Evaluation of mastitis control programs.
D000818:Animals; D001315:Australia; D002170:Canada; D002417:Cattle; D003718:Denmark; D004739:England; D005069:Evaluation Studies as Topic; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D008414:Mastitis, Bovine / Q000209:etiology / Q000266:history / Q000382:microbiology / Q000517:prevention & control*; D008892:Milk / Q000382:microbiology; D013290:Streptococcal Infections / Q000266:history / Q000662:veterinary; D013292:Streptococcus agalactiae; D014481:United States