 2004, Vol. 51 issue 1, p9-12 </ref> Since the mid-1990s, reports of bedbug cases have been rising. Figures from one London borough show reported bedbug infestations doubling each year from 1995 to 2001. The rise in bedbug infestations has been hard to track because bedbugs are not an easily identifiable problem. Most of the reports are collected from pest-control companies, local authorities, and hotel chains.<ref name="boase" /> Therefore, the problem may be more severe than is currently believed.<ref name="urticaria" /> As stated above, the most-cited reason for the dramatic worldwide rise in bedbug cases in recent decades is increased international travel.<ref name="parasitology"> Masetti, Massimo and Bruschi, Fabrizio "Bedbug Infestations recorded in Central Italy" Parasitology International Volume 56, Issue 1, March 2007, p81-83 </ref> In 1999, four separate infestations throughout the [[United Kingdom]] alerted people to the possibility of an increase in the worldwide bedbug population, facilitated by international travel and trade. However, there is evidence of a previous cycle of bedbug infestations in the United Kingdom. The Institution of Environmental Health Officers maintained statistics for bedbug infestations -- data collected from reports and inspections. In the period 1985-1986, the Institution of Environmental Health Officers reported treating 7,771 infestations in England and Wales, and 6,179 infestations in 1986-1987. There were also reports of infestations in Belfast and in Scotland.<ref name="king"> King, F; Dick, I; Evans, P. ''Bed bugs in Britain.'' Parasitology Today. Vol. 5, no. 4, pp. 100-102. 1989 </ref> ==New York City== New York City has been riddled with bedbug infestations since the early 21st century. Bedbugs have found their way into hotels, schools, and even hospital maternity wards. Jeffrey Eisenberg, owner of Pest Away Exterminating on the Upper West Side, claims his company currently receives 125 calls a week, compared to only a few just five years ago. In 2004, New York City had 377 bedbug violations. However, in the five-month span from July to November 2005, 449 violations were reported in the city, an alarming increase in infestations over a short period of time. Exterminators and entomology experts believe this is because so many international travelers visit New York each day.<ref name"jacobs"> Jacobs, Andrew [http://www.nytimes.com/2005/11/27/nyregion/27bugs.html “Just Try to Sleep Tight. The Bedbugs are Back.”] New York Times, New York, N.Y. Nov 27, 2005 pg1.1.</ref> Since 1999, infestations have been reported in the United Kingdom, [[Germany]], [[Spain]], [[Australia]], [[Canada]], and the United States. Two separate studies in [[Tuscany]], [[Italy]] offer further correlation of international travel with a resurgence in bedbug infestations. In case 1, in summer 2003 a seven-year-old boy developed a number of [[papule|papulae]] that caused severe itching on his lower legs. His parents suspected insects in the boy’s room, and found several in the folds of his mattress. Two specimens were identified as ''C. lectularius'' and the room was treated with an insecticide. The house had never been infested with bedbugs before. However, one month earlier, two family friends had flown from Nepal to stay with the family for ten days. In Case 2, a forty-eight-year-old man traveled by car to [[Pisa]], [[Italy]] from [[Prague]], [[Czech Republic]] in June 2003 and stayed in a rented house with three friends. After several days, the man noticed several [[bullous]] eruptions in linear patterns of three on his upper and lower [[extremities]]. The man found several insects in his room that were identified as ''C. lectularius''. The rented house was well kept and had never had a bedbug infestation. However, a group of Germans had rented the house a few weeks before the Czech group arrived.