نتایج جستجو برای: shv

تعداد نتایج: 1082  

2013
Nasrin Bahmani Rashid Ramazanzadeh

OBJECTIVE Pseudomonas aeruginosa is one of the most important causes of nosocomial infections and can acquire resistant to many antimicrobials, including β-lactams. The aim of this study was to detect the prevalence of SHV type extended-spectrum beta-lactamase (ESBL), antimicrobial resistance patterns of the P. aeroginusa and risk factors in hospitalized patients in two teaching hospitals in Sa...

2014
Mohd Hassan Baig D. Raja Sudhakar Ponnusamy Kalaiarasan Naidu Subbarao Gulshan Wadhawa Mohtashim Lohani M Kalim A Khan Asad U. Khan

Bacterial resistance is a serious threat to human health. The production of β-lactamase, which inactivates β-lactams is most common cause of resistance to the β-lactam antibiotics. The Class A enzymes are most frequently encountered among the four β-lactamases in the clinic isolates. Mutations in class A β-lactamases play a crucial role in substrate and inhibitor specificity. SHV and TEM type a...

Journal: :The Indian journal of medical research 2010
Jyoti Sharma Meera Sharma Pallab Ray

BACKGROUND & OBJECTIVES Extended spectrum beta lactamases (ESBLs) have been observed in virtually all the species of family Enterobacteriaceae. The enzymes are predominantly plasmid mediated and are derived from broad-spectrum beta lactamase TEM-1, TEM-2 or SHV-1 by a limited number of mutations. This study was undertaken to characterize ESBL producers among Escherichia coli and Klebsiella pneu...

Journal: :The Journal of antimicrobial chemotherapy 2007
Elisabete Machado Teresa M Coque Rafael Cantón Angela Novais João Carlos Sousa Fernando Baquero Luísa Peixe

OBJECTIVES To investigate the occurrence and the diversity of Ambler class A ESBLs among Enterobacteriaceae from different Portuguese clinical settings over a 2 year period (2002-04). METHODS One hundred and nine extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae isolates from five geographically distant health institutions in Portugal were studied. ESBLs were characterized ...

Journal: :Journal of clinical microbiology 2012
Christine Lascols Meredith Hackel Andrea M Hujer Steven H Marshall Sam K Bouchillon Daryl J Hoban Stephen P Hawser Robert E Badal Robert A Bonomo

The worldwide dissemination of extended-spectrum-β-lactamase (ESBL)- and carbapenemase-producing Enterobacteriaceae is a major concern in both hospital and community settings. Rapid identification of these resistant pathogens and the genetic determinants they possess is needed to assist in clinical practice and epidemiological studies. A collection of Escherichia coli, Klebsiella pneumoniae, Kl...

2001
STEPHEN LACK Walter Tholen

A new description of the exact completion Cex/reg of a regular category C is given, using a certain topos Shv(C) of sheaves on C; the exact completion is then constructed as the closure of C in Shv(C) under finite limits and coequalizers of equivalence relations. An infinitary generalization is proved, and the classical description of the exact completion is derived.

1999
Walter Tholen

A new description of the exact completion C ex/reg of a regular category C is given, using a certain topos Shv(C) of sheaves on C; the exact completion is then constructed as the closure of C in Shv(C) under nite limits and coequalizers of equivalence relations. An innnitary generalization is proved, and the classical description of the exact completion is derived.

Journal: :Journal of clinical microbiology 2004
Seok Hoon Jeong Il Kwon Bae Jung Hun Lee Seung Ghyu Sohn Geun Ho Kang Ghil Ja Jeon Young Ho Kim Byeong Chul Jeong Sang Hee Lee

To determine the prevalence and genotypes of extended-spectrum beta-lactamases (ESBLs) among clinical isolates of Klebsiella pneumoniae and Escherichia coli, we performed antibiotic susceptibility testing, pI determination, induction testing, transconjugation, and DNA sequencing analysis. Among the 509 isolates collected from 13 university hospitals in Korea, 39.2% produced ESBLs. ESBL-producin...

Journal: :Journal of clinical microbiology 2010
Trent G Towne James S Lewis Monica Herrera Brian Wickes James H Jorgensen

One hundred four Enterobacter isolates were tested by standard CLSI disk diffusion methods for detecting extended-spectrum beta-lactamases (ESBLs) and with cefepime-clavulanate disk combinations. SHV-12 was produced by 8.7% of isolates. The cefepime-clavulanate combination provided 88% sensitivity and 91% specificity for the detection of SHV-12 ESBL.

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