Compared to B. melitensis 16M, strain IMHB1 contained CbiM, ArgT, and HisJ in the ABC transporter pathway; PcaF in benzoate degradation; and LepB in the legionellosis pathway, while lacking BioM in the ABC transporter pathway, AdeB in the beta-lactam resistance pathway, and YxdM in the two-component system pathway. The gene discussed is ABCG2; the disease is legionellosis.