Don't be offended, the reason it is assumed that there is a high probability is because the presence of a parasite
creates an environment that is often hospitable to other parasites. In fact, a hospitable environment often preceeds all parasites. parasites
are often passing through our system in one of their many stages or in another. They don't take up residence if the person's body is healthy and free of toxic conditions.
are not restricted to foreign lands, they are everywhere. You don't have to leave the country to get an infection. That same restaurant that may have given you giardia could have given you many other parasites, that may or may not have shown up in your diagnosis.
While you are making an effort to rid you body of the known invader, it may be helpful to eliminate some of the other possible unwanted 'guests'. I'd suggest also, taking steps to detox while you are on the medication by upping your vitamin C intake, drinking lots of water, and drinking one of the detox teas available. I would suggest doing the Dr. Clark parasite
cleanse while you are on the meds, but since I am not qualified to determine possible interactions, I would just strongly suggest that you plan on doing one as soon as the meds are done.