Skip to main content
Fig. 2 | Antimicrobial Resistance & Infection Control

Fig. 2

From: Evaluation of GeneXpert PA assay compared to genomic and (semi-)quantitative culture methods for direct detection of Pseudomonas aeruginosa in endotracheal aspirates

Fig. 2

A Correlation of Ct values between the GeneXpert PA assay (horizontal-axis) and the in-house qPCR (vertical-axis). Each dot represents a sample and is plotted based on the Ct values from the in-house qPCR (y-axis) and GeneXpert PA assay (x-axis). The line shows the linear regression fit based on the formula: In-house qPCR Ct = 0.7587 × GeneXpert PA Ct + 1.821. Eleven in-house qPCR Cts and three GeneXpert PA assay Cts were not used to calculate the correlation because they were negative in the other assays. B Correlation of Ct-values of the GeneXpert PA assay (vertical-axis) and the quantitative culture log10 CFU/ml (horizontal-axis) (green) and the correlation between the in-house RT-qPCR Ct values and the quantitative culture log10 CFU/ml (purple). The lines in the corresponding colors show the linear regression based on the following formulas. For the GeneXpert PA assay: Ct = − 2.900 × log10 CFU/ml + 43.72. The in-house qPCR Ct = − 2.202 × log10 CFU/ml + 35.08

Back to article page