FIG. 1.

Genetic relationships among 62 V. vulnificus strains, 1 L. anguillarum strain, and 1 V. diazotrophicus strain, based on allelic variations at 15 enzyme loci. The dendrogram was generated by using the average-linkage method of clustering and a matrix of pairwise coefficients of genetic distance. •, V. vulnificus indole-negative strains isolated from diseased eels; ▪, V. vulnificus indole-negative strains not isolated from diseased eels; ▴, V. vulnificus indole-positive strains isolated from diseased eels.