Figure 2.

Distribution and pairwise associations of virulence genes in S. aureus isolates. (A) Distribution of genes encoding different types of virulence factors in S. aureus isolated from the clinical sector (white), food industry (black), and mastitis (grey). Data represents the average and standard deviation. (B) Pairwise associations of selected virulence genes, computed using phi coefficients (cut-off 0.7), with a colour gradient representing the type of association. The intensity of the colour and the size of the circle indicate the strength of the association.