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The effect of subclinical Staphylococcus epidermidis infection of the lactating bovine udder on its susceptibility to infection with Streptococcus agalactiae or Escherichia coli



The effect of subclinical Staphylococcus epidermidis infection of the lactating bovine udder on its susceptibility to infection with Streptococcus agalactiae or Escherichia coli



British Veterinary Journal 134(2): 146-151



Using a within-cow experimental design the susceptibility of uninfected or S. epidermidis infected udder quarters to challenge with E. coli or S. agalactiae was measured. Twenty-one S. epidermidis infected quarters were challenged by infusion of E. coli into the teat sinus and 13 (61.9%) became infected. Fourteen of 15 uninfected quarters challenged similarly with E. coli became infected (93.3%). When another 20 quarters were challenged with S. agalactiae, 1 of 9 S. epidermidis infected quarters (11.1%) and 10 of 11 uninfected quarters became infected. The increased resistance to infection following S. epidermidis infection may be due to the raised polymorphonuclear leukocyte content of the milk in these quarters rather than any direct inhibition produced by the S. epidermidis. The significance of these findings in terms of mastitis control is discussed.

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Accession: 006655469

Download citation: RISBibTeXText

PMID: 343882

DOI: 10.1016/s0007-1935(17)33538-8


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