Electron microscope image of a bed bug, digitally colorized with piercers
highlighted in purple and red.
tight, don't let the bedbugs bite," used to be a phrase without much meaning.
few people are smiling when it comes to bed bugs. While the first onslaught of the little pests began several years ago, experts are now predicting that for big metro areas like New York City bed bugs are back and badder than ever!
Bed bugs are
bugs, once nearly eradicated in most big cities, have made a big comeback recently,
especially in urban centers throughout the world... and that is not good news. Bed bugs don't pass
on disease, but these greedy little pests suck... your blood. And lots of it.
infants, who sleep in infested homes, have been found to be anemic due to the
amounts of blood these pests take. Older kids and adults can break out in welts
or worse from allergic reactions to the bites.
suits are being filed due to bed bug bites. Landlords and tenants have added
bed bugs to the list of things to fight over. The
hospitality industry in many major tourist destinations such as London, Sydney
and New York City is at war with these pests who may disturb the sleep of guests
even in some of the poshest hotels.
are several kinds of bed bugs but the one best adapted to the human environment
is known in Latin as Cimex (a bug) lectularius (lying
down at home). Another, the tropical bed bug, Cimex hemipterus, has
been found more recently in urban areas. The Eastern bat bed bug, Cimex adjunctus,
travels into homes on the bodies of the bats they feed on.
nocturnal pests feed about once every five to 10 days but are not thought to spread
disease. They are drawn to the carbon dioxide you exhale and the warmth of your
sleeping body. They use two tubes, one to inject an anticoagulant and mild anesthetic,
the other to suck blood.
live up to four months and one female will produce about 345
eggs during her lifespan. It only takes five feedings for
the newly hatched bed bug to begin adding to the population.
the name, they are not just found in beds. They like a place that's warm to call
home. They can enter through any tiny crack in a wall. Phone jacks and electrical
outlets are favorite nesting places.
bugs hit the road
view of bed bugs. (place cursor over image
to view actual size.)
with the spread of bedbugs our modern ability to travel from
place to place with ease. Bed bugs hitch rides on clothing
and other items. These
insects do not fly but they can crawl from a passenger sleeping
in an airplane seat to the next passenger. They can be passed
by contact with infected clothing on the subway and urban metro trains. Sitting on a bus or taxi seat where a bedbug has
been left behind can mean you are infesting the room where
you are staying. Because of their love of travel, many of
the best hotels are fighting to keep bed bugs under control.
Romans and medieval nobility knew the bite of a bed bug. They were a major problem
on passenger ships during the late 19th and early 20th century. Bed bugs traveled
to the Americas with the earliest European visitors and emigrated to Australia
on the ships that carried the early settlers from European ports.
DDT was introduced in the 1950s, the problem of bed beg infestations became less
frequent. Because of environmental concerns, DDT was banned in the 1970s.
Bed bugs began to reappear but pyrethroid insecticides were developed that were
as effective as DDT.
the past decade, levels of bed bug infestations have begun to rise again. In many
urban areas, they have reached epidemic levels.
the first study to explain the failure to control certain bed bug populations,
toxicologists at the University of Massachusetts Amherst and Koreas Seoul
National University show that some of these nocturnal blood suckers have developed
resistance to pyrethroid insecticides, in particular deltamethrin, that attack
their nervous systems.
study by senior researcher John Clark and colleagues in a recent issue of the
Journal of Medical Entomology revealed that these pests have evolved to
outsmart the latest generation of chemicals used to control them since DDT was
research found that bed bugs in New York City have acquired mutations in their
nerve cells, which blunt the neurotoxic effect of the pyrethroid toxins used against
them. The mutations affect sodium channels (resembling pores) in the neurons
outer membrane, where electrical nerve impulses are produced.
the past, these nervous system poisons could effectively paralyze and kill the
bugs, but this is no longer always the case. They found that resistance was not
due to the increased breakdown of deltamethrin (enzymatic metabolism) by the resistant
bed bugs but appeared to be due to an insensitive nervous system. Clark
and colleagues found that these pores in New York City bed bugs are now as much
as 264 times more resistant to deltamethrin. This means that even if treated,
New York City bed bugs go on to suck blood from unsuspecting sleepers for many
researchers are not sure how widely this resistance has spread. They don't know
whether the bugs that infest hotels, apartment buildings and homes in places other
than New York City have developed the same type of immunity to chemical control.
But as Clark states, This type of pyrethroid resistance is common in many
pest insects and the failure of the pyrethroids to control bed bug populations
across the United States and elsewhere indicates that resistance is already widespread.
How to get rid of bed bugs - treatment
researchers and experts warn that trying to get rid of bed bugs without using
professional exterminators may just make the problem worse. While some pesticides
seem to be getting less effective there are still effective methods to eliminate
bed bugs. Bed bugs have not shown resistance to a relatively new material, Phantom®
(chlorfenapyr). However, chlorfenapyr may require ten days kill the bugs. During
this ten-day period it is important to realize that the bugs may still be active
and females may wander and deposit viable eggs in other locations.
you are looking for a non-pesticide option to get rid of these pests, vacuuming,
steam and freezing are some techniques that have has limited success.
to a Pennsylvania State University statement updated in 2007, "Inorganic
materials such as silica gel, boric acid, and diatomaceous earth will provide
long term control, provided they are used in an environment with low humidity.
These inorganic materials have very low repellency, a long residual life, and
can provide good control if thoroughly applied to cracks and crevices. However,
they are typically white in color and may leave the surface of items with an undesirable
film unless they are carefully applied."
acid, or diatomaceous
earth are very unhealthy to breathe in and some can cause
eye irritation. Be sure to cover any mattress treated with
a plastic mattress cover to prevent inhaling the dust. The
diatomaceous earth (DE), also known as silicon dioxide, that
is used as a powder to treat bed bug infestations is NOT the
same DE that you use in your pool filter!
popular product to stop infestations is called Bed Bug Powder. It is a mix of
pyrethrum and diatomaceous earth.
DE that is formulated for pest control has been tested with animals and does not
seem to be harmful if eaten, but silica gel and boric acid are toxic when ingested.
Except in the case of DE, if you have pets or young children who may be tempted
to lick or eat the white powder, be careful to apply it only in areas that they
can't get to.
article is based on a press release provided by Newswise.