A dubious first for the United States with the country's first confirmed case of new world screworm in Maryland according to health officials there. This is a flesheating parasite that officials say was found earlier this month in somebody who had recently traveled to El Salvador. The good news they're saying that the risk this spreads is very low.This parasitic worm is usually found in animals. It can be found in pets for example, but it can be pretty damaging beyond that. It can kill whole herds of cattle ...