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https://www.readbyqxmd.com/read/29906589/overexpression-of-adeabc-efflux-pump-associated-with-tigecycline-resistance-in-clinical-acinetobacter-nosocomialis-isolates
#1
Ya-Sung Yang, Hsing-Yu Chen, Wei-Jane Hsu, Yu-Ching Chou, Cherng-Lih Perng, Hung-Sheng Shang, Yuan-Ting Hsiao, Jun-Ren Sun
OBJECTIVES: Tigecycline non-susceptible Acinetobacter nosocomialis (TNAN) have been discovered in clinical isolates. The resistance-nodulation-cell division (RND)-type efflux system plays a major role in tigecycline non-susceptible of Acinetobacter baumannii, but the mechanism in Acinetobacter nosocomialis remains unknown. Our aim was to analyze the contribution of efflux based tigecycline resistance in clinical A. nosocomialis isolates collected from multiple medical centers in Taiwan...
June 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29778206/occurrence-and-characterisation-of-esbl-encoding-plasmids-among-escherichia-coli-isolates-from-fresh-vegetables
#2
Christin Freitag, G B Michael, Jun Li, Kristina Kadlec, Yang Wang, Melanie Hassel, Stefan Schwarz
Extended-spectrum β-lactamase (ESBL)-producing Escherichia coli isolates have been increasingly reported in different reservoirs. The aims of this study were to investigate the presence of ESBL-producing E. coli in fresh vegetables and to characterise their ESBL gene-carrying plasmids. Among the 245 samples from vegetables investigated during 2011-2013, seven putative ESBL-producing E. coli (salad n = 2, sprouts n = 5) were found. They were subjected to ESBL phenotypic confirmatory tests, detection/sequencing of ESBL genes, antimicrobial susceptibility testing (AST), phylotyping, XbaI-macrorestriction analysis, multilocus sequence typing and transformation...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29777948/escherichia-coli-hyperepidemic-clone-st410-a-harboring-bla-ctx-m-15-isolated-from-fresh-vegetables-in-a-municipal-market-in-quito-ecuador
#3
David Ortega-Paredes, Pedro Barba, Santiago Mena-López, Nathaly Espinel, Jeannete Zurita
Dissemination of Extended spectrum β-lactamases (ESBL) Enterobacteriaceae is a major medical threat. Vegetables and fruits, which are usually consumed raw, are a very suitable pathway for the spread of these bacteria from farm-to-fork. However, limited information exists regarding resistant bacteria and epidemic clones that are disseminated in vegetables and tap water in South America. We processed a total of 90 samples in triplicate of nine typically consumed raw vegetables from a central municipal market, and tap water samples were processed from twenty-one locations in Quito, Ecuador...
April 30, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29662886/high-prevalence-of-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-among-clinical-isolates-from-cats-and-dogs-admitted-to-a-veterinary-hospital-in-switzerland
#4
Anna Lena Zogg, Sabrina Simmen, Katrin Zurfluh, Roger Stephan, Sarah N Schmitt, Magdalena Nüesch-Inderbinen
Objectives: This study aimed to identify and characterize extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae among clinical samples of companion animals. Methods: A total of 346 non-duplicate Enterobacteriaceae isolates were collected between 2012 and 2016 from diseased cats ( n  = 115) and dogs ( n  = 231). The presence of bla ESBL , PMQR genes, and the azithromycin resistance gene mph(A) was confirmed by PCR and sequencing of bla genes...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29565227/prevalence-of-extended-spectrum-beta-lactamase-and-carbapenemase-genes-in-clinical-isolates-of-escherichia-coli-in-myanmar-dominance-of-bla-ndm-5-and-emergence-of-bla-oxa-181
#5
Meiji Soe Aung, Nilar San, Win Win Maw, Thida San, Noriko Urushibara, Mitsuyo Kawaguchiya, Ayako Sumi, Nobumichi Kobayashi
The increasing trend of Escherichia coli producing extended-spectrum beta-lactamases (ESBLs) and carbapenemases is a global public health concern. In this study, prevalence and molecular characteristics of E. coli harboring ESBL and carbapenemase genes were investigated for 426 isolates derived from various clinical specimens in a teaching hospital in Yangon, Myanmar, for the 1-year period beginning January 2016. A total of 157 isolates (36.9%) were ESBL producers and harbored CTX-M-1 group genes (146 isolates; blaCTX-M-15 , blaCTX-M55 ) or CTX-M-9 group genes (11 isolates; blaCTX-M-14 , blaCTX-M-27 )...
