http://youtu.be/dH55wVVP7Y0
The recent resurgence of bedbugs can be traced back to the ban on DDT, which had virtually eliminated the pests. After DDT was banned because of the harmful effects on humans and the environment, bedbugs began to reappear, and their comeback was aided by several other factors. The elimination of DDT overlapped with the development of safer chemicals that could kill cockroaches, a natural predator for bedbugs.
Air travel has become more widespread and less expensive, creating more opportunities for bed bugs to travel with passengers, “shabby chic” trend of purchasing infested second-hand furniture, and bed bugs have mutated over time to become more mobile and develop resistance to insecticides, making the pests harder to detect and kill. The worst effects of a bedbug infestation are usually psychological rather than physical. The best way to eliminate an infestation completely is to seek help from professional pest control companies, who may use traps, growth inhibitors, insecticides or, in extreme cases, thermal remediation, which kills the pests with high heat.
http://www.delta-optimist.com/opinion/blogs/deltabc-1.983313/blog-bed-bugs-ride-the-perfect-storm-1.2037996