Epidemiology of mastitis in three dairy herds.
D000818:Animals; D002417:Cattle; D004739:England; D005260:Female; D007774:Lactation; D008414:Mastitis, Bovine / Q000453:epidemiology* / Q000209:etiology; D008892:Milk / Q000382:microbiology*; D010406:Penicillins / Q000494:pharmacology; D011247:Pregnancy; D013210:Staphylococcus / Q000302:isolation & purification*; D013291:Streptococcus / Q000302:isolation & purification*
D010406:Penicillins