TABLE 1.

Strains and transformants used in this study

StrainOriginβ-Lactamase contentReference
A. baumannii FERClinical strainOXA-23 and AmpCThis study
A. baumannii CLA-1Clinical strainOXA-40 and AmpC15
A. baumannii MADClinical strainOXA-58 and AmpC26
E. coli DH10BaReference strainAmpC (E. coli)15
A. baumannii CIP 70.10Reference strainAmpC20
A. baumannii BM4547Reference strainAmpC20
E. coli DH10B(pOXA-23)TransformantOXA-23This study
E. coli DH10B(pOXA-40)TransformantOXA-40This study
E. coli DH10B(pOXA-58)TransformantOXA-58This study
A. baumannii CIP 70.10(pOXA-23)TransformantOXA-23 and AmpCThis study
A. baumannii CIP 70.10(pOXA-40)TransformantOXA-40 and AmpCThis study
A. baumannii CIP 70.10(pOXA-58)TransformantOXA-58 and AmpCThis study
A. baumannii BM4547(pOXA-23)TransformantOXA-23 and AmpCThis study
A. baumannii BM4547(pOXA-40)TransformantOXA-40 and AmpCThis study
A. baumannii BM4547(pOXA-58)TransformantOXA-58 and AmpCThis study
A. baumannii CIP 70.10(pFER)TransformantOXA-23 and AmpCThis study
A. baumannii CIP70.10(pMAD)TransformantOXA-58 and AmpC26
A. baumannii BM4547(pFER)TransformantOXA-23 and AmpCThis study
A. baumannii BM4547(pMAD)TransformantOXA-58 and AmpCThis study
A. baumannii CLA-1 (ΔOXA-40)Recombinant strainAmpCThis study
  • a As usual in E. coli, its naturally occurring ampC gene is not expressed.