<ref name="parasitology"> Masetti, Massimo and Bruschi, Fabrizio "Bedbug Infestations recorded in Central Italy" Parasitology International Volume 56, Issue 1, March 2007, p81-83 </ref> Bedbugs had nearly been eradicated by the widespread use of potent insecticides such as DDT. However, many of these strong insecticides have been banned from the United States and replaced with weaker insecticides such as [[pyrethroids]]. Many bedbugs have grown resistant to the weaker insecticides. In a study at the [[University of Kentucky]] bedbugs were randomly collected from across the United States. These “wild” bedbugs were up to several thousands of times more resistant to pyrethroids than were laboratory bedbugs.<ref name="voiland"> Voiland, Adam "You May not be Alone" U.S. News & World Report 7/16/2007, Vol. 143, Issue 2, p53-54 </ref> Another problem with current insecticide use is that the broad-spectrum insecticide sprays for cockroaches and ants that are no longer used had a collateral impact on bedbug infestations. Recently, a switch has been made to bait insecticides that have proven effective against cockroaches but have allowed bedbugs to escape the indirect treatment.<ref name="boase" /> The number of bedbug infestations has risen significantly since the early 21st century. The [[National Pest Management Association]] reported a 71% increase in bedbug calls between 2000 and 2005.<ref name="voiland" /> The Steritech Group, a pest-management company based in [[Charlotte]], [[North Carolina]], claimed that 25% of the 700 hotels they surveyed between 2002 and 2006 needed bedbug treatment. In 2003, a brother and sister staying at a [[Motel 6]] in [[Chicago]] were awarded $372,000 in punitive damages after being bitten by bedbugs during their stay. These are only a few of the reported cases since the turn of the 21st century.<ref name="initi"> Initi, John "Sleeping with the Enemy" Maclean's, 1/14/2008, Vol. 121, Issue 1, p54-56 </ref> ==Infestations== [[Image:DSCF0005.JPG|200px|thumb|right|Bedbug (shown on writing paper)]] {{Unreferencedsection|date=February 2008}} There are several means by which dwellings can become infested with bedbugs. People can often acquire bedbugs at hotels, motels, and bed-and-breakfasts, as a result of increased domestic and international tourism, and bring them back to their homes in their luggage. They also can pick them up by inadvertently bringing infested furniture or used clothing to their household. If someone is in a place that is severely infested, bedbugs may actually crawl onto and be carried by people's clothing, although this is atypical behavior &mdash; except in the case of severe infestations, bedbugs are not usually carried from place to place by people on clothing they are currently wearing. Finally, bedbugs may travel between units in multi-unit dwellings (such as condominiums and apartment buildings), after being originally brought into the building by one of the above routes. This spread between units is dependent in part on the degree of infestation, on the material used to partition units (concrete is a more effective barrier to the spread of the infestation), and whether infested items are dragged through common areas while being disposed of, resulting in the shedding of bedbugs and bedbug eggs while being dragged. In some exceptional cases, the detection of bedbug hiding places can be aided by the use of dogs that have been trained to signal find the insects by their scent much as dogs are trained to find drugs or explosives. A trained team (dog and handler) can detect and pinpoint a bedbug infestation within minutes. This is a fairly costly service that is not used in the majority of cases, but can be very useful in difficult cases. The numerical size of a bedbug infestation is to some degree variable, as it is a function of the elapsed time from the initial infestation. With regards to the elapsed time from the initial infestation, even a single female bedbug brought into a home has a potential for reproduction, with its resulting offspring then breeding, resulting in a [[geometric progression]] of population expansion if control is not undertaken. Sometimes people are not aware of the insects, and do not notice the bites. The visible bedbug infestation does not represent the infestation as a whole, as there may be infestations elsewhere in a home. However, the insects do have a tendency to stay close to their hosts (hence the name "bed" bugs). ===Common location of infestations=== [[Image:Cimex lectularius2.jpg|175px|thumb|left|Blood-fed ''Cimex lectularius'']] Bedbugs travel easily and quickly along pipes and boards, and their bodies are very flat, which allows them to hide in tiny crevices. In the daytime, they tend to stay out of the light, preferring to remain hidden in such places as mattress seams, mattress interiors, bed frames, nearby furniture, carpeting, baseboards, inner walls, tiny wood holes, or bedroom clutter. Bedbugs can be found on their own, but more often congregate in groups. Bedbugs are capable of travelling as far as 100 feet to feed, but usually remain close to the host in bedrooms or on sofas where people may sleep. ===Detection=== [[Image:Cimex lectularius 3.jpg|thumb|Slide of ''Cimex lectularius'']] Bedbugs are known for being elusive, transient, and [[nocturnal]], making them difficult to detect. While individuals have the option of contacting a pest control professional to determine if a bedbug infestation exists, there are several do-it-yourself methods that may work equally well. The presence of bedbugs may be confirmed through identification of the insects collected or by a pattern of bites. Though bites can occur singularly, they often follow a distinctive linear pattern marking the paths of blood vessels running close to the surface of the skin. The common bite pattern of three bites often around the ankle or shin close to each other has garnered the macabre colloquialism "breakfast, lunch, dinner." A technique for catching bedbugs in the act is to have a light source quickly accessible from your bed and to turn it on at about an hour before dawn, which is usually the time when bedbugs are most active. A flashlight (torch in the UK) is recommended instead of room lights, as the act of getting out of bed will cause any bedbugs present to scatter before you can catch them. If you awaken during the night, leave your lights off but use your flashlight (torch) to inspect your mattress. Bedbugs are fairly fast in their movements, about equal to the speed of ants. They may be slowed down if engorged.When the bedroom light is switched on,it may temporarily startle them allowing time for you to get a dust pan and brush kept next to the bed and sweep the bugs into the pan then immediately sweep them into a cup or mug full of water where the bugs drown quickly.Dispose of the water down the sink or toilet.Disinfect the mattress,skirting boards and so on regularly. Glue traps placed in strategic areas around the home, (sometimes used in conjunction with heating pads, or balloons filled with exhaled breath, thus offering the carbon dioxide that bedbugs look for) may be used to trap and thus detect bedbugs. This method has varied reports of success. There are also commercial traps like "flea" traps whose effectiveness is questionable except perhaps as a means of detection. Perhaps the easiest trapping method is to place double-sided carpet tape in long strips near or around the bed and check the strips after a day or more. ===Controlling infestations=== With the widespread use of [[DDT]] in the 1940s and [[1950s|'50s]], bedbugs all but disappeared from [[North America]] in the mid-twentieth century.[http://money.cnn.com/2005/11/28/real_estate/buying_selling/bedbugs_redux/index.htm] Infestations remained common in many other parts of the world, however, and in recent years have begun to rebound in North America. Reappearance of bedbugs in North America has presented new challenges for pest control without DDT and similarly banned agents. Another reason for their increase is that pest control services more often nowadays use low toxicity gel-based pesticides for control of cockroaches, the most common pest in structures, instead of residual sprays. When residual sprays meant to kill other insects were commonly being used, they resulted in a collateral insecticidal effect on potential bedbug infestations; the gel-based insecticides primarily used nowadays do not have any effect on bedbugs, as they are incapable of feeding on these baits. The National Pest Management Association, a US advocacy group for pest management professionals (PMPs) conducted a "proactive bed bug public relations campaign" in 2005 and 2006, resulting in increased media coverage of bedbug stories and an increase in business for PCOs, possibly distorting the scale of the increase in bedbug infestations.