Fig. 1

Inter- and intra-specific conjugative frequency of IncI2 plasmid in the absence of antibiotic selective pressure. Conjugative frequency for E. coli donor and (A) E. coli recipient (B) Salmonella recipient and (C) K. pneumoniae recipient (D) Comparison of conjugative frequency of IncI2 plasmid. (ns P > 0.05; * P < 0.05; ** P < 0.01; *** P < 0.001; **** P < 0.0001)