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Statement by Chief Veterinary Medical Officer John Clifford Animal and Plant
Health Inspection Service Regarding Inconclusive BSE Test Results, March 11,
"Last night we received an inconclusive test result on a rapid BSE test from
an animal sampled as part our enhanced BSE surveillance program.
"USDA is conducting further tests at the National Veterinary Services
Laboratories (NVSL) in Ames, Iowa, using an immunohistochemistry test. In
addition, USDA's Agricultural Research Service, will also conduct a Western blot
test. The results of those tests will be released as soon as they have all been
completed, within the next four to seven days.
"This inconclusive result does not mean we have found a new case of BSE.
Inconclusive results are a normal component of most screening tests, which are
designed to be extremely sensitive so they will detect any sample that could
possibly be positive. In addition, this animal did not enter the human food
chain nor the animal feed chain.
"I want to emphasize that human and animal health in the United States are
protected by a system of interlocking safeguards and that we remain very
confident in the safety of U.S. beef. The most important of these safeguards is
the ban on specified risk materials from the food supply and the Food and Drug
Administration's feed ban. And by any measure, the incidence of BSE in this
country is extremely low. Our enhanced surveillance program is designed to
provide information about the level of prevalence of BSE in the United States,
while these interlocking safeguards continue to protect our food supply.
"We are extremely gratified that since June 2004, all sectors of the cattle
industry have cooperated in this program by submitting samples from more than
640,000 animals from the highest risk populations and more than 20,000 from
clinically normal, older animals, as part our enhanced BSE surveillance program.
To date, only one of these highest risk animals has tested positive for the
disease as part of the surveillance program."
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