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Plasmid profiles of isolates representing PFGE clones from visit 1 (v1), including type 18 (lanes 2 and 4), type 13 (lane 6), type 1 (lane 9), type 8 (lane 12), type 17 (lane 15), and type 3 (lane 20), and of transconjugants (lanes 3, 5, 7, 8, 10, 11, 13, 14, 16, and 17) and transformants (lanes 21 and 22). Reference strain E. coli 39R861 contains plasmids of 98, 42, 23.9, and 4.6 MDa. Reference strain S. enterica serovar Typhimurium 29R755 is a plasmid-free strain used as a recipient.
