… determinants of β-lactam-resistance in E. coli clinical isolates recovered from the clinical
settings … The occurrence of multiple resistance determinants in these isolates relates to complex …

… In addition, we thank the following individuals for provision of clinical isolates of H. influenzae:
Melodie Beard, RushPresbyterian St. Luke’s Medical Center; Paul Bourbeau, Geisinger …

… The evolution of unique β-lactamases has resulted in more than 1,300 … clinical isolates.
Of these enzymes, the most deleterious β-lactamases are the extended-spectrum β-lactamases, …

… -ESBL producing isolates. Conclusively, this study suggests that the CTX-M β-lactamases
are … AmpC enzymes are distributed in clinical isolates of E. coli and Klebsiella spp. in Korea. …

… -spectrum β-lactamases (ESBLs) have been reported in clinical isolates obtained from …
and the susceptibility patterns in ESBL producing clinical isolates of Gram-negative bacilli in …

… in MDR in clinical strains; it has been found in approximately 80% of clinical isolates (the
rates reported vary from 53% to 97%) (11) but was not detected in 32 environmental isolates (12…

… Resistance to piperacillin was 10.8% in clinical isolates of Escherichia coli, while 1.3% or
fewer isolates were resistant to other β-lactams. Klebsiella spp. were more susceptible to …

… of Metallo-β-lactamase genes among some Gram-negative clinical isolates (Carbapenems …
A total of 200 samples of Gram-negative clinical isolates only susceptible and resistant to …

… /PCR-negative isolates by spectrophotometric assay showed MBL activity in most of the
isolates, suggesting involvement of other genes. The high incidence of isolates possessing MBL …

… -M types of β-lactamases in clinical isolates of E. coli and K. pneumoniae producing ESBLs.
… of MBLs, AmpC and CTX-M types of β-lactamases among clinical isolates of E. coli and K. …