… coli) of the 16 AmpC producers. We also describe a three-… isolates that harbor AmpC
beta-lactamase. Of the 45 cefoxitin-… 16 AmpC producers and 28 of 29 (97%) isolates as non-AmpC …

… 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 (…

… -lactamase families have also recently emerged, such as plasmid-mediated AmpC β-lactamases …
prevalent β-lactamase families, including ESBLs, carbapenemases, plasmid-mediated …

The bla ESBL and bla AmpC genes in Enterobacteriaceae are spread by plasmid-mediated
integrons, insertion sequences, and transposons, some of which are homologous in …

… bla AmpC genes, such as E. coli, K. pneumoniae, and P. … that various types of AmpC β-lactamases
were found in … have shown that AmpC β-lactamase production in Enterobacteriaceae …

… However, because the region around serine-80 of the ampC f3-lactamase … ampC
cephalosporinase as well as related cephalosporinases form a distinct group of serine P-lactamases …

… Further global increase of prevalence and diversity of plasmidic AmpC A-lactamases …
AmpC Z-lactamases. Since the late 1980s, the number of plasmid-encoded AmpC 6-lactamases …

… It is also not unusual to find a single isolate that expresses multiple βlactamase enzymes,
further complicating the treatment options. Thus the present study was designed to investigate …

… A number of Gram-positive and Gram-negative species express p-lactamases that are
inducible by (J-lactam antibiotics. We have previously described the inducible ampC (3-lactamase …

… AmpC beta-lactamase-producing E. coli strains (>90%), including those producing
plasmid-mediated AmpC beta-lactamases and chromosomal AmpC … tool when AmpC production …