Fig. 1From: Chlortetracycline and florfenicol induce expression of genes associated with pathogenicity in multidrug-resistant Salmonella enterica serovar TyphimuriumPrincipal component analysis (PCA) plot of the regularized log-transformed counts for each MDR S. Typhimurium strain following exposure to a chlortetracycline or b florfenicol. The percentages of variation explained by each component is displayed on the axesBack to article page