Thanks for all the really interesting and informative answers! I'm in Europe and I'm sorry to read that this doesn't seem to be handled any better in the US. Good point that so many people only suffer temporarily and many of those who don't wouldn't want to broadcast it anyway. I contracted my parasites on a trip abroad and they certainly didn't feature in the travel guides. Oddly enough, Malaria, Dengue, Yellow fever etc did. It's really time to raise the profile of other parasitic diseases.