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Standard curves of PMA-qPCR for the quantification of viable Salmonella enterica in four types of teas. (A) Black tea. (B) Green tea. (C) Peppermint tea. (D) Chamomile tea. The standard curves were generated from 10-fold dilutions of viable Salmonella cells in the supernatant of each tea. Amplification efficiency (E) of PMA-qPCR assay for each tea matrix was calculated using equation E = [10(–1/slope) – 1] × 100%.
