EXPERIMENTAL COLONIZATION OF THE BOVINE TEAT DUCT WITH CORYNEBACTERIUM-BOVIS AND THE EFFECT ON MILK SOMATIC-CELL COUNTS

  • 1 January 1984
    • journal article
    • research article
    • Vol. 48  (2) , 141-145
Abstract
Colonization with C. 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 .times. 104 colony-forming units (CFU) of the organism into the teat cistern, 4.7 .times. 103 CFU 5 mm into the teat duct or by exposure of the teat orifice to a milk culture containing 1.6 .times. 107 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).