A field survey on anthelmintic resistance in equine small Strongyles in Norway

anthelminthique anthelmintics benzimidazole benzimidazoles caballos chemical resistance cheval control de plagas cyathostoma disease surveys efficiency eficacia encuestas sanitarias faeces feces heces horses ivermectin ivermectina ivermectine larvae larvas larve lutte antiravageur pest control pirantel pyrantel terapia therapy