Newer β-lactamases such as extended-spectrum β-lactamases (ESBLs), transferable AmpC
β-lactamases, and carbapenemases are associated with laboratory testing problems of false …

Despite the discovery of novel β-lactamases such as extended-spectrum β-lactamases
(ESBLs), imported AmpC, and carbapenem-hydrolyzing β-lactamases at least a decade …

Extended-spectrum β-lactamases (ESBLs) are enzymes found in gram-negative bacilli that
mediate resistance to extended-spectrum cephalosporins and aztreonam. In 1999, the …

ABSTRACT NCCLS screening and confirmation methods for detecting extended-spectrum β-
lactamases (ESBLs) apply only to Escherichia coli and Klebsiella spp., yet ESBLs have …

ABSTRACT Escherichia coli (328 isolates), Klebsiella pneumoniae (296), Klebsiella oxytoca
(44), and Proteus mirabilis (33) isolates collected during 2012 from the nine US census …

Optimal use of microbiology laboratories is essential to combat the spread of multiply
antibiotic-resistant pathogens. This is vital for patient care, as advocated by Jarvis in …

Study Objective. To evaluate the microbiologic and clinical outcomes of patients with
extended‐spectrum β‐lactamase (ESBL)‐producing isolates over a 2‐year period. Design …

Background The temporal and longitudinal trends of β-lactamases and their associated
susceptibility patterns were analyzed for Escherichia coli and Klebsiella pneumoniae …

Extended-spectrum β-lactamases (ESBLs) are enzymes produced in some gram-negative
bacilli that mediate resistance to extended-spectrum cephalosporins and aztreonam. They …

For optimal patient care, clinical laboratories should be capable of detecting clinically
significant, novel β-lactamases produced by gram-negative pathogens. However, with over …