Susceptibility to arthropod bites depends on many external factors, such as occupation, conditions of employment, cohabitation with a variety of domestic animals, housing, climate, and clothing. An arthropod is usually attracted to its host by body heat, carbon dioxide in exhaled air, vibration, human sweat, and/or odor. The Cimex (bedbug) genus attacks both mammals and birds. C hemipterus (the tropical bedbug) bites mostly humans and is found in warm climates, whereas C lectularius (the common bedbug) also attacks bats and domestic animals, such as chickens.
Determine which rooms are infested. Bedrooms are the principal locations for bed bugs; however, any room where people sleep in the home may provide harborage for bed bugs. Living rooms with sofas and sofa beds are the next most common sites for bed bugs. Typically an infestation starts in one room and spreads slowly to other places where people sleep.  The sooner you find and treat bed bugs the easier it will be to get rid of them.  Wait too long and bed bugs may be found throughout your home.
Symptoms may not appear until some days after the bites have occurred.[5] Reactions often become more brisk after multiple bites due to possible sensitization to the salivary proteins of the bed bug.[3] The skin reaction usually occurs in the area of the bite which is most commonly the arms, shoulders and legs as they are more frequently exposed at night.[5] Numerous bites may lead to an erythematous rash or urticaria.[5]
Check to see if you can identify the rust-colored fecal stains, egg cases, and shed skins (exuviae) in crevices and cracks on or near beds. A sweet, musty odor is sometimes present. You should also look at other areas such as under wallpaper, behind picture frames, in couches and other furniture, in bedsprings and under mattresses, and even in articles of clothing. While fecal stains and skin casts suggest that bedbugs have been present, these do not confirm that the infestation is still active. Observing the bedbugs themselves is definitive confirmation that an area is infested. You may require professional assistance from a pest-control company in determining whether your home has a bed bug problem.
You should look for traces of the insects in the folds of your mattresses, box springs and other places where they are likely to hide. You might be able to find their papery skins, which get cast off after molting and look like popcorn kernels but are smaller and thinner, Harlan said. They also leave small, dark-colored spots from the blood-filled droppings they deposit on mattresses and furniture. If you can touch the spot with a water-soaked towel and it runs a rusty, reddish color, you're probably looking at a fresh drop of bedbug feces, Harlan said.
If you arrive home and discover that you have brought some unwanted guests home with you, immediately notify the hotel of your discovery. Having a possible infestation in hotels and motels can be a public relations nightmare for the owners. Politely ask them to pay for any and all costs incurred to rid your clothing and home of a possible new infestation.
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