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• W3092058140 abstract "Molecular methods, particularly those based on real-time PCR (qPCR), have become a popular approach to detect pathogens in food samples. This technique may take advantage of hydrolysis fluorescent probes for increased specificity. Even though suitable, this approach loses the capacity of performing result confirmation by melt curve analysis. In the current study we developed an alternative approach, combining fluorescent probes along with an intercalating dye (SYBR Green) in order to simultaneously detect, and confirm the result, of two foodborne pathogens (Salmonella spp. and E. coli O157). This new approach named double chemistry qPCR, was combined with a short pre-enrichment in order to obtain a multiplex “same-day” detection method for the selected pathogens. The evaluation of the novel method in spiked food samples (ground beef and chicken breast) obtained values of relative sensitivity, specificity and accuracy higher than 95 %, and Cohen’s kappa of 0.92, with a Limit of Detection95 below 5 cfu/ 25 g, demonstrating its reliability. In addition to this, the method was challenged by inoculating heat-stressed bacteria as well as dead ones. It was observed that it was also possible to detect stressed bacteria with an initial inoculation level below 10 cfu/ 25 g. Also, it was noticed that high initial concentration of either pathogen (higher than 104 cfu/ 25 g) was needed in order to generate false positive results due to the presence of dead bacteria, thus the method presents potential for its application in the specific detection of live microorganisms." @default.
• W3092058140 created "2020-10-15" @default.
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• W3092058140 date "2020-10-09" @default.
• W3092058140 modified "2023-09-25" @default.
• W3092058140 title "Application of Short Pre-enrichment, and Double Chemistry Real-Time PCR, Combining Fluorescent Probes and an Intercalating Dye, for Same-Day Detection and Confirmation of Salmonella spp. and Escherichia coli O157 in Ground Beef and Chicken Samples" @default.
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• W3092058140 doi "https://doi.org/10.3389/fmicb.2020.591041" @default.
• W3092058140 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7581864" @default.
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