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Volume 10, Number 6—June 2004
Letter

CTX-M and Plasmid-mediated AmpC-Producing Enterobacteriaceae, Singapore

Tse Hsien Koh*Comments to Author , Grace Chee Yeng Wang*, Li-Hwei Sng*, Zhao Yi*, and Tse Yuen Koh†
Author affiliations: *Singapore General Hospital, Singapore; †Ngee Ann Polytechnic, Singapore

Main Article

Table

Characteristics of isolates containing CTX-M and plasmid-mediated AmpC β-lactamases

Isolate Species MIC (μg/mL)a
pIb Sequenced β-lactamase
CAZ FEP CRO AZT
EU17113
K. pneumoniae
4
4
128
2
7.2, 7.5, 8.0
CTX-M-9 type
EU2673
K. pneumoniae
128
128
>256
>256
5.8, 7.2, 7.5, 9.0
CTX-M-15 type
EU2657
E. coli
16
128
>256
64
5.1, 6.3, 7.2, 7.5, 8.0
CTX-M-2 type
EU4855
E. coli
>256
4
>256
64
8.8
CMY-2 type
EB9505 E. coli 128 1 256 8 5.1, 8.8 CMY-2 type

aK. pneumoniae, Klebsiella pneumoniae; E. coli, Escherichia coli; CAZ, ceftazidime; FEP, cefepime; CRO, ceftriaxone; AZT, aztreonam.
bIsoelectric points of β-lactamases.

Main Article

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Page updated: February 22, 2011
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The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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