The efficacy of ivermectin and pyrantelpamoat in the equine small strongyles

anthelminthique anthelmintics caballos cheval ciclo vital control de plagas cyathostoma diagnosis diagnostic epidemiologia epidemiologie epidemiology grazing higiene horses hygiene infecciones por nematodos ivermectin ivermectina ivermectine life cycle lutte antiravageur nematode infections pastoreo pest control pirantel pyrantel symptome symptoms