How about just don't eat them at all. I can't understand the fascination shown by the people on this thread with eating something that carries parasites. Why bother? Aren't they getting enough to eat? And BTW the incidence of trichonosis in today's pork in the USA is virtually nil. Do they also have "protected" sex with AIDS carriers? Do they routinely drive motorcycles 50 MPH over the speed limit in the rain?
Why do somthing that has a high know risk associated with it. Parasite eggs are particularly difficult to kill. From the comments on this thread some of my fellow freepers are seriously deficient in their mental ability to parse risk and reward.
There is risk of disease and parasitic infection when eating any wild fish or game. The risk represented by this snail, when properly cooked, ought not be any higher than that represented by eating any other wild animal.
Pretty much everything as some or other "high known risk". About these snails, we have insufficient data to draw a conclusion. The specific data needed is how cooking effects the potential pathogens. If cooking kills'em, then the risk is minimal.........JUST like eating pork (or bear meat).