In Denmark, a recent study looked at how well ivermectin works against strongylid worms in horses. These worms are everywhere and can make horses very sick. One big problem is that these worms are getting resistant to the drugs meant to kill them. Some countries in Europe have made rules to limit how often these drugs can be used. The goal is to slow down the worms' ...

Meet Haemonchus contortus, a tiny worm that packs a big punch. It's one of the most troublesome parasites for sheep and goats, mostly because it's become resistant to many drugs. One group of drugs, called macrocyclic lactones (MLs), includes popular ones like ivermectin and moxidectin. Scientists still don't fully understand why some worms shrug off these drugs. The...

In the heart of Ethiopia, a unique farming system thrives where sheep, goats, and cattle share the same pastures. This communal grazing practice is the backbone of many people's livelihoods. However, a tiny yet powerful foe threatens this sustainable setup: gastrointestinal nematodes, or worms. With the global rise of anthelmintic resistance (AR), the situation becom...