… Should such mutants be included as ESBLs, on the basis of having an extended spectrum
as compared with their parent AmpC types? I would say ‘yes’, although a show of hands at the …

… For the purpose of this review, the term ESBL will be taken to mean those β-lactamases of
Bush-Jacoby-Medeiros group 2be and those of group 2d which share most of the fundamental …

… was production of extended spectrum β-lactamases (ESBLs).The ESBL enzymes are plasmid
- mediated enzymes capable of hydrolyzing and inactivating a wide variety of β lactams, …

… The plasmid-encoded extendedspectrum -lactamase (ESBL) enzymes represent such a
resistance phenomenon that is difficult to recognize (8, 9, 13, 17, 22, 23, 27, 30). …

… , Jacoby and Medeiros, ESBLs are located in two … (extended-spectrum β-lactamases;
Ambler's class A enzymes) and 2d (cloxacillin-hydrolyzing β-lactamases; Ambler's class D ESBLs) […

… [2,3] Because of their spectrum of activity against oxyimino-cephalosporins, these enzymes
became known as extended spectrum β-lactamases (ESBLs). Currently, over 150 ESBLs …

Background: Since the initial appearance in the 1980s, Enterobacteriaceae producing
extended-spectrum β-lactamase (ESBL) have increased in prevalence and emerged as a major …

… Because the enzyme was active against the expandedspectrum b-lactam … “extendedspectrum
b-lactamases” (ESBLs). To date, there are 1130 TEM-type and 150 SHV-type b-lactamases…

… The extended-spectrum β-lactamases (ESBLs) are classified in … -β-lactam at a rate ≥10%
of that for benzylpenicillin along with inhibition by clavulanic acid.1, 2 The presence of ESBLs …

… Extended-spectrum β-lactamase (ESBL)-producing Gram-… of resistance to expanded-spectrum
β-lactam antibiotics. Since … -type ESBLs were the predominant families of ESBLs. Today …