Maximum likelihood phylogenetic tree of 115 V. vulnificus isolates obtained from the alignment of 7 concatenated loci. Black, biotype 1 isolates; blue, biotype 2 serovar E isolates; red, biotype 2 non-serovar E isolates; green, biotype 3 isolates; #, human isolates; §, diseased fish isolates. Branches where recombination events involving the indicated loci might have occurred are indicated by arrows. The numbers at the nodes represent the percentage values given by bootstrap analysis of 1,000 replicates.