نتایج جستجو برای: ampc

تعداد نتایج: 1706  

مطوایی , علیرضا, نیاکان , محمد, چیت ساز , محسن,

زمینه و اهداف: مواد ضدمیکروبی بتالاکتام در حال حاضر رایج ترین درمان برای عفونت های باکتریایی می باشند. استفاده از آنها منجر به بروز مقاومت باکتری های گرم منفی در برابر آنتی بیوتیک های بتالاکتام در سراسر جهان می شود. آنزیم های بتالاکتاماز وسیع الطیف (ESBLs) آنتی بیوتیک های بتالاکتام را هیدرولیز و غیرفعال می کنند. آنزیم های AmpC در کلاس C طبقه بندی ESBLs جای دارند. آنزیم های AmpC تیپیک که سفالوس...

Journal: :Indian journal of medical microbiology 2005
S Singhal T Mathur S Khan D J Upadhyay S Chugh R Gaind A Rattan

The purpose of this study was to simultaneously screen for Extended-spectrum beta-lactamases (ESBL) and AmpC beta-lactamases in gram negative clinical isolates from four tertiary care hospitals and further to compare two detection methods three-dimensional extraction method and AmpC disk test for AmpC beta-lactamases. A total of 272 isolates were screened for ESBL and AmpC beta-lactamase by mod...

Journal: :Journal of Clinical Medicine 2023

Aim: This was a prospective, multicenter, single-arm intervention, against historical controls, study of the efficacy vonoprazan-based 7-day triple regimen with metronidazole (VPZ-AMPC-MNZ) as first-line therapy for eradicating clarithromycin-resistant Helicobacter pylori (H. pylori). Methods: We enrolled 35 patients positive H. pylori, assessed by culture, without history eradication. These we...

2013
Christine Miossec Monique Claudon Premavathy Levasseur Michael T Black

Induction of ampC β-lactamase expression can often compromise antibiotic treatment and is triggered by several β-lactams (such as cefoxitin and imipenem) and by the β-lactamase inhibitor clavulanic acid. The novel β-lactamase inhibitor avibactam (NXL104) is a potent inhibitor of both class A and class C enzymes. The potential of avibactam for induction of ampC expression in Enterobacter cloacae...

2016
MAANASA BHASKAR JHARNA MANDAL

Routine detection of AmpC beta lactamases in Escherichia coli is cumbersome. This study was performed to determine the usefulness of a modified disc diffusion test to detect AmpC beta lactamases in E.coli. 28 non-repetitive, cefoxitin resistant isolates of E.coli were collected from cases of urinary tract infections and screened phenotypically for ESBLs and AmpC beta lactamase using DDST (cefta...

2011
Miroslava Htoutou Sedlakova Vojtech Hanulik Magdalena Chroma Kristyna Hricova Milan Kolar Tomas Latal Reiner Schaumann Arne C. Rodloff

BACKGROUND Enterobacteriaceae producing ESBL and AmpC enzymes can be associated with failure of antibiotic therapy and related morbidity and mortality. Their routine detection in microbiology laboratories is still a problem. The aim of this study was to compare the sensitivity of selected phenotypic methods. MATERIAL/METHODS A total of 106 strains of the Enterobacteriaceae family were tested,...

Journal: :Journal of clinical microbiology 2003
Philip E Coudron Nancy D Hanson Michael W Climo

We tested 190 Klebsiella pneumoniae bloodstream isolates recovered from 189 patients in 30 U.S. hospitals in 23 states to determine the occurrence of extended-spectrum beta-lactamase (ESBL) and AmpC beta-lactamase producers. Based on growth inhibition by clavulanic acid by disk and MIC test methods, 18 (9.5%) of the isolates produced ESBLs. Although the disk diffusion method with standard break...

2014
Mona Wassef Iman Behiry Mariam Younan Nancy El Guindy Sally Mostafa Emad Abada

BACKGROUND AmpC type β-lactamases are commonly isolated from extended-spectrum Cephalosporin-resistant Gram-negative bacteria. Also, resistance appeared in bacterial species not naturally producing AmpC enzymes. Therefore, a standard test for the detection of the plasmid-mediated AmpC enzyme and new breakpoints for extended spectrum Cephalosporins are urgently necessary. OBJECTIVES To detect ...

Journal: :Journal of clinical and diagnostic research : JCDR 2015
Leila Azimi Gholamreza Erajiyan Malihe Talebi Parviz Owlia Mahsa Bina Ali Shojaie Abdolaziz Rastegar Lari

INTRODUCTION Klebsiella pneumoniae is one of the main opportunistic pathogens which can cause different types of infections. Production of beta-lactamases like AmpC and ESBL mostly lead to beta-lactam resistance in these Gram-Negative bacteria. The aim of this study was the detection of AmpC-producing K. pneumoniae in clinical isolates. MATERIALS AND METHODS Three hundred and three isolates o...

Journal: :Journal of clinical microbiology 2000
P E Coudron E S Moland K S Thomson

AmpC beta-lactamases are cephalosporinases that confer resistance to a wide variety of beta-lactam drugs and that may thereby create serious therapeutic problems. Although reported with increasing frequency, the true rate of occurrence of AmpC beta-lactamases in Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis remains unknown. We tested a total of 1,286 consecutive, nonrepeat isol...

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