Few days ago, I listened a NPR program on bed-bug, the news is a bit scary. Bed bugs were eliminated in around 1960s in USA as a result of excessive use of DDT. But DDT is now banned for its many reported side effects. Unfortunately the bed bugs started to appear again around a decade ago and since then it is spreading at exponential rate. There are no any known chemicals/pesticides (permissible to use) that can really kill bed bugs. They spread out from used furnitures, so be careful if anyone offering you used furnitures, that may be the source of bed bugs and keep ever expanding in your rest of the furnitures. The bed bugs are nucturnal, and can survive several months without any foods. In the NPR program, they even told that the only way of getting rid of bed bug is to destroy the furniture permanenty (if possible put them in fire).