… The first bacterial enzyme reported to destroy penicillin was the AmpC β-lactamase of …
resistance was then designated ampC. ampA strains overproduced β-lactamase, suggesting a …

… to distinguish between ESBL and plasmid-encoded AmpC β-lactamase producers do we
run the risk of the emergence of extended-spectrum AmpC β-lactamases (ESACs)?31 With that …

… β-lactamases (ESBLs), AmpC β-lactamases (AmpC-BL), Klebsiella pneumoniae carbapenemases
(KPC), and the metallo-β-lactamases (… due to carbapenemases and AmpC-BL using …

… AmpC production and β-lactam resistance, even for infections caused by initially susceptible
isolates. The risk of inducing AmpC production varies by β-lactam and … AmpC β-lactamase–…

… Resistance to third-generation cephalosporins is typical of MDRs, being mainly due to
the production of extended spectrum β-lactamases or AmpC-type β-lactamases. …

The predominant mechanism for resistance to-lactam antibiotics in gram-negative bacteria is
the synthesis of-lactamase. To meet this challenge,-lactams with greater-lactamase stability…

… screen for plasmid-mediated AmpC β-lactamases (28). Alternatively, … AmpC β-lactamases,
plasmid-mediated AmpC β-lactamases are most accurately detected with the multiplex AmpC …

… β-lactams to the original substrates has allowed resistance to develop further. Broad-spectrum
β-lactamases, such as the class C β-lactamase AmpC, … class A β-lactamases, leading to …

… To date, all plasmidmediated AmpC beta-lactamases have … Both ESBLs and plasmid-mediated
AmpC beta-lactamases are … for ESBLs in the presence of an AmpC beta-lactamase. …

… -mediated AmpC β-lactamases in isolates that lack a chromosomally encoded AmpC β-lactamase. …
gene but only produces an insignificant amount of AmpC β-lactamase) were used. …