Thoroughbred racing industry officials said a report that shows 99.5% of biological samples taken from racehorses and tested by laboratories in 2010 were "clean" dispels claims that horse racing is drug-ridden.

The report, called "Drugs in Racing 2010–The Facts," was compiled by the Association of Racing Commissioners International (RCI) and released Sept. 8. The report said "salacious comments" made in stories in mainstream publications "create an undeserved negative perception" of horse racing.

A few members of Congress also have targeted horse racing because of what they perceive to be–or have been told is–a drug problem.

More than 320,000 samples were tested in 2010. The report states laboratory results indicate 99.5% of them were found to contain no foreign or prohibited substance based on existing testing protocol

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