<ref>[http://www.pctonline.com/news/news.asp?ID=4033]</ref> If it is necessary to live with bedbugs in the short term, it is possible to create makeshift temporary barriers around a bed. Although bedbugs cannot fly or jump, they have been observed climbing a higher surface in order to then fall to a lower one, such as climbing a wall in order to fall onto a bed. That having been said, barrier strategies nevertheless often have beneficial effects: an elevated bed, for example, can be protected by applying double-sided sticky tape (carpet tape, or make a loop of one-sided tape sticky side out) around each leg, or by keeping each leg on a plastic furniture block in a tray of water. Bed frames can be effectively rid of adult bedbugs and eggs by use of steam or, used with caution, by spraying [[rubbing alcohol]] on any visible bugs (although this is not a permanent treatment). Small steam cleaners are available and are very effective for this local treatment. A suspect mattress can be protected by wrapping it in a painter's disposable plastic drop cloth, neatly sealing shut all the seams with packing tape, and putting it on a protected bed after a final visual inspection. Bedding can be sanitized by a 120 °F (49 °C) laundry dryer. Once sanitized, bedding should not be allowed to drape to the floor. An effective way to quarantine a protected bed is to store sanitized sleeping clothes in the bed during the day, and bathing before entering the bed. Food-grade [[diatomaceous earth]] (DE) can be sprinked under mattresses, along baseboards and on the edges of bookshelves where bed bugs hide. Food-grade DE, although harmless to mammals, including common house pets and humans, is a virtual death sentence for bed bugs. DE is a drying agent and is actually used in many dry pet foods to keep the kibble dry and fresh. The DE particles abrade the bed bug, essentially dehydrating it of water and [[lipids]]. [[Neem oil]] (mentioned below) can be added to the DE (1 cup DE to 20 drops neem oil) in a plastic bag before sprinking it around. Other [[essential oil]]s that can be added are juniper oil, [[eucalyptus oil]], [[ylang ylang]] oil, [[rosemary]] oil and [[tea tree oil]]. The bed bugs hate the smell of the oils, and for those who don't and pass through, they will eventually be killed by the DE itself. Use 20 drops of each essential oil mentioned for each cup of DE. Alternative treatments that may actually work better and be more comfortable than wrapping bedding in plastic that would cause sweating would be to encase your mattress and box springs in impermeable bed bug bite proof encasements after a treatment for an infestation. There are many products on the market but only some products have been laboratory tested to be bed bug bite proof. Make sure to check to see that the product you are considering is more than an allergy encasement, but is bed bug bite proof. Vermin and pets may complicate a barrier strategy. Bedbugs prefer human hosts, but will resort to other warm-blooded hosts if humans are not available, and some species can live up to eighteen months without feeding at all. A co-infestation of mice can provide an auxiliary food source to keep bedbugs established for longer. Likewise, a house cat or human guest might easily defeat a barrier by sitting on a protected bed. Such considerations should be part of any barrier strategy. [[BBC1]] aired a television program entitled "The One Show" about the growth of bed bug infestations in [[London]]. In the program a pest control officer claimed that the use of insecticides alone was no longer an effective method to control bed bugs as they had developed a resistance to most if not all insecticides that might be used legally in the UK. He stated that insecticide use in conjunction to freezing bed bugs was the only effective control. All items of clothing and upholstery (including curtains) in the affected household had to be deep-frozen for at least 3 days in giant freezers to ensure complete eradication. The exact temperature at which bed bugs must be frozen was not mentioned. Another