[Current mastitis problems in the U.S.A].
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D005260:Female; D008413:Mastitis / Q000453:epidemiology / Q000662:veterinary*; D011247:Pregnancy; D014481:United States
Aktuelle Mastitisprobleme in den USA