From the website:
In 1980, he saw the first confirmed human death, a Pennsylvania boy who apparently had eaten feces from raccoons living in the family's chimney. Like the birds, the boy had neurological problems and trouble controlling his muscles. The autopsy showed roundworm larvae in his brain.
Previously on Neatorama: Six Horrifying Parasite
I always thought it was harmless to eat dirt.
This, folks, is why I have a raging phobia of parasites.
--TwoDragons