date:Aug 22, 2012
a sample from a food contact surface or product.
The sample is placed in an enrichment broth and incubated to increase the presence of a food pathogen, in this case listeria.
After about 16 hours, the enriched sample is then chemically lysed (split up) to release the RNA of the listeria (DNA for Salmonella).
Using a second chemical, the RNA is converted to DNA which is then rapidly and exponentially amplified to a level which triggers a fluorescent reaction which is then detected by our instr