commonly used for bedbug control. Previously, two treatments (initial and follow-up) used to effectively exterminate bedbug infestations, but new reports indicate that some populations may require five or more treatments to eliminate the problem -- some bugs may not be killed at all despite these chemical treatments. There could be several reasons of the resistance development in bedbugs. Part of the problem is that populations in the region of original infestation might have already been extensively exposed to the same or similar chemical being used in the newly infested areas. Further, most of the exterminators in Canada use a single chemical product (Tempo, a pyrethroid-based insecticide) for common household pest problems such as bedbugs, ants, wasps and flies etc. This means that most of the target (and non-target) pest populations might be unknowingly exposed to the same chemical over and over again, which could potentially lead to buildup of the resistant "superbug" populations. Homeowners and businesses should use caution when hiring an exterminator and insist that integrated pest management (IPM) strategy be used involving multiple tools -- less risky options should be the first choice! Tamara Szymanska Mon, 2012-07-09 00:36 Rana, thank you for the additional info. I have to admit I do have a problem with general statements made by media or authorities that bed bug problem in Vancouver is first unavoidable and second not dangerous. Even if it is just slight possibility, as your wrote, of "accidentally transfer pathogens from an infected individual to a healthy one", there