Fig. 2

PCA and PLS-DA score plot based on culture supernatant. (a) PCA score plot and (b) PLS-DA score plot generated using MetaboAnalyst based on culture supernatant in positive mode. PLS-DA models were validated using R ² and Q ² based on leave one out cross-validation (LOOCV). Five-component model was selected as optimized model with R ² = 0.99 and Q² = 0.99. The significance of the model was demonstrated by permutation test with 2000 testing iterations using separation distance and P value <0.001 was obtained. BC, B. cepacia complex; BPS, B. pseudomallei; BT, B. thailandensis; PA, P. aeruginosa; EC, E. coli