The Americans are providing vital reinforcements as the British government tries to shorten the time between diagnosing and slaughtering infected animals.
Scientists say speeding up that process is key to eradicating the highly contagious disease.
They join 125 foreign veterinarians already in Britain helping diagnose the virus and supervise livestock slaughters, among them 45 other Americans and others from Australia, New Zealand and several European countries. Many of the American vets were recruited by the U.S. government. France, Ireland and the Netherlands have all confirmed cases since the first one was found in Britain Feb. 20. Britain now has more than 1,000 cases. In the House of Commons, Agriculture Minister Nick Brown said the government believed it was beginning to get on top of the epidemic.