I’m a frequent visitor to Thailand and spend a lot of time in the northern city of Chiang Mai, so I am naturally interested in learning the cause of a series of mysterious deaths that occurred there in January and February of this year.
Among the seven people who have died under similar circumstances was a young New Zealand tourist named Sarah Carter. While official pronouncements have yet to pinpoint a cause, a report by New Zealand TV3’s “60 Minutes” program has presented evidence that the deaths may have stemmed from the use of the chemical spray, chlorpyrifos, at the hotel where four of the seven deaths occurred. Chlorpyrifos is used to kill bed bugs. Since bedbugs have become more problematic everywhere over the past year or so, people need to be aware of the dangers inherent in the various methods of controlling them.
The New Zealand report can be found at: http://www.3news.co.nz/Sarah-Carters-likely-cause-of-death—insecticide/tabid/371/articleID/210265/Default.aspx
You can find more details about this story here.
Tom's News and Views 
This is so scary. Bed bugs are really a nuisance and they have attacked me before already. I refused to use pesticide since I believe this is dangerous for me and my kids. But I never thought that even Bed Bug Sprays could be dangerous. Thank you for sharing this! – Mel