Fig 4.

PLS-DA output from the analysis of choanal swabs from birds infected with the ts-11 vaccine strain (squares) or the ts-11-like field isolate K6216D (plus signs). Results are shown for the samples (n = 70) (samples 1 to 40 from ts-11-infected birds and samples 41 to 70 from K6216D-infected birds) and 2 latent variables, capturing 19% of the x variance and 79% of the y variance. CV sensitivity, 90%; CV specificity, 82%; CV error rate, 14%; root mean squared error in cross validation (RMSECV), 34%.