Comment by giardini

Years ago a friend invited me to help him brand his cattle. We rounded 'em up and sent each through a chute where we applied a dose of ivermectin to their back. The procedure was: measure, pour directly on their back and then spread it around with bare hands. We did this for an indeterminate number of cattle. He seemed unconcerned that _we_ were getting quite a dose through our skin too.

This friend has lived a remarkably healthy life - he was over 70, never got sick, and could toss hay bales with the best of them. Seeing how Ivermectin is applied, I'm fairly certain there wasn't (and isn't) a single parasite in his body, in his clothes, his pickup truck or his mobile home.