Escherichia coli mastitis was first reproduced in 1903 by sticking the organism to teat orifices. E coli is very common in the environment of housed dairy cows and mastitis can easily be reproduced experimentally by the introduction of as few as 20 organisms into the teat cistern via the teat duct. It is generally accepted that this is the route of natural infection but the processes by which the organisms traverse the teat duct remain unclear. The literature is reviewed and the facts and hypotheses are considered.
- British Veterinary Association. All rights reserved.
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