نتایج جستجو برای: blaz
تعداد نتایج: 128 فیلتر نتایج به سال:
The study aimed to investigate the phenotypic and genotypic identification of in vitro antimicrobial susceptibility of 21 Staphylococci (10 Staphylococcus aureus and 11 Coagulase Negative Staphylococci) isolated from bovine mastitis to 12 antimicrobial drugs frequently using in veterinary medicine in Algeria. Isolates of staphylococci from bovine mastitis were tested for antibiotics with disc-d...
INTRODUCTION Bovine mastitis is a frequent cause of economic loss in dairy herds. Coagulase-negative staphylococci (CoNS) are increasing in importance as causeof bovine intramammary infection (IMI) throughout the world in recent years. CoNShave been isolated from milk samples collected from cows with clinical andsubclinical mastitis in several countries. Identification of mastitis pathogensis i...
We encountered three clinical isolates of methicillin-resistant Staphylococcus aureus which were susceptible to netilmicin and arbekacin in the absence of beta-lactam antibiotics but which were resistant to them in the presence of beta-lactam antibiotics. One of these strains, KU5801, was used to further investigate the antagonism between aminoglycosides and beta-lactam antibiotics. beta-Lactam...
Staphylococcus aureus and Staphylococcus saprophyticus are the most common and most important staphylococcal species associated with urinary tract infections. The objective of the present study was to compare and to evaluate the accuracy of four phenotypic methods for the detection of beta-lactamase production in Staphylococcus spp. Seventy-three strains produced a halo with a diameter ≤28mm (p...
NorA, a multidrug efflux pump in Staphylococcus aureus, protects the cell from multiple drugs, including quinolones. The flqB mutation (T-->G) in the 5' untranslated region upstream of norA causes norA overexpression of 4.9-fold in cis, as measured in norA::blaZ fusions. The transcriptional initiation site of norA was unchanged in mutant and wild-type strains, but the half-life of norA mRNA was...
Recently, a novel variant of mecA known as mecC (mecA(LGA251)) was identified in Staphylococcus aureus isolates from both humans and animals. In this study, we identified a Staphylococcus xylosus isolate that harbors a new allotype of the mecC gene, mecC1. Whole-genome sequencing revealed that mecC1 forms part of a class E mec complex (mecI-mecR1-mecC1-blaZ) located at the orfX locus as part of...
Ammar Al-Chalabi, Peter M. Andersen, Siddharthan Chandran, Adriano Chio, Philippe Corcia, Philippe Couratier, Olof Danielsson, Mamede de Carvalho, Claude Desnuelle, Torsten Grehl, Julian Grosskreutz, Trygve Holmøy, Caroline Ingre, Merete Karlsborg, Grethe Kleveland, Jan Christoph Koch, Blaz Koritnik, Magdalena KuzmaKozakiewicz, Hannu Laaksovirta, Albert Ludolph, Christopher McDermott, Thomas Me...
شیوع مقاومت چندگانه در انتروکوکوس فاسیوم جداشده از بیماران و محیط بیمارستانهای منتخب استان لرستان
زمینه و هدف: بـا افـزایش استفاده از آنتیبیوتیک ونکومایسین، انتروکوک مقاوم به ونکومایسین، بهعنوان یک عامل مهم عفونتهای بیمارستانی مطرح است. در ایـن مطالعـه بـه بررسـی الگـوی مقاومـت آنتیبیوتیکی و فراوانی انتروکوک فاسیوم مقاوم به ونکومایسین پرداخته شد. روش بررسی:در این مطالعه توصیفی، پس از جداسازی و تشخیص 690 سویه انتروکوکوس از نمونههای بـالینی و محیطی بخشهای مختلف بیمارستانهای لرستان، الگ...
Introduction: Resistance to penicillin among Staphylococcus aureus species is very widespread. One of the most important resistance mechanisms toward penicillin in S. aureus is blaZ production. Detection of beta lactamase production is possible using different methods like disk diffusion, iodometric, acidometric and molecular (PCR) methods. The aim of this study was to detection of beta lactama...
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