In the U.S., there are four anthelmintic drug classes: avermectins (macrocyclic lactones), benzimidazoles, imidazothiazoles and sulfonamide derivatives.

Parasites are growing resistant to dewormers used by many Missouri farmers to treat their cattle. That’s according to a new study from University of Missouri researchers. Parasites can cause weight ...

The use of commercial livestock dewormers has paid off in terms of animal health and productivity, but it has also resulted in resistance among parasite populations. “As dewormers lose effectiveness, ...

“Out of sight, out of mind” is an expression often used to describe something that cannot be seen, so it is easily forgotten. On the subject of herd health, this phrase can easily be applied to our ...

The risk of parasites during the grazing season can loom the whole summer, but most deworming products are unable to provide protection for the entire duration. Knowing what products are available, ...

Russ Daly, SDSU Extension veterinarian says that deworming calves can be one of the most beneficial management practices, however there are concerns about parasite resistance to dewormers. Many ...