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Use of bovine single nucleotide polymorphism markers to verify sample tracking in beef processing
Michael P Heaton1, James E Keen, Michael L Clawson
1USDA, Agricultural Research Service, US Meat Animal Research Center, State Spur 18D, PO Box 166, Clay Center, NE 68933-0166, USA.
Journal of the American Veterinary Medical Association
|April 23, 2005
Summary
A panel of 20 bovine single nucleotide polymorphism (SNP) markers accurately verifies sample tracking in slaughterhouses. This DNA-based method enhances food safety by confirming sample identity for traceback programs.
Area of Science:
- Animal genetics
- Food safety science
- Biotechnology
Background:
- Accurate sample tracking is crucial in meat processing for food safety and traceback.
- Current methods may be insufficient for high-throughput verification in commercial slaughter facilities.
Purpose of the Study:
- To evaluate a set of 20 single nucleotide polymorphism (SNP) markers for verifying sample tracking accuracy.
- To assess the utility of these markers in a commercial slaughter plant processing dairy cows.
Main Methods:
- A prospective, blinded validation study was conducted.
- Blood and liver samples were collected from 168 cattle (cows and bulls).
- Genotype profiles were obtained using 20 bovine SNP markers.
Main Results:
- The 20 SNP markers had a very low probability of coincidental genotype matches (1 in 23 million).
- 90.5% of purported blood-liver sample pairs were correctly matched.
- 16.5% of sample pairs showed mismatches, indicating potential tracking errors.
Conclusions:
- The selected 20 bovine SNP markers are highly informative for verifying sample tracking in slaughter plants.
- These markers can support high-throughput, DNA-based traceback programs.
- This technology can improve detection of drug residues, disease control, and overall food safety.