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Detection of genes coding for extended-spectrum SHV beta-lactamases in clinical isolates by a molecular genetic method, and comparison with the E test

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Abstract

A highly sensitive and specific method, termed PCR/NheI, for the detection of genes coding for SHV extended-spectrum β-lactamases (ESBL) in clinical isolates is presented. It is based on polymerase chain reaction (PCR) amplification of thebla SHV genes, followed by restriction withNheI. Due to the glycine (position 238) (SHV-non-ESBL) → serine (position 238) (SHV-ESBL) mutation, only PCR fragments from the genes coding for SHV-ESBLs were cleaved. A commercially available test for ESBLs, the E test ESBL, identified 52% of our 29 clinical isolates carryingbla SHV-ESBL genes as ESBL producers.

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Authors and Affiliations

  1. Department of Medical Microbiology, University of Zürich, PO Box, CH-8028, Zürich, Switzerland

    M. T. Nüesch-Inderbinen, H. Hächler & F. H. Kayser

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  1. M. T. Nüesch-Inderbinen
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  2. H. Hächler
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  3. F. H. Kayser
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Nüesch-Inderbinen, M.T., Hächler, H. & Kayser, F.H. Detection of genes coding for extended-spectrum SHV beta-lactamases in clinical isolates by a molecular genetic method, and comparison with the E test. Eur. J. Clin. Microbiol. Infect. Dis. 15, 398–402 (1996). https://doi.org/10.1007/BF01690097

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