Fig 4. Co-occurrence networks of the unique virulence gene relationships among different levels of biofilm production.

(A) Virulence co-occurrence network of unique gene relationships among isolates forming any type of biofilm. Only significant co-occurrences with a Spearman’s rho ≥0.6 are shown. (B) Virulence co-occurrence network of unique gene relationships among isolates forming moderate/strong biofilms. Only significant co-occurrences with a Spearman’s rho ≥0.6 are shown. Nodes are color coded to represent virulotype clusters based on community partitioning analysis.