Abstract
Multiplex PCR (m-PCR) has the potential for more rapid detection of pathogens compared to simple PCR through the simultaneous amplification of multiple gene targets using several sets of specific primers. Here, we developed an m-PCR assay which combined dry reagent mixtures for ready-to-use simultaneous detection of Salmonella spp., Bacillus cereus, and Staphylococcus aureus. The assay did not show cross-reactivity with several common bacterial pathogens and the detection limit was 103CFU/mL for mixed genomic DNA in pure culture. Lyophilized m-PCR reagents are stable for 2months stored at 4°C and for 1month stored at 25°C. Detection sensitivities of both dry and fresh mixes were able to simultaneously detect 10CFU/mL of each pathogen in artificially inoculated samples after enrichment for 6 and 12h. Results demonstrated that this method is both sensitive and specific and can be used for rapid detection and differentiation of foodborne diseases.
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