I was listening to Radio 2 today and they were talking about a NewZealand lady aged 23 who died at The Downtown Inn Hotel in Chiang Mai, her 2 friends also nearly died. It turns out that 6 previous guests including an elderley British couple have died at the same hotel since January 2011. The NZ girls father has set up a website to bring awareness to tourists going to Thailand, called www.thailandtraveltragedies.com.
After reading several posts from people it seems like tourist areas in Thailand are quite dangerous, my gut feeling is that these poor tourists have been killed by something in the water, and definitely not food. On Radio 2 an expert in toxic poisoning said that the NZ girls heart was inflated and her illness was sudden, he said these were not the symtpons of food poisoning more likely a toxic solution. Scary stuff, and news that is not reported widely in the media.