Which comes first, chicken or egg safety?

In September 2004, officials at the Food and Drug Administration proposed measures for reducing the risks of Salmonella enteritidis contamination of hen eggs, improving their safety in the food supply. Recommendations for large-scale egg producers included the establishment of biosecurity, record-keeping, and pest and rodent control programs. At Purdue University in West Lafayette, Indiana, food scientists announced progress toward designing a biosensor for detecting the foodborne pathogen Listeria monocytogenes in prepared meats.