Bed Bugs

Bed Bugs are the world’s greatest hitch-hikers, and can make themselves so flat they hide undetected in crevices and creases.
They live on warm blood, inside buildings and thrive in warm temperatures. Bed bugs spend most of their time in hiding but come out to feed once every few days; feeding promotes molting and reproduction. After feeding at night, they then scurry under or between something. Bed Bugs can live without nourishment (blood) for over 1 year and have become highly resistant to pesticides. So they are extremely difficult to abolish.
Bedbugs have become such an issue that there’s a dedicated site, bedbugregistry.com, where experiences are shared and hotels are named and shamed. (I’d take it with a grain of sea salt, as contributors are anonymous.)
In New York there were 500 cases of bedbug infestation in the city (not just hotels) reported in 2004. That rose to 10,000 cases in 2009 and is still on the rise