Yeah, mercury does everything it can to mess you over. I guess the bottom line is that mercury has got to go first because of it's far reaching consequences on the immune system and all the other factors that have ben mentioned in this thread.
Otherwise all other methods of removing pathogens and parasites would only bring temporary relief.
And you can google Hulda Clark and zapper for some sites on it. You might also want to check out Ken Presner and his "Ultimate Zapper".