March 22, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29519530/antimicrobial-resistance-multilocus-sequence-types-and-virulence-profiles-of-esbl-producing-and-non-esbl-producing-uropathogenic-escherichia-coli-isolated-from-cats-and-dogs-in-switzerland
#6
Anna Lena Zogg, Katrin Zurfluh, Sarah Schmitt, Magdalena Nüesch-Inderbinen, Roger Stephan
Among 64 uropathogenic Escherichia coli (UPEC) isolated from 13 cats and 51 dogs, 35 were extended-spectrum beta-lactamase (ESBL) producers, and 29 were non-ESBL producers. Forty-six (71.9%) of the isolates were multidrug resistant (MDR). Among the ESBL producers, blaCTX-M-15 (n = 17/48.6% of the blaESBLs ), blaCTX-M-1 (n = 10/28.6%), blaCTX-M-55 (n = 4/11.4%), blaCTX-M-14 (n = 3/8.6%), and blaCTX-M-27 (n = 1/2.9%) were identified. The plasmid-mediated fluoroquinolone resistance genes aac(6')-Ib-cr, qnrB and the azithromycin resistance gene mph(A) were detected in 17 (26...
March 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29473791/first-report-of-an-st410-oxa-181-and-ctx-m-15-coproducing-escherichia-coli-clone-in-italy-a-whole-genome-sequence-characterization
#7
Aurora Piazza, Francesco Comandatore, Francesca Romeri, Cristina Pagani, Anna Maria Floriano, Annalisa Ridolfo, Carlo Antona, Matteo Brilli, Vittoria Mattioni Marchetti, Claudio Bandi, Maria Rita Gismondo, Sara Giordana Rimoldi
We investigated an Italian OXA-181-producing Escherichia coli clinical isolate (ECS1_14) by whole-genome sequencing. The strain coharbored blaCTX-M-15 , blaCMY-2 , and qnrS1 genes; it belonged to ST410(Achtman)/ST692(Pasteur) and phylogroup A. The blaOXA-181 gene was harbored on a plasmid highly similar (99% identity) to the pOXA181_EC14828 plasmid, recently reported in China.
February 23, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29237086/enterobacteriaceae-producing-oxa-48-like-carbapenemases-in-poland-2013-january-2017
#8
R Izdebski, A Baraniak, D Zabicka, M Machulska, P Urbanowicz, J Fiett, E Literacka, K Bojarska, A Kozinska, B Zieniuk, W Hryniewicz, M Gniadkowski
Objectives: To analyse OXA-48 (OXA-48/181)-type carbapenemase-producing Enterobacteriaceae reported in Poland from 2013 until January 2017. Methods: Bacterial isolates were typed by PFGE and MLST. Genes coding for OXA-48/181 types and other β-lactamases were amplified and sequenced. Mobile elements with blaOXA-48/181-like genes were PCR mapped. blaOXA-48/181-carrying plasmids were characterized by nuclease S1-hybridization profiling, transfer assays and PCR-based replicon typing, while the chromosomal location of the genes was confirmed by the I-CeuI analysis...
December 9, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29209306/ctx-m-15-producing-e-coli-isolates-from-food-products-in-germany-are-mainly-associated-with-an-incf-type-plasmid-and-belong-to-two-predominant-clonal-e-coli-lineages
#9
Alexandra Irrgang, Linda Falgenhauer, Jennie Fischer, Hiren Ghosh, Elisabet Guiral, Beatriz Guerra, Silvia Schmoger, Can Imirzalioglu, Trinad Chakraborty, Jens A Hammerl, Annemarie Käsbohrer
Extended-spectrum beta-lactamases (ESBL) mediating resistance to 3rd generation cephalosporins are a major public health issue. As food may be a vehicle in the spread of ESLB-producing bacteria, a study on the occurrence of cephalosporin-resistantu Escherichia coli in food was initiated. A total of 404 ESBL-producing isolates were obtained from animal-derived food samples (e.g., poultry products, pork, beef and raw milk) between 2011 and 2013. As CTX-M-15 is the most abundant enzyme in ESBL-producing E. coli causing human infections, this study focusses on E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29163817/characteristics-and-genetic-diversity-of-multi-drug-resistant-extended-spectrum-beta-lactamase-esbl-producing-escherichia-coli-isolated-from-bovine-mastitis
#10
Tariq Ali, Sadeeq Ur Rahman, Limei Zhang, Muhammad Shahid, Dandan Han, Jian Gao, Shiyao Zhang, Pamela L Ruegg, Umer Saddique, Bo Han
A characterization of the drug resistance profiles, identification of PCR-based replicon typing, and multilocus sequence typing (MLST) and analysis of 46 ESBL-producing Escherichia coli from cows with mastitis are described. All multidrug-resistant isolates of various phylogenetic groups (A = 31, B1= 3, B2 = 2, D = 10) were ESBL-producers of genotypes CTX-M-15 (29), CTX-M-55 (4), CTX-M-14 (4), CTX-M-3 (1), CTX-M-1 (1), TEM (22) and SHV (8) that were found on conjugative plasmids of diverse incompatibility groups (primarily IncF)...
