FIG. 1.
Plasmids purified from the test and control strains. Previously sequenced plasmids present in APEC O1, APEC O2, and APEC χ7122 were used as size standards. All strains except NMEC 4 contained at least one large plasmid which correlated 100% with the presence of the RepFIB amplicon. Note that a similarly sized plasmid (∼133 kb) is carried by all APEC O18 isolates.