Cattle nematodes resistant to anthelmintics: why so few cases?

Strongyle anthelmintic resistance in horses and cattle from Greece

Gastrointestinal nematode parasitism is an important cause of livestock disease, reduced productivity and welfare. In most cases, control of parasites is based on the use of anthelmintics or on the combination of anthelmintics and pasture management or recently, other alternatives to the use of chemicals. However, the frequent use of anthelmintics can select for resistant nematodes. Anthelminti...

Anthelmintic resistance in gastrointestinal nematodes of beef cattle in the state of Rio Grande do Sul, Brazil

Gastrointestinal nematodes resistant to anthelmintics have been reported in several regions of Brazil, and they may be associated with economic losses for the cattle industry. This study aimed to evaluate the resistance status of gastrointestinal nematodes from naturally infected beef cattle to several commercially available anthelmintics, as well as to test the efficacy of combinations of anth...

Multispecies and multiple anthelmintic resistance on cattle nematodes in a farm in Argentina: the beginning of high resistance?

There are very few resistance records on cattle nematodes. South American successive records have been increasing rapidly since the year 2000. In Argentina, increasing dissatisfaction based on the exclusive use of macrocyclic lactones has prompted the use of benzimidazoles in the Pampean region. The studied farm is located in the Argentina humid Pampas and had apparently poor results after anth...

Development of tools to detect anthelmintic sensitivity in UK cattle nematodes

Update on Anthelmintic Resistance in Gastrointestinal Nematode Parasites of Cattle: How Does This Change Optimal Approaches to Control?