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Update on BSE case in the country
The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service confirmed April 24 the nation’s fourth case of Bovine Spongiform Encephalopathy (BSE) in an animal that was sampled for the disease at a rendering facility in central California. According to a May 18 USDA press release, this animal was never presented for slaughter for human consumption, so at no time presented a risk to the food supply, or to human health in the United States.
The USDA’s National Veterinary Services Laboratories and the World Organization for Animal Health reference laboratories in Canada and England confirmed that the index cow was positive for atypical (L-type) BSE.
Both dairies that were previously held under quarantine during the investigation have been released from those quarantines, after inventories were completed and records were reviewed.
In addition, investigation of the feed records at the index dairy premises has found no anomalies, and audits of all the feed suppliers to the index premises have shown them to be in compliance with the regulations.
The USDA Animal and Plant Health Inspection Service previously announced that it has identified two progeny of the positive cow. One progeny born to the positive cow in the last two years was stillborn; the second animal was appraised, humanely euthanized, and sampled for BSE at the National Veterinary Services Laboratories in Ames, Iowa. Test results for that animal were negative for BSE.
Of several hundred potential birth cohort cattle, the focus of the tracing is on a small number (10-12) of cattle which may still be alive and have records that might allow them to be located. The remaining potential cohorts are no longer alive or have otherwise been ruled out.
As the investigation moves toward completion, local officials from the California Department of Food and Agriculture and USDA are now in charge of the incident command.
The United States has a longstanding system of three interlocking safeguards against BSE, and third safeguard -- which led to this detection -- is the ongoing BSE surveillance program that allows USDA to detect the disease if it exists at very low levels in the U.S. cattle population.
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