title: Control of ticks systemically with Merck MK-933, an avermectin.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D007559:Ivermectin / Q000031:analogs & derivatives*; D007783:Lactones / Q000627:therapeutic use*; D013984:Tick Infestations / Q000517:prevention & control / Q000662:veterinary*
chemical_list: D007783:Lactones; C022120:avermectin B(1)a; D007559:Ivermectin; C019264:avermectin