A New Zealand group is saying they tested the rooms where some visitors died in a Chiang Mai hotel, and found Chlorpyrifos, a chemical used in Thailand to treat bed-bug infestation. They believe this is the cause of deaths at the Downtown Inn in Chiang Mai.
The chemical is banned from indoor use in some countries. In the USA it is used only agriculturally.
The chemical has a half life of 1 day. Meaning, it’s very hard to trace.
Is this the answer we’ve been looking for? Bed bug spray? Wow…