Prevalence of extended-spectrum beta-lactamases in isolates of the Enterobacter cloacae complex from German hospitals

Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases
H HoffmannA Roggenkamp

Abstract

In 2002, 119 isolates of the Enterobacter cloacae complex were collected randomly from 11 German laboratories nationwide. Antibiotic susceptibilities were tested by disk-diffusion tests according to CLSI guidelines, and MICs were determined using Etests. PCRs were performed to amplify all TEM and SHV, and most CTX-M and OXA beta-lactamase genes. PCR products were sequenced to identify the precise extended spectrum beta-lactamase (ESBL) types. Isoelectric focusing (IEF) and PM/PML Etests were used to confirm production of the respective ESBLs. According to susceptibility tests and CLSI criteria, 49 (40%) isolates were resistant to extended-spectrum cephalosporins. Seven (5.8%) isolates were positive in at least one of the PCR assays. Sequencing identified production of TEM-1 beta-lactamase genes by three (2.9%) isolates, and ESBL genes of the CTX-M and SHV beta-lactamase families by five (4.2%) isolates. IEF confirmed the production of beta-lactamases in the expected pI ranges of the respective ESBLs, and four of the five ESBL-producers were detected using the PM/PML Etest. All ESBL-producing isolates showed co-resistance to sulphonamides.

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Citations

May 4, 2010·Journal of Microbiology, Immunology, and Infection = Wei Mian Yu Gan Ran Za Zhi·Po-An SuWen-Liang Yu
Aug 7, 2010·Journal of Microbiology, Immunology, and Infection = Wei Mian Yu Gan Ran Za Zhi·Kuan-Hung LinWen-Liang Yu
Dec 31, 2010·Microbial Drug Resistance : MDR : Mechanisms, Epidemiology, and Disease·Sophia MüllerGiuseppe Valenza
Jul 4, 2015·Enfermedades infecciosas y microbiología clínica·Rubén Tato-RodríguezMarta García-Campello
Feb 24, 2015·World Journal of Microbiology & Biotechnology·Sui Sheng T HuaSiov Bouy L Sarreal

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