Due to contaminant Escherichia coli DNA present in recombinant Taq polymerase reagents, it is not possible to reliably detect low levels of E. coli in samples using the quantitative polymerase chain reaction (qPCR) assay. Native Taq polymerase was successfully used in this study to detect five uidA gene copies (5 fg of genomic DNA) of the uidA gene.
Eliminating false positives in a qPCR assay for the detection of the uidA gene in Escherichia coli
Richard Kibbee, Natalie Linklater, Banu Örmeci; Eliminating false positives in a qPCR assay for the detection of the uidA gene in Escherichia coli. J Water Health 1 September 2013; 11 (3): 382–386. doi: https://doi.org/10.2166/wh.2013.201
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