The American Chemical Society has reported that scientists are developing the first test for instantly detecting beef that has been contaminated with tissue from a cow's brain or spinal cord during slaughter - an advance in protecting against possible spread of the human form of bovine spongiform encephalopathy. The study was scheduled to appear in the Aug. 13 issue of ACS' bi-weekly Journal of Agricultural & Food Chemistry.
Jürgen A. Richt and colleagues from the U.S. Department of Agriculture's National Animal Disease Center and Iowa State University pointed out that removal of brain, spinal and other central nervous tissue after slaughter is "one of the highest priority tasks to avoid contamination of the human food chain with BSE. No currently available method enables the real-time detection of possible central nervous system tissue contamination on carcasses during slaughter."
They describe a test based on detection of the fluorescent pigment lipofuscin, a substance that appears in high concentrations in the nervous tissue of cattle. The researchers found that it was a dependable indicator for the presence of brain and spinal tissue in bovine carcasses and meat cuts. "Small quantities of bovine spinal cord were reliably detected in the presence of raw bovine skeletal muscle, fat and vertebrae. The research lays the foundation for development of a prototype device allowing real-time monitoring of CNS tissue contamination on bovine carcasses and meat cuts," the report said.