FIG 8.

Pairwise associations and histogram of virulence factors from different functional categories. (A) Pairwise associations between virulence genes of five functional categories: adherence, exoenzymes, host immune evasion, iron uptake, and toxins. The associations were computed using the phi coefficient (143). (B) Histogram shows the total numbers of associations that fall within a particular association type. Colors in both panels represent the type of association (blue for positive; red for negative). Red boxes in panel A represent examples of clusters of positive associations between different functional categories.