[eigenrick]

>Why do so few researchers study them?

Because they're the ones funding medical research! nyuk nyuk!

Seriously though, as a health nut who tries to stay on the science side of things, I still see a lot of "It's Parasites!" stuff from the pseudo-science health community. As well as bizarre cures. Walnuts, Cloves and electric shock seem to come up the most.

I have tried to find any practical advice regarding detection, symptoms and such, and beyond tapeworms, heartworms and hookworms, there isn't much information.