Comparison of Real-Time PCR Quantification Methods in the Identification of Poultry Species in Meat Products

摘要

Poultry meat is consumed worldwide and is prone to food fraud because of large price differences among meat from different poultry species. Precise and sensitive analytical methods are necessary to control poultry meat products. We chose species–specific sequences of the gene to develop two multiplex real-time polymerase chain reaction (real-time PCR) systems: one for chicken ( ), guinea fowl ( ), and pheasant ( ), and one for quail ( ) and turkey ( ). For each species, added meat could be detected down to 0.5 % . No cross reactions were seen. For these two real-time PCR systems, we applied three different quantification methods: (A) with relative standard curves, (B) with matrix-specific multiplication factors, and (C) with an internal DNA reference sequence to normalize and to control inhibition. All three quantification methods had reasonable recovery rates from 43% to 173%. Method B had more accepted recovery rates, i.e., in the range 70–130%, namely 83% compared to 75% for method A or C.