Phylogenetic analysis using the maximum likelihood method based on sequences from the calmodulin-encoding gene. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) is shown next to the branches (NJ/ML). The evolutionary distances were computed using the Tamura 3-parameter method (T92 + I). All positions containing gaps and missing data were eliminated. Further information about isolate source and GenBank accession number can be found in the Additional file 1.