Field trial to determine efficacy of an Escherichia coli J5 mastitis vaccine.

@article{Hogan1992FieldTT,
  title={Field trial to determine efficacy of an Escherichia coli J5 mastitis vaccine.},
  author={Joe S. Hogan and Kacey L. Smith and Dr. John A. Todhunter and P S Schoenberger},
  journal={Journal of dairy science},
  year={1992},
  volume={75 1},
  pages={78-84}
}
Efficacy of an Escherichia coli (O111:B4) J5 bacterin for preventing naturally occurring IMI and clinical mastitis was tested in a 2.5-yr field trial in a 225-cow commercial herd. Cows with odd-numbered identification were vaccinated, and cows with even-numbered identification served as unvaccinated controls for each lactation during the study. Immunizations were subcutaneous on the upper part of the rib cage just posterior to the scapula at drying off, 30 d after drying off, and at calving… CONTINUE READING

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