By: Emma Hiolski
Picture an open pasture with woolly sheep grazing on lush green grass. Idyllic, right? What’s not so idyllic is that inside some of these animals’ guts, deadly parasitic worms could be thriving, sucking blood from the animals’ stomachs and depriving them of nutrients. Researchers around the world have reported finding drug-resistant roundworms—some resistant to multiple classes of standard treatments—in every type of livestock host, including sheep, cattle, and goats.