Controlling mastitis.
D000818:Animals; D002417:Cattle; D004739:England; D005260:Female; D008414:Mastitis, Bovine / Q000517:prevention & control*; D008892:Milk / Q000382:microbiology; D010406:Penicillins / Q000627:therapeutic use; D011996:Records; D012621:Seasons; D014852:Wales
D010406:Penicillins