Extended-spectrum β-lactamases (ESBLs) are a rapidly evolving group of β-lactamases
which share the ability to hydrolyze third-generation cephalosporins and aztreonam yet are …

Enterobacteriaceae, especially Klebsiella spp. producing extended-spectrum β-lactamases
(ESBLs) such as SHV and TEM types, have been established since the 1980s as a major …

Clonal dissemination of extended-spectrum β-lactamases (ESBL) in 170 Escherichia coli
isolates and 70 Klebsiella pneumoniae isolates from a nationwide study of 40 Spanish …

Las infecciones del tracto urinario (ITU) son un problema frecuente en atención primaria. Se
dan principalmente en mujeres sin enfermedades de base y sin anomalías funcionales o …

Enterobacteriaceae producing extended-spectrum β-lactamases (ESBLs) typically cause
nosocomial infections. Previous surveillance in the Calgary Health Region showed that …

Since first reported in Europe in the early 1980s, extended-spectrum β-lactamases (ESBLs)
have spread worldwide. When producing these broad-spectrum plasmid-encoded enzymes …

ABSTRACT In total, 438 (1.7%) Escherichia coli and 125 (3.98%) Klebsiella pneumoniae
isolates were found to be producers of extended-spectrum β-lactamase (ESBL) during 1995 …

Escherichia coli isolates collected at our Institution from 1999 to 2003 (n= 20,258) were
studied to evaluate the production of CTX-M-type extended-spectrum β-lactamases (ESBL) …

This study determined the phylogenetic groups and virulence factors of 37 Escherichia coli
isolates producing types of CTX-M compared with those of 19 isolates producing different …

BACKGROUND: Infections caused by extended-spectrum β-lactamase (ESBL)-producing
gram-negative bacilli constitute a growing problem worldwide. At the American University of …