Data from in vitro competition experiments with E Data from in vitro competition experiments with E. coli MG1655 carrying the recombinant plasmids pBGS18-TEM1, pBGS18-SFO1, pBGS18-AmpR-SFO1, pBGS18-OXA10-like, pBGS18-FOX4, and pBGS18-CTX-M-32. Data from in vitro competition experiments with E. coli MG1655 carrying the recombinant plasmids pBGS18-TEM1, pBGS18-SFO1, pBGS18-AmpR-SFO1, pBGS18-OXA10-like, pBGS18-FOX4, and pBGS18-CTX-M-32. The strains expressing AmpR-SFO1, OXA10-like, and OXA24 β-lactamases showed significant fitness costs. The CI values obtained with different β-lactamases are plotted and are representative of eight different experiments, with the median CI values shown by horizontal lines. (Adapted from reference 34.) Alejandro Beceiro et al. Clin. Microbiol. Rev. 2013; doi:10.1128/CMR.00059-12