Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 401181
Title Inaccuracy of routine susceptibility tests for detection of erythromycin resistance of Campylobacter jejuni and Campylobacter coli
Author(s) Beek, M.T.; Claas, E.C.J.; Mevius, D.J.; Pelt, W. van; Wagenaar, J.A.; Kuijper, E.J.
Source Clinical Microbiology and Infection 16 (2010)1. - ISSN 1198-743X - p. 51 - 56.
Department(s) CVI Bacteriology and Epidemiology
ID - Infectieziekten
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) helicobacter-pylori infection - length polymorphism analysis - agar dilution methods - real-time pcr - macrolide resistance - antimicrobial susceptibility - clarithromycin resistance - ribosomal-rna - subsp jejuni - stability
Abstract In The Netherlands, both an increase in and regional differences in erythromycin resistance of Campylobacter jejuni and Campylobacter coli have been reported. To determine the accuracy of routine tests for erythromycin resistance, 48 erythromycin-resistant isolates from various laboratories that participate in the Dutch surveillance of Campylobacter infections were reinvestigated. Initial susceptibility testing for erythromycin had been performed by disk diffusion in six and MIC-based methods in two laboratories. Reinvestigation was carried out using broth microdilution as a reference standard, as well as E-test and genetic resistance testing. Of 36 C. jejuni isolates reported by the initial laboratories as erythromycin-resistant, four (11%) and five (14%) were confirmed as erythromycin-resistant using broth microdilution according to CLSI and EUCAST resistance criteria, respectively. Erythromycin resistance was found in eight of 12 (67%) C. coli isolates according to both criteria. Results of E-tests were in accordance with these results in all isolates. Resistance-associated mutations in the 23S rRNA gene (A2059G and A2058T) were found in all isolates showing high-level resistance, whereas none were found in susceptible isolates. Routine determination of the erythromycin resistance of C. jejuni and C. coli shows unacceptable interlaboratory variation. In the absence of standardized protocols and interpretive criteria for disk diffusion, and while we await the development of easily applicable and reliable methods for molecular resistance testing, the use of broth microdilution remains the best method.
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