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29102103/frequency-antimicrobial-susceptibility-and-clonal-distribution-of-methicillin-resistant-staphylococcus-pseudintermedius-in-canine-clinical-samples-submitted-to-a-veterinary-diagnostic-laboratory-in-italy-a-3-year-retrospective-investigation
#11
G Ventrella, A Moodley, E Grandolfo, A Parisi, M Corrente, D Buonavoglia, L Guardabassi
In the last decade there has been a rapid global spread of methicillin-resistant Staphylococcus pseudintermedius (MRSP) clones displaying multidrug resistance in dogs. We investigated prevalence, antimicrobial susceptibility and clonal distribution of MRSP isolated from clinical canine samples between during 2011-2014. Following species identification by nuc PCR, MRSP were confirmed by the presence of mecA and characterized by antimicrobial susceptibility testing, Pulsed Field Gel Electrophoresis (PFGE), SCCmec typing, and Multi-Locus Sequence Typing (MLST) of a few isolates having distinct PFGE profiles...
November 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28953418/molecular-characterization-of-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-isolates-from-milk-samples-of-dairy-cows-with-mastitis-in-bavaria-germany
#12
David Eisenberger, Anja Carl, Joachim Balsliemke, Peter Kämpf, Silke Nickel, Gesine Schulze, Giuseppe Valenza
The aim of this study was to determine the rate of extended-spectrum β-lactamase (ESBL)-producing microorganisms among Escherichia coli isolates causing bovine mastitis, including molecular characterization of these isolates. Therefore, a total of 490 bovine E. coli isolates from milk samples of dairy cows with mastitis were investigated for ESBL production by antimicrobial susceptibility testing, PCR-based detection, and sequencing of ESBL encoding genes, which were identified in 22 isolates (4.5%). Moreover, resistance to the fluoroquinolones enrofloxacin and marbofloxacin occurred in 15 of 22 ESBL-producing isolates (68...
May 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28686503/characterization-of-carbapenem-resistant-escherichia-coli-isolates-through-the-whole-genome-sequencing-analysis
#13
Yanping Luo, Rong Luo, Hong Ding, Xiu Ren, Haipeng Luo, Ying Zhang, Liyan Ye, Shenghui Cui
Limited studies have characterized multiple carbapenem-resistant Escherichia coli isolates and compared their genetic characteristics through whole-genome sequencing (WGS) because of the scarcity of these isolates. In this study, we determined the prevalence of carbapenem resistance in 2,993 E. coli isolates collected from three Chinese hospitals. The carbapenem-resistant isolates were further characterized by WGS, and the molecular epidemiological characters and resistance mechanisms were explored through the publicly available platforms from the Center for Genomic Epidemiology...
March 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28419868/ciprofloxacin-resistance-in-uropathogenic-escherichia-coli-isolates-causing-community-acquired-urinary-infections-in-bras%C3%A3-lia-brazil
#14
Rafaella Christina Rocha Moreira da Silva, Paulo de Oliveira Martins Júnior, Laura Fernandes Gonçalves, Vicente de Paulo Martins, Ana Beatriz Fabrício de Melo, André Pitondo-Silva, Tatiana Amabile de Campos
OBJECTIVES: Considering the global concern of ciprofloxacin resistance, the aim of this study was to evaluate the characteristics of ciprofloxacin-resistant (CIP-R) Escherichia coli isolated from patients with community-acquired urinary tract infections (UTIs) in Brasília, Brazil. METHODS: CIP-R E. coli isolated from different outpatients between July 2013 and April 2014 in a tertiary hospital were analysed for antibiotic resistance profile, phylotype, uropathogenic E...
