… They have been found around the world in nosocomial and nonnosocomial isolates,
having been most easily detected in those enterobacteria not expected to produce an AmpC β-…

… Furthermore, since the activity of ceftolozane/tazobactam against Enterobacterales with
copious AmpC enzyme is variable, and many Enterobacter spp. with de-repressed …

… In contrast, high constitutive expression of AmpC expressed from a cloned ampC gene in
the absence of B-lactam drug resulted from a glycine to glutamic acid mutation at position 102 (…

… coli, we excluded species with known chromosomal AmpC production, eg, Enterobacter
cloacae, Enterobacter aerogenes, Citrobacter freundii, Serratia marcescens, Hafnia alvei, and …

… of phenotypic methods of BlaAmpC detection in a collection of 246 Enterobacteriaceae with
a diverse range of β-lactam resistance profiles. The BlaAmpC screening methods evaluated …

… Enterobacteriaceae with specific mechanisms of resistance, such as those that produce
ESBLs, AmpC β-lactamases, … above criteria because of the β-lactamases produced but are also …

… Enterobacter spp [5]. In our cohort, 38% of Enterobacter isolates produced AmpC β-lactamases…
Studies from 1991 and 2001 reported 19% emergence of Enterobacter spp resistance to …

… Testing for plasmid-mediated AmpC β-lactamases is not widely attempted by clinical … -mediated
AmpC β-lactamases in isolates that lack a chromosomally encoded AmpC β-lactamase. …

… in different Enterobacteriaceae … Enterobacteriaceae (25). Similar to a previous survey in the
United States (26), we have shown that AmpC β-lactamase production in Enterobacteriaceae …

… focus on inducible AmpC resistance in Enterobacteriaceae. … The risk of inducing AmpC
production varies by β-lactam and … , chromosomally encoded AmpC β-lactamase–mediated …