We already know LPS can and has induced PD in a 22 year old, see here:

http://neurotalk.psychcentral.com/thread171246.html

Why folks don't try some antibiotic or the like, just to try, is beyond me, particularly when you consider how many PWP report incredible reduction of symptoms when on an antibiotic for something else, like tooth infection, etc. True, these are trials of one, and anecdotal, but I have read on a couple of forums of more than a few PWP whose symptoms significantly abate or outright disappear when on an antibiotic, only to return once the antibiotic has been discontinued. Seems like this would be an obvious thing to try, just to know one way or the other. But no real money in that, plus, it might actually cure folks, and they dont' want that, either.