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Farm Animal Practice
Update on orf
  1. Chris Lewis

    Chris Lewis graduated from the Royal Veterinary College, London, in 1962. After a spell in mixed practice in East Anglia and the Lake District, he joined Tasman Vaccine Laboratories (UK) as veterinary adviser, progressing through the formation of Coopers and Pitman- Moore as head veterinary adviser. In 1990, he was appointed veterinary investigation officer at Shrewsbury Veterinary Investigation Centre where he has worked ever since. A pastpresident of the Sheep Veterinary Society, he owns and runs a small flock of 40 breeding ewes producing quality lamb. He gained the inaugural certificate in sheep health and production in 1987.


ORF is widespread within the national flock and a cause of major welfare and economic losses. It affects sheep of all ages, manifesting in a variety of forms according to the age group. The ever increasing movement of sheep over the past decade seems to have resulted in an increased prevalence of this condition. Other contributing factors have included a deterioration in pasture management, resulting in greater thistle populations, and the increase in acreage in set-aside land.

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