Schematic representation of the outcome of the conjugative transfer of the YU39 IncA/C plasmid-borne bla
gene to different recipient strains. On the left side is the donor strain YU39 harboring pA/C, pX1 and pColE1-like plasmids. In the middle, The first round conjugation frequencies are indicated above the black arrows along with the recipient strains involved in the different phenomena. The three different types of transconjugants observed for the first round are depicted. The pSTV and pColE1-like plasmids are shown, although they were not present in all the transconjugants. Electroporation step to DH5α for the transconjugants plasmids is represented with the grey arrows. Following are the range of the second round conjugation frequencies in the “original” and DH5α strains (see text for details).