Evaluation of uncertainty in quantitative real-time PCR

John L Love; Paula Scholes; Brent Gilpin; Marion Savill; Susan Lin; Laly Samuel

doi:10.1016/j.mimet.2006.04.005

Evaluation of uncertainty in quantitative real-time PCR

J Microbiol Methods. 2006 Nov;67(2):349-56. doi: 10.1016/j.mimet.2006.04.005. Epub 2006 Jun 2.

Authors

John L Love¹, Paula Scholes, Brent Gilpin, Marion Savill, Susan Lin, Laly Samuel

Affiliation

¹ Christchurch Science Centre, Institute of Environmental Science and Research Ltd., PO Box 29 181, Christchurch, New Zealand. jlove_nz@yahoo.com

PMID: 16735069
DOI: 10.1016/j.mimet.2006.04.005

Abstract

Quantitative real-time PCR is one of the newer methods for measurement of the amount of nucleic material in biological systems. However, reliable measurement requires an appropriate estimation of uncertainty and this paper has developed the uncertainty budget associated with this procedure using as an example, data from a quantitative real-time PCR method for the enumeration of Campylobacter jejuni. This uncertainty is relatively large and for instance, a measured result of 151 units of DNA would have a 95% confidence interval of +/-84 units of DNA with the main sources of uncertainty being the measurement of the threshold cycle (Ct) value, the predicted DNA content of the unknown sample from the calibration line and the molar absorbance value for DNA.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Campylobacter jejuni / chemistry
Campylobacter jejuni / genetics*
Chemistry Techniques, Analytical / methods*
Chemistry Techniques, Analytical / standards
DNA, Bacterial / analysis*
Polymerase Chain Reaction / methods*
Reproducibility of Results
Taq Polymerase / metabolism

Substances

DNA, Bacterial
Taq Polymerase