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Antimicrobial Agents and Chemotherapy, January 2001, p. 309-311, Vol. 45, No. 1
0066-4804/01/$04.00+0   DOI: 10.1128/AAC.45.1.309-311.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

SHV-14, a Novel beta -Lactamase Variant in Klebsiella pneumoniae Isolates from Nijmegen, The Netherlands

Meifang Yuan,1,dagger Lucinda M. C. Hall,1 Jaa Hoogkamp-Korstanje,2 and David M. Livermore3,*

Department of Medical Microbiology, St. Bartholomew's and the Royal London School of Medicine and Dentistry, London E1 2AD,1 and Antibiotic Resistance Monitoring & Reference Laboratory, Central Public Health Laboratory, London NW9 5HT,3 United Kingdom, and Department of Medical Microbiology, University Hospital St. Radboud, Nijmegen, The Netherlands2

Received 11 April 2000/Returned for modification 11 August 2000/Accepted 6 October 2000

Four ceftazidime-resistant isolates of a Klebsiella pneumoniae strain were collected from intensive care unit patients in Nijmegen, The Netherlands. These isolates had TEM-29 and SHV-14 beta -lactamases. SHV-14 is a novel variant, with two substitutions compared with the sequence of SHV-1: Ile8Phe and Arg43Ser. Its gene also had a silent Cright-arrowT mutation at nucleotide 481. The SHV-14 enzyme had slightly higher Vmax rates than SHV-1 for oxyimino-aminothiazolyl cephalosporins, but this activity was insufficient for the enzyme to count as an extended-spectrum beta -lactamase.

* Corresponding author. Mailing address: Antibiotic Resistance Monitoring and Reference Laboratory, Central Public Health Laboratory, 61 Colindale Ave., London NW9 5HT, United Kingdom. Phone: 0208-200-4400, ext. 4223. Fax: 0208-358 3292. E-mail: DLivermore{at}phls.nhs.uk.

dagger Present address: Molecular Genetics and Oncology Group, Department of Clinical Dental Sciences, The University of Liverpool, Liverpool L69 3BX, United Kingdom.

Antimicrobial Agents and Chemotherapy, January 2001, p. 309-311, Vol. 45, No. 1
0066-4804/01/$04.00+0   DOI: 10.1128/AAC.45.1.309-311.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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