Fig 1. Hierarchical clustering analysis of phenotypic traits of P. aeruginosa isolates.

The dendrogram is split into two main clades (A and B). The mean value for all tests are represented as black boxes, higher than average virulence factor production is indicated in yellow, and lower than average is shown in blue. PES isolates are listed in red text, OES are in blue text, and local isolates are in green text. An asterisk denotes those isolates involved in strain replacement. Values were mean-centered and scaled to unit-variance. Dendrogram was built using Cluster 3.0 that contained a hierarchical feature with the gene cluster, correlation uncentered, and centroid linkage options.