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.

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Keywords Contaminant DNA, Detection limit, E. coli, Native taq polymerase, QPCR, Uida gene
Persistent URL dx.doi.org/10.2166/wh.2013.201
Journal Journal of Water and Health
Kibbee, R, Linklater, N. (Natalie), & Örmeci, B. (2013). Eliminating false positives in a qPCR assay for the detection of the uidA gene in Escherichia coli. Journal of Water and Health, 11(3), 382–386. doi:10.2166/wh.2013.201