CTX-M-14 β-lactamase-producing Citrobacter freundii isolated in Venezuela

CTX-M-14 type beta-lactamase producing Salmonella enterica serovar enteritidis isolated from imported chicken meat.

First Detection of VIM-4 Metallo-β-Lactamase-Producing Citrobacter freundii in China

Dear Sir, Carbapenems are one of the most critically important antimicrobials and are considered as last-choice drugs in clinical settings. However, the emergence and dissemination of Enterobacteriaceae carrying acquired metallo-β-lactamases (MBLs) is being increasingly reported throughout the world, presenting a serious threat to the effectiveness of carbapenem treatment [1]. Acquired MBLs, su...

Identification of ACT-1 Plasmid-Mediated AmpC β-Lactamase Producing Citrobacter freundii from a Chinese Patient

Dear Sir, Enterobacteriaceae, other than Escherichia spp. and Klebsiella spp., can cause serious nosocomial infections and appear to have become increasingly drug resistant. Citrobacter freundii, belonging to the Enterobacteriaceae family, is a prominent opportunistic pathogen responsible for serious infections in immunocompromised individuals. C. freundii is characterized by the presence of ch...

CTX-M-Type Extended-Spectrum β-Lactamase-Producing Klebsiella pneumoniae Isolated from Cases of Bovine Mastitis in Japan

Three Klebsiella pneumoniae isolates producing extended-spectrum beta-lactamase (ESBL) were obtained from three dairy cows with clinical mastitis in two farms in western Japan. Two of the 3 isolates from cows in different farms were able to transfer plasmids carrying the blaCTX-M-2 gene to Escherichia coli recipient. Pulsed-field gel electrophoresis (PFGE) patterns of the 2 isolates were differ...

A novel CTX-M beta-lactamase (CTX-M-8) in cefotaxime-resistant Enterobacteriaceae isolated in Brazil.

To estimate the diversity of extended-spectrum beta-lactamases in Brazil, 18 strains from different species of the family Enterobacteriaceae exhibiting a positive double-disk synergy test were collected by a clinical laboratory from several hospitals in Rio de Janeiro, Brazil, in 1996 and 1997. Four strains (Proteus mirabilis, Enterobacter cloacae, Enterobacter aerogenes, and Citrobacter amalon...