method that might be useful in controlling bed bugs is the use of [[neem oil]]. It can be sprayed on carpets, curtains and mattresses. Neem oil is made from the leaves and bark of the neem tree native to India. It has been used safely for thousands of years in India both as a natural, effective insect repellent and it is antibacterial. It has recently received US Food and Drug Administration approval for external use. It is also possible to incorporate neem oil into certain types of mattress. Such mattresses are currently being manufactured by a German company. ==Travel Tips== Since most bedbugs are carried by travellers through contact with beds and hotel rooms of infected locations, following are some tips for those travelling to hotels that might be at risk.<br /> #First look at the room to seek potential hiding places for bedbugs, such as carpet edges, mattress seams, pillow case linings, bedboards, wall trim or other tiny crack-like places bedbugs might hide. #Next, look specifically at the mattress seams for signs of bedbug activity: droppings, eggs, bloodstains or even bedbugs themselves, hiding in tiny folds and seam lines. #As mentioned, keep a flashlight nearby when sleeping, to immediately observe activity during the night without having to get up out of bed, thus giving bedbugs time to hide in safety. #Never leave your clothing laying on the bed, or any location of possible infestation (as mentioned above). Instead, use hangers or hooks capable of keeping all cloth distant from the floor or bed. #Close your suitcase, travel bag, when you're not using it. This way, during the night the bugs may move over top of your luggage with greater difficulty to get inside. #Elevate your luggage off the floor to tables or chairs. These may also be hiding places, but less likely. #Keep any bedbug you find (intact if possible) to show the hotel owner. #If you have a bad feeling about a location, trust your instinct. Look carefully for possible activity, or change locations. ==Current research== The [[Texas A&M]] Center for Urban and Structural [[Entomology]] and the [[University of Arkansas]] Department of Entomology have been collaborating to study bed bugs on a genetic level in the hopes to shed light on the their recent resurgence. By studying the [[genetic variation]] within bed bug populations, researchers can gain insight into [[insecticide resistance]] and insect dispersal. Researchers have two theories as to how bed bug resurgence has occurred in the United States. One theory is that the source of current bed bug populations is from other countries without bed bug pesticides that have made their way through air travel, and another theory is that the surviving bed bug populations were forced to switch hosts to birds, such as [[poultry]], and [[bats]]. Since bed bugs have undergone a huge resurgence in poultry populations since the 1970s, theory two seems likely. The theory that the surviving bed bug populations were forced to switch hosts to birds is also supported by the research done at Texas A&M and the University of Arkansas. In a recent study, researchers subjected 136 adult bed bugs from 22 sampled populations from nine U.S. states, Australia, and Canada to genetic analysis. Their finding concluded that the bed bug populations were never completely eradicated from the United States as there was no evidence of a [[genetic bottleneck]] in either the [[mitochondrial]] or [[nuclear DNA]] of the bed bugs. Researchers suspect that resistant populations of bed bugs have slowly been propagating in poultry facilities, and have made their way back to human hosts via the poultry workers.<ref>Szalanski, Allen L., James W. Austin, Jackie A. McKern, C. Dayton Steelman, and Roger E. Gold. 2008.Mitochondrial and Ribosomal Internal Transcribed Spacer 1 Diversity of Cimex electuaries (Hemiptera: Cinicidae). J. Med. Entomol.. 45(2):229-236</ref><ref>Austin, James.http://urbanentomology.tamu.edu/bedbugs/bedbugs.cfm. "Bed Bugs, Cimex lectularius."2007</ref> Other research is being conducted at Texas A&M and [[Virginia Tech]] to be able to use bed bugs in [[forensic science]]. Researchers are working on, and have been successful at, isolating and characterizing human [[DNA]] taken from bed bug blood meals. One advantage that bed bugs have over other blood feeders being used in forensics is that they do not remain on the host, and instead remain in close proximity to the [[crime scene]]. Therefore bed bugs could potentially provide crucial evidence linking the [[suspect]] to the crime scene. Researchers are able to identify what hosts are being fed upon, and are taking further steps to be able to identify the individual by [[genotyping]], and to predict the duration from the time of feeding to recovery of viable DNA. <ref>Szalanski, Allen L., James W. Austin, Jackie A. McKern, C. Dayton Steelman, Dini M. Miller, and Roger E. Gold. 2007 Isolation and Characterization of Human DNA from Bed Bugs, Cimex electuaries L., (Hemiptera: Cinicidae) Blood Meals. J. Agric. Urban Entomol. 23(3):189-194</ref> ==References== {{reflist}} ==Further reading== * Larry Pinto, Richard Cooper, Sandy Kraft. ''Bed Bug Handbook: The Complete Guide to Bed Bugs and Their Control.'' Mechanicsville, Maryland: Pinto & Associates, December 2007. ISBN 978-0-9788878-1-0 * Forsyth, Adrian. ''Die Sexualität in der Natur. Vom Egoismus der Gene und ihren unfeinen Strategien.'' Munich: Deutscher Taschenbuch Verlag, 1991. ISBN 3-423-11331-6. * Forsyth, Adrian. ''A Natural History of Sex: The Ecology and Evolution of Mating Behavior''. Richmond Hill, Ontario: Firefly Books, 2001. ISBN 1-55209-481-2. * Goddard, Jerome A. ''The Physician’s Guide to Arthropods of Medical Importance'' (second edition). Boca Raton, Florida: CRC Press, 1993. ISBN 0-8493-5160-X. * MacQuitty, Miranda, and Lawrence Mound. ''Megabugs: The Natural History Museum Book of Insects''. New York: Random House Children's Books, 1995. ISBN 1-898304-37-8, ISBN 1-85868-045-X. * Quammen, David. ''The Flight of the Iguana: A Sidelong View of Science and Nature''. New York: Delacorte Press, 1988. ISBN 0-385-29592-8, ISBN 0-385-26327-9, ISBN 0-684-83626-2. Provides detail about ''Xylocaris maculipennis''. * Smithereen Pest Control (Chicago, Illinois), employees of. Personal interviews. August 2005. (Used for [http://en.wikipedia.org/w/index.php?title=Bedbug&oldid=22917342 semi-rewrite].) * Martin Leverkus, Ryan C. Jochim, Susanne Schad et al. Bullous allergic hypersensitivity to bed bug bites mediated by IgE against salivary nitrophorin. J. Invest. Dermatol. (2006) 126, 91-96. ==External links== {{Wikisource1911Enc|Bug (insect)}} * [http://www.nyc.gov/html/doh/html/vector/vector-faq1.shtml] The New York City Department of Health and Mental Hygiene "Vector surveillance and control: Bed bug fact sheet" [[January 12]], [[2008]] * [http://www.soilandhealth.org/03sov/0302hsted/030212campbell/campbell%203-1.htm ''My Observations on Bedbugs'', by Dr. Charles A.R. Campbell] (historical interest only) * [http://npic.orst.edu/pestpub.html#BedBugs Bed Bugs Pest Control Information - National Pesticide Information Center] * KidsHealth.Org: [http://kidshealth.org/kid/ill_injure/bugs/bedbug.html "Hey! A Bedbug Bit Me!"] * eMedicine, July 2006: ''[http://www.emedicine.com/derm/topic600.htm Bedbug bites]'', Robert A. Schwartz, MD, MPH, et al. * [http://www.bedbugcentral.com/bed_bugs_101.asp Bed Bugs 101: Information Everyone Should Know about Bed Bugs] By Richard Cooper, Entomologist and Pest Control Operator. <!-- information from these sources should be incorporated into the article as referenced material, or simply removed if no additional useful content can be found. ATTENTION, PEST CONTROL AGENCIES: YOUR CONTRIBUTIONS TO THIS ARTICLE AS A PROFESSIONAL IN THE FIELD IS INVALUABLE, BUT PLEASE KEEP IN MIND WIKIPEDIA'S STRICT POLICIES AGAINST SPAM. PLEASE ALLOW YOUR HOPEFULLY EXCELLENT CONTRIBUTIONS TO ADVERTISE YOUR PROFESSION AND/OR BUSINESS, AND PLEASE DO NOT DIRECTLY ADVERTISE WITHIN THIS ARTICLE OR WITHIN THE EXTERNAL LINKS! ==== Information from specialized sources ==== '''University or colleges''' * Harvard University: ** [http://www.uos.harvard.edu/ehs/pes_bedbug.shtml Harvard University University Operations Services: Bedbug Information] ** [http://www.hsph.harvard.edu/bedbugs/ Harvard School of Public Health: Bedbugs: Biology and Management] * ''University of Minnesota Extension Service Entomology Yard & Garden Brief'': "[http://www.extension.umn.edu/yardandgarden/ygbriefs/e608maskedhunter.html Masked Hunters]" (natural enemy of the bedbug) * [http://www.uky.edu/Agriculture/Entomology/entfacts/struct/ef636.htm University of Kentucky EntFacts Information Sheet on bedbugs] * [http://medent.usyd.edu.au/fact/bedbugs.html University of Sydney and Westmead Hospital Department of Medical Entomology web-page on bedbugs] * [http://www1.umn.edu/umnnews/Feature_Stories/Bloodthirsty_travelers3A_Bedbugs_are_biting_again.html?enewsemail University of Minnesota] * [http://creatures.ifas.ufl.edu/urban/bed_bug.htm Bed Bug] University of Florida Featured Creatures *{{National Public Radio|13829937}} *[http://www.businessweek.com/smallbiz/content/nov2007/sb2007118_006807_page_2.htm] Business Week "The Cost of Bed Bugs" [[November 8]], [[2007]], 6:16PM EST * ''KYW CBS 3 (Phila.)'', [[18 June]] [[2007]]: [http://cbs3.com/seenon/local_story_169210456.html "Bed Bug Beagle (Article and Video)"] * ''The Trenton Times'', [[10 May]] [[2007]]: [http://www.nj.com/living/times/index.ssf?/base/living-0/1178771310234990.xml&coll=5 "Battling bedbugs"] * ''San Francisco Chronicle'', [[8 April]] [[2007]]: [http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/04/08/MNGIDP4V7K1.DTL "Bedbugs Bounce Back: Outbreaks inall 50 states"] * ''Fox News'', [[15 January]] [[2007]]: [http://www.foxnews.com/story/0,2933,243750,00.html "Lawyer Sues London Hotel, Claims Bedbugs Attacked Him, Wife"] * ''Pest Control Magazine'', [[1 January]] [[2007]]: [http://www.pestcontrolmag.com/pestcontrol/article/articleDetail.jsp?id=398370 "Are Bed Bug Dogs Up to Snuff?"] * ''New York Times'', [[15 October]] [[2006]]: [http://www.nytimes.com/2006/10/15/realestate/15cov.html "Everything You Need to Know About Bedbugs But Were Afraid to Ask"] * ''Toronto Star''. [[10 October]] [[2006]]: [http://www.thestar.com/NASApp/cs/ContentServer?pagename=thestar/Layout/Article_Type1&c=Article&cid=1160430612350&call_pageid=968350130169&col=969483202845 "Don't Let the Bedbugs Bite Again."] * ''New York Post''. [[26 September]] [[2006]]: [http://www.nypost.com/seven/09262006/gossip/pagesix/whats_eating_ralph_lauren__pagesix_.htm "What's Eating Ralph Lauren?"] * ''New York Times'', [[19 September]] [[2006]]: [http://www.nytimes.com/2006/09/19/nyregion/19bedbugs.html?ex=1290747600&en=3f15540faed107cf&ei=5090&partner=rssuserland&emc=rss "Another Reason the City Never Sleeps: More Bedbugs."] * ''New York Times'', [[27 November]] [[2005]]: [http://www.nytimes.com/2005/11/27/nyregion/27bugs.html?ex=1290747600&en=3f15540faed107cf&ei=5090&partner=rssuserland&emc=rss "Just Try to Sleep Tight. The Bedbugs Are Back."] * ''New Yorker'', [[4 April]] [[2005]]: [http://www.newyorker.com/talk/content/articles/050404ta_talk_singer "Night Visitors"] * ''Emerging Infectious Diseases'', Vol. 11, No. 4, April 2005: ''[http://www.cdc.gov/ncidod/EID/vol11no04/04-1126.htm Bed Bug Infestations in an Urban Environment]'', Stephen W. Hwang, Tomislav J. Svoboda, Iain J. De Jong, Karl J. Kabasele, and Evie Gogosis * ''New York Times'', [[2 November]] [[2003]] : [http://www.nytimes.com/2003/11/02/nyregion/02bedb.html?ex=1383109200&en=0c8b915eb62d9bba&ei=5007&partner=USERLAND&pagewanted=print "Sleep Tight, and Don't Let ... Oh Just Forget About It"] * ''Dermatology Online Journal'', Vol. 5, No. 1, May 1999: ''[http://dermatology.cdlib.org/DOJvol5num1/centerfold/cimex.html Cimex lectularius]'', Arthur C. Huntley, M.D. * ''San Diego Union Tribune'', [[17 December]] [[2007]]: [http://www.signonsandiego.com/uniontrib/20071217/news_1n17tort.html Tribal justice not always fair, critics contend] (Bedbugs in casinos) end of HTML comment--> {{SleepSeries2}} [[Category:Hemiptera]] [[Category:Parasites]] [[ar:بق الفراش]] [[bg:Креватна дървеница]] [[da:Væggelus]] [[de:Bettwanze]] [[es:Chinche]] [[eo:Cimo (insekto)]] [[fr:Punaise des lits]] [[gl:Chinche]] [[io:Cimo]] [[it:Cimicidae]] [[he:פשפשאי מיטה]] [[lt:Patalinė blakė]] [[nl:Bedwants]] [[ja:トコジラミ]] [[no:Veggdyr]] [[pl:Pluskwa domowa]] [[ru:Постельный клоп]] [[sk:Ploštica posteľná]] [[sl:Zajedavske stenice]] [[su:Tumbila]] [[fi:Lutikka]] [[sv:Vägglus]] [[uk:Клоп постільний]]