The morantel sustained release bolus in the control of gastro-intestinal nematodiasis of cattle in Switzerland (preliminary results)

agentes nocivos animal animal domestique animal nuisible animal pour cuirs et peaux animales animales de carne animales nocivos animals anthelminthique anthelmintics artiodactyla artiodactyle aschelminthes bovidae bovide bovin bovine bovines cattle digestive system diseases diseases domestic animals drugs europa europe facteur nuisible ganado ganado bovino helminthe helminths helmintos injurious factors invertebrados invertebrates livestock maladie de l'appareil digestif maladie organique mammals meat animals medicamentos nematode nematodes nematodos noxious animals organic diseases organisme nuisible pests plagas rumiante ruminant ruminants vertebrados vertebrates vertebre