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Fig. 4 | BMC Microbiology

Fig. 4

From: Taxonomic position, antibiotic resistance and virulence factor production by Stenotrophomonas isolates from patients with cystic fibrosis and other chronic respiratory infections

Fig. 4

The evolutionary history of L1 ß-lactamases was inferred using the Neighbor-Joining method. One amino acid sequence per ST was included. L1a-L1d were used as reference sequences from literature (Walsh et al., 1994; Crowder et al., 1998). The optimal tree with the sum of branch length = 1.25626229 is shown. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1050 replicates) are shown next to the branches. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The analysis involved 57 amino acid sequences. There were a total of 295 positions in the final dataset. No L1 sequences were found for the ST34, STH, and STI isolates. The letter behind the strain number indicate the presumptive species (Sm = Stenotrophomonas maltophilia, Sp = S. pavani) or putative novel species (A-M) as based on the analysis of the ANIb

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