Enrichment and DNA extraction protocols for the simultaneous detection of Salmonella and Listeria monocytogenes in raw sausage meat with multiplex real-time PCR
2004
Wang, X. | Jothikumar, N. | Griffiths, M.W.
A novel method of DNA extraction and purification was developed and was used in conjunction with a multiplex real-time PCR assay for the simultaneous detection of Salmonella and Listeria monocytogenes in a raw meat sample. The PCR used primers targeting the invA gene of Salmonella and the hlyA gene of L. monocytogenes, and PCR products were detected with a LightCycler on the basis of fluorescence from SYBR Green and melting temperature. The assay allowed the detection of 3 Listeria cells and 4 Salmonella cells per g of the original sausage within 10 h, including an enrichment period of 6 to 8 h.
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