I personally believe it is just mercury vapors and nothing else because the reaction I get is very evidentally mercury and nothing more. It is like breathing in a ton of toxicitiy (metallic). i can taste it and sense it, feel it and there are no other types of symptoms that would lead me to believe it's anything else.

I doubt it's bacteria, I'm around people with bugs all the time and never get those types of reactions. It's not those types of symptoms (at least for me it isn't). Dental visits never used to impact me at all until my immunity plummeted from an infection in 2003. Since then? I cannot walk into a dental office (even reception) without becoming toxic.

I remember I got ill onetime from being in a mechanics garage, because they were using some kind of stuff that was obviously very toxic to me. The reactions are definitely the kind where you know it's poison. And this kind was different from mercury, but similar in that I could sense it was a solvent/chemical toxic reaction.

Hard to explain.