EXPERIMENTAL INTRA-MAMMARY INFECTION OF THE DAIRY-COW WITH ESCHERICHIA-COLI DURING THE NONLACTATING PERIOD

  • 1 January 1981
    • journal article
    • research article
    • Vol. 42  (2) , 229-231
Abstract
The nonlactating mammary gland was experimentally inoculated with E. coli. During the 1st half of the nonlactating period, 32% of 34 inoculated glands were temporarily infected. All intramammary infections were eradicated by the cow without therapy and no signs of mastitis were observed. During the 30 days before parturition occurred, 88% of 42 inoculated glands in the cows became infected. Twentythree intramammary infections were eradicated by the cow and infection in 14 glands persisted after parturition occurred. Peracute toxic mastitis occurred in those cows with infected glands.