Case-control study of bovine mycoplasmal mastitis in California.
D000818:Animals; D002140:California; D002417:Cattle; D008414:Mastitis, Bovine / Q000453:epidemiology* / Q000382:microbiology; D009174:Mycoplasma / Q000302:isolation & purification; D009175:Mycoplasma Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D012621:Seasons