Fig. 1

Scatter diagram of relative abundance of 7194 orthologs found in 2527 decoded bacterial genomes. The horizontal axis represents the percentage of nonpathogenic strains presenting the ortholog (Anp) whereas the vertical axis represents the corresponding percentage in pathogenic strain subpopulation (Ap). The pathogen-abundant (PA > 4) and nonpathogen-abundant orthologs (PA < 0.25) were marked in red and green, respectively. Note that PA = Ap/Anp