نتایج جستجو برای: lactamase esbls
تعداد نتایج: 13285 فیلتر نتایج به سال:
Plasmid-encoded resistance to broad-spectrum cephalosporins and aztreonam is becoming a widespread phenomenon in clinical medicine. These antibiotics are inactivated by an array of different extended-spectrum beta-lactamases (ESBLs) which have evolved by point mutations of parental TEM or SHV beta-lactamases. In a previous study conducted during 1994-1995, SHV-2, SHV-2a and SHV-5 beta-lactamase...
Background and objective: Extended Spectrum Beta lactamases (ESBL) such as TEM (Temoneria) is one of the bases of antibiotic resistance in Escherichia coli isolates. The aim of this study was evaluation of TEM Extended Spectrum Beta lactamase producing E. coli, in clinical samples isolated from Zanjan hospitals, by phenotypic and PCR methods. Materials and Methods: In this cross-sectional study...
Abstract Background and purpose: Escherichia Coli is one of the most common pathogens associated with nosocomial infection. Increasing use of beta Lactam Antibiotics in treatment of bacterial infections resulted in increments of drug resistance of such bacteria that is caused due to the production of B-lactamase enzymes. The beta lactamase – producing bacteria especially E.coli which is resi...
مقدمه و هدف: ازجمله مکانیسمهای مقاومت آنتی بیوتیکی در باکتری های گرم منفی به خصوص سویه کلبسیلا پنومونیه، تولید آنزیم های بتالاکتاماز وسیع الطیف (extended –spectrum β lactamase esbls) است. ژن های کدکننده esbls معمولاً روی پلاسمید قرار گرفته اند و قابلیت انتقال به سویه های گرم منفی دیگر را نیز دارند. به دلیل اهمیت موارد فوق، شناخت الگوی مقاومت و حساسیت آن نسبت به آنتی بیوتیک های β-لاکتام هدف این م...
Resistance to oxyimino cephalosporins antibiotics in Enterobacteriaceae is primarily done by the extended spectrum β-lactamases (ESBLs). Clear identification of risk factors for ESBL-producing infections is necessary. Therefore, efficient strategies can be developed to decrease outbreak of these infections. The aim of this study was to determine the antibacterial susceptibility and ESBLs patter...
Background and purpose: Production of beta-lactamase enzymes by bacteria, especially Extended-spectrum β-lactamases (ESBLs) is one of the major problems worldwide. ESBLs are mostly located on bacterial plasmids and it is recognized that SHV, TEM, and CTX-M are prevailing among them. The aim of this study was to determine the ability to produce ESBLs genes based on molecular method among non-fer...
ß-Lactams are the most widely used antibiotics, and ß-lactamases are the greatest source of resistance to them. Colorimetric tests are good, rapid, indicators of ß-lactamase production and its contingent resistance in Haemophilus, Moraxella and Neisseria spp. They can also be applied to Gram-negative bacilli but are less useful, since the usual question is not whether a ß-lactamase is produced ...
Resistance to oxyimino cephalosporins antibiotics in Enterobacteriaceae is primarily done by the extended spectrum β-lactamases (ESBLs). Clear identification of risk factors for ESBL-producing infections is necessary. Therefore, efficient strategies can be developed to decrease outbreak of these infections. The aim of this study was to determine the antibacterial susceptibility and ESBLs patter...
Abstract Background and Objective: Acinetobacter species are opportunistic important pathogens responsible for many nosocomial infections. The purpose of this study was to determine the drug resistan pattern Acinetobacter baumannii and prevalence of ESBL producing strains in Intensive Care Unit patients in Isfahan city hospitals. Material and Methods: The study was conducted on 100 Ac...
Resistance to expanded-spectrum cephalosporins commonly develops in Enterobacter aerogenes during therapy due to selection of mutants producing high levels of the chromosomal Bush group 1 beta-lactamase. Recently, resistant strains producing plasmid-mediated extended-spectrum beta-lactamases (ESBLs) have been isolated as well. A study was designed to investigate ESBL production among 31 clinica...
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