Diagnosis and treatment of acute mastitis in a large dairy herd.

  title={Diagnosis and treatment of acute mastitis in a large dairy herd.},
  author={Kevin L Anderson and Anthony RB Smith and Bodil Gustafsson and Susi Spahr and H L Whitmore},
  journal={Journal of the American Veterinary Medical Association},
  volume={181 7},
In a 270-cow dairy herd, milk samples from all cows with acute mastitis were cultured during a 12-month period. Of 119 isolates (from 166 quarters), 49% were gram-positive organisms, 39% were gram-negative organisms, and 12% were yeasts. Of all samples from cows with acute mastitis, 40% failed to produce colonies on culture media. Recovery of the common gram-positive pathogens, Staphylococcus aureus (11% of isolations) and Streptococcus agalactiae (1% of isolations), was rather low. However, S… CONTINUE READING