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Lisa Helldal, Nahid Karami, Christina Welinder-Olsson, Edward R B Moore, Christina Åhren
BACKGROUND: To identify the spread of nosocomial infections and halt outbreak development caused by Escherichia coli that carry multiple antibiotic resistance factors, such as extended-spectrum beta-lactamases (ESBLs) and carbapenemases, is becoming demanding challenges due to the rapid global increase and constant and increasing influx of these bacteria from the community to the hospital setting. Our aim was to assess a reliable and rapid typing protocol for ESBL-E. coli, with the primary focus to screen for possible clonal relatedness between isolates...
January 6, 2017: BMC Microbiology
Marlène Sauget, Pascal Cholley, Andréa Vannier, Michelle Thouverez, Marie-Hélène Nicolas-Chanoine, Didier Hocquet, Xavier Bertrand
Sequence type 131 (ST131) is a predominant lineage among extraintestinal pathogenic Escherichia coli. It plays a major role in the worldwide dissemination of E. coli producing extended-spectrum β-lactamases (ESBLs). Here we describe the long-term epidemiology of this clonal group in a French university hospital, where the incidence of ESBL-producing E. coli has increased from 0.018 case per 1000 patient-days in the year 2000 to 0.50 case per 1000 patient-days in 2014. The first of the 141 ST131 isolates was recovered in 2006, and the ST131 clonal group accounted for 18...
December 2016: International Journal of Antimicrobial Agents
Sofia Ny, Sonja Löfmark, Stefan Börjesson, Stina Englund, Maj Ringman, Jakob Bergström, Pontus Nauclér, Christian G Giske, Sara Byfors
OBJECTIVES: Community carriage of ESBL-producing Escherichia coli (EPE) is common worldwide and there is a need to understand the connection between carriage and infection. We compared the molecular characteristics of EPE among Swedish community carriers with those of EPE causing invasive infections. METHODS: We collected 2134 faecal samples from randomly selected Swedish inhabitants and examined them for the presence of EPE. All participating volunteers answered a questionnaire about putative risk factors for EPE carriage...
October 24, 2016: Journal of Antimicrobial Chemotherapy
Fusun Can, Özlem Kurt-Azap, Pelin İspir, Elif Nurtop, Ceren Seref, İlayda Loçlar, Ozge Nur Aktaş, Yelda Ceren Orhan, Onder Ergonul
In this study, risk factors for ST131 H30 and H30-Rx subclones among urinary tract infections (UTIs) caused by multidrug-resistant (MDR) Escherichia coli were described. Urine samples were collected from consecutive outpatients registered to the outpatient clinics of Başkent University Hospital (Ankara, Turkey) with complaints of acute cystitis in 2011. A total of 107 MDR E. coli isolates were included in the study. Of the 107 isolates studied, 26 (24.3%) were typed as ST131 clone. Extended-spectrum β-lactamase (ESBL)-producers accounted for 59 (55...
March 2016: Journal of Global Antimicrobial Resistance
Arash Ghodousi, Celestino Bonura, Paola Di Carlo, Willem B van Leeuwen, Caterina Mammina
Extraintestinal pathogenic Escherichia coli sequence type 131 (ST131), typically fluoroquinolone-resistant (FQ-R) and/or extended-spectrum β-lactamase (ESBL)-producing, has emerged globally. Among clinical isolates, ST131, primarily its H30-R and H30-Rx subclones, accounts for most antimicrobial-resistant E. coli and is the dominant E. coli strain worldwide. We assessed its prevalence and characteristics among raw chicken meat samples on sale in Palermo, Italy. A collection of 237 fluoroquinolone resistant and ESBL/AmpC producing E...
July 2, 2016: International Journal of Food Microbiology
Sohinee Sarkar, Dimitrios Vagenas, Mark A Schembri, Makrina Totsika
Escherichia coli sequence type 131 (ST131) has emerged as a pandemic lineage of important multidrug resistant pathogens worldwide. Despite many studies examining the epidemiology of ST131, only a few studies to date have investigated the capacity of ST131 strains to form biofilms. Some of these studies have reported contrasting findings, with no specific ST131 biofilm-promoting factors identified. Here, we examined a diverse collection of ST131 isolates for in vitro biofilm formation in different media and assay conditions, including urine from healthy adult women...
April 2016: Pathogens and Disease
Alix Pantel, Catherine Dunyach-Remy, Christelle Ngba Essebe, Jennifer Mesureur, Albert Sotto, Jean-Marie Pagès, Marie-Hélène Nicolas-Chanoine, Jean-Philippe Lavigne
Energy-dependent efflux overexpression and altered outer membrane permeability (influx) can promote multidrug resistance (MDR). The present study clarifies the regulatory pathways that control membrane permeability in the pandemic clone Escherichia coli sequence type 131 (ST131) and evaluates the impact of efflux and influx modulations on biofilm formation, motility, and virulence in the Caenorhabditis elegans model. Mutants of two uropathogenic E. coli (UPEC) strains, MECB5 (ST131; H30-Rx) and CFT073 (ST73), as well as a fecal strain, S250 (ST131; H22), were in vitro selected using continuous subculture in subinhibitory concentrations of ertapenem (ETP), chloramphenicol (CMP), and cefoxitin (FOX)...
May 2016: Antimicrobial Agents and Chemotherapy
Fusun Can, Ozlem Kurt-Azap, Elif Nurtop, Pelin Ispir, Ceren Seref, Onder Ergonul
Bloodstream infections caused by E. coli ST131 and ST131 H30-Rx subclones have emerged worldwide. This study was carried out to evaluate the prevalence of ST131-Rx subclone and characterize the virulence properties of the Rx among the bloodstream E. coli isolates. A total of 297 non-duplicated E.coli bloodstream isolates were studied. Antibiotic susceptibilities were tested using the disk diffusion method. PCR amplification and sequencing was used to identify ST131 and H30-Rx, the virulence gene, the betalactamase, and virotype...
January 20, 2016: Journal of Medical Microbiology
Alessandro Bartoloni, Samanta Sennati, Tiziana Di Maggio, Antonia Mantella, Eleonora Riccobono, Marianne Strohmeyer, Carmen Revollo, Ana Liz Villagran, Lucia Pallecchi, Gian Maria Rossolini
BACKGROUND: Bolivia is among the lowest-resourced South American countries, with very few data available on antibiotic resistance in bacterial pathogens. The phenotypic and molecular characterization of bacterial isolates responsible for urinary tract infections (UTIs) in the Bolivian Chaco are reported here. METHODS: All clinical isolates from UTIs collected in the Hospital Basico Villa Montes between June 2010 and January 2014 were analyzed (N=213). Characterization included susceptibility testing, extended-spectrum beta-lactamase (ESBL) detection, identification of relevant resistance determinants (e...
February 2016: International Journal of Infectious Diseases: IJID
Scott J Weissman, Nellie I Hansen, Kristen Zaterka-Baxter, Rosemary D Higgins, Barbara J Stoll
BACKGROUND: Escherichia coli associated with early-onset sepsis (EOS) have historically been antibiotic-susceptible and K1-encapsulated. In the era of emerging antibiotic resistance, however, the clonal makeup of E coli associated with EOS has not been well characterized. METHODS: Escherichia coli isolates were collected from 28 cases of EOS and early-onset meningitis (EOM) from April 2008 through December 2009, during a parent study conducted at National Institute of Child Health and Human Development Neonatal Research Network centers from February 2006 through December 2009...
September 2016: Journal of the Pediatric Infectious Diseases Society
Amit Ranjan, Sabiha Shaik, Arif Hussain, Nishant Nandanwar, Torsten Semmler, Savita Jadhav, Lothar H Wieler, Niyaz Ahmed
Escherichia coli sequence type 131 (ST131) is a pandemic clone associated with multidrug-resistant, extraintestinal infections, attributable to the presence of the CTX-M-15 extended-spectrum β-lactamase gene and mutations entailing fluoroquinolone resistance. Studies on subclones within E. coli ST131 are critically required for targeting and implementation of successful control efforts. Our study comprehensively analyzed the genomic and functional attributes of the H30-Rx subclonal strains NA097 and NA114, belonging to the ST131 lineage...
October 2015: Antimicrobial Agents and Chemotherapy
Sarah M Drawz, Stephen Porter, Michael A Kuskowski, Brian Johnston, Connie Clabots, Susan Kline, Patricia Ferrieri, James R Johnson
Escherichia coli sequence type 13 (ST131), an emergent cause of multidrug-resistant extraintestinal infections, has important phylogenetic subsets, notably the H30 and H30Rx subclones, with distinctive resistance profiles and, possibly, clinical associations. To clarify the local prevalence of these ST131 subclones and their associations with antimicrobial resistance, ecological source, and virulence traits, we extensively characterized 233 consecutive E. coli clinical isolates (July and August 2013) from the University of Minnesota Medical Center-Fairview Infectious Diseases and Diagnostic Laboratory, Minneapolis, MN, which serves three adjacent facilities (a children's hospital and low- and high-acuity adult facilities)...
September 2015: Antimicrobial Agents and Chemotherapy
Mary J Burgess, James R Johnson, Stephen B Porter, Brian Johnston, