In silico MLST tree. Seven housekeeping genes were extracted from Salmonella genomes. Concatenated sequences were aligned by MUSCLE. The phylogenetic trees were generated by MEGA5 using bootstrap maximum likelihood method. Each color represents a different serogroup (O antigen). The confidence value is the bootstrap value calculated by sampling with replacement from the multiple sequence alignment.
Leekitcharoenphon et al. BMC Genomics 2012 13:88 doi:10.1186/1471-2164-13-88