June 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28380311/spread-of-ctx-type-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-isolates-of-epidemic-clone-b2-o25-st131-among-dogs-and-cats-in-japan
#15
Kumiko Kawamura, Tae Sugawara, Nao Matsuo, Kengo Hayashi, Chihiro Norizuki, Kiyoko Tamai, Takaaki Kondo, Yoshichika Arakawa
This study was performed to investigate the carriage rates of CTX-M-type extended-spectrum β-lactamase (ESBL)-producing Escherichia coli among ill companion animals in Japan. Among the 178 nonrepetitive E. coli isolates, including 131 from dogs and 47 from cats, collected between September and November 2015, 42 (23.6%) isolates from 29 dogs and 13 cats were identified as ESBL producers. The antimicrobial susceptibility, O serotype, phylogenetic group, β-lactamase genotype, plasmid replicon type, and sequence type (ST) of each isolate were analyzed...
December 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28369408/wgs-based-surveillance-of-third-generation-cephalosporin-resistant-escherichia-coli-from-bloodstream-infections-in-denmark
#16
Louise Roer, Frank Hansen, Martin Christen Frølund Thomsen, Jenny Dahl Knudsen, Dennis Schrøder Hansen, Mikala Wang, Jurgita Samulioniené, Ulrik Stenz Justesen, Bent L Røder, Helga Schumacher, Claus Østergaard, Leif Percival Andersen, Esad Dzajic, Turid Snekloth Søndergaard, Marc Stegger, Anette M Hammerum, Henrik Hasman
Objectives: To evaluate a genome-based surveillance of all Danish third-generation cephalosporin-resistant Escherichia coli (3GC-R Ec ) from bloodstream infections between 2014 and 2015, focusing on horizontally transferable resistance mechanisms. Methods: A collection of 552 3GC-R Ec isolates were whole-genome sequenced and characterized by using the batch uploader from the Center for Genomic Epidemiology (CGE) and automatically analysed using the CGE tools according to resistance profile, MLST, serotype and fimH subtype...
July 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28368864/characterization-of-esbl-producing-escherichia-coli-recovered-from-companion-dogs-in-tai-an-china
#17
Song Li, Junhe Liu, Yufa Zhou, Zengmin Miao
INTRODUCTION: Animals are considered to be reservoirs of extended-spectrum beta-lactamase (ESBL)-producing bacteria, but few epidemiological data on ESBL-producing Escherichia coli urinary tract isolates in pet dogs are available in China. METHODOLOGY: This study was conducted to describe the prevalence and characterization of ESBL producers among E. coli urinary tract isolates from pet dogs in Tai'an, China. RESULTS: A total of 118 E. coli were obtained from urinary samples of 80 companion dogs suffering from acute or chronic cystitis, of which three isolates from different dogs were ESBL producers...
March 31, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27876781/first-identification-of-ndm-4-producing-escherichia-coli-st410-in-china
#18
Shangshang Qin, Mengmeng Zhou, Qijing Zhang, Hengxun Tao, Yafei Ye, Huizhi Chen, Lijuan Xu, Hui Xu, Ping Wang, Xianju Feng
No abstract text is available yet for this article.
November 23, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27572405/characterization-of-a-novel-inchi2-plasmid-carrying-tandem-copies-of-blactx-m-2-in-a-fosa6-harboring-escherichia-coli-sequence-type-410-strain
#19
Qinglan Guo, Baixing Ding, Thomas Jové, Nicole Stoesser, Vaughn S Cooper, Minggui Wang, Yohei Doi
The extended-spectrum β-lactamase gene blaCTX-M-2 is mainly associated with ISCR1 embedded in complex sul1-type integrons, but information on the genetic context of plasmids harboring the ISCR1-blaCTX-M-2 module remains limited. In this study, a blaCTX-M-2 -harboring plasmid (pYD786-1) belonging to the sequence type 2 (ST2)-IncHI2 plasmid type and isolated from an Escherichia coli ST410 clinical strain was sequenced and analyzed. pYD786-1 belongs to the APEC-O1-R-type IncHI2 plasmids, which are widely distributed in human, poultry, and livestock strains...
November 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27357252/multilocus-sequence-typing-and-ctx-m-characterization-of-esbl-producing-e-coli-a-prospective-single-centre-study-in-lower-saxony-germany
#20
G Gerhold, M H Schulze, U Gross, W Bohne
The increasing prevalence of extended-spectrum β-lactamase (ESBL)-producing Gram-negative bacteria is a serious threat for current healthcare settings. In this study we investigated the molecular epidemiology of ESBL-producing E. coli at the University Medical Center Göttingen in Lower Saxony, Germany. All E. coli isolates with an ESBL phenotype were collected during a 6-month period in 2014. Multilocus sequence typing and CTX-M characterization were performed on 160 isolates. Of the ESBL-producing isolates 95·6% were CTX-M positive...
November 2016: Epidemiology and Infection
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