title: Experimental colonization of the bovine teat duct with Corynebacterium bovis and the effect on milk somatic cell counts.
abstract: Colonization with Corynebacterium bovis was established in 59 of 64 (92%), 58 of 59 (98%) and 19 of 34 (56%) of uninfected bovine mammary quarters following inoculation of 83.3 X 10(4) colony-forming units (CFU) of the organism into the teat cistern, 4.7 X 10(3) CFU 5 mm into the teat duct or by exposure of the teat orifice to a milk culture containing 1.6 X 10(7) CFU/mL respectively. Mean somatic cell counts for foremilk samples from 122 quarters were significantly higher after colonization with C. bovis (145,900/mL) compared to before exposure (130,900/mL).
mesh_terms: D000818:Animals; D002417:Cattle / Q000378:metabolism / Q000382:microbiology*; D002452:Cell Count / Q000662:veterinary; D003352:Corynebacterium / Q000254:growth & development*; D005260:Female; D007774:Lactation; D007785:Lactose / Q000032:analysis; D008055:Lipids / Q000032:analysis; D008321:Mammary Glands, Animal / Q000382:microbiology*; D008892:Milk / Q000032:analysis / Q000166:cytology* / Q000378:metabolism; D008894:Milk Proteins / Q000032:analysis
chemical_list: D008055:Lipids; D008894:Milk Proteins; D007785:Lactose