Introduction
The implementation of control measures for contagious mastitis pathogens has successfully reduced the prevalence of these organisms in U.S. dairy herds. However, the control of environmental pathogens remains a daunting task. Escherichia coli (E. coli) are Gram-negative bacteria, similar in structure to Klebsiella spp. E. coli mastitis is typically associated with a quick onset and often severe clinical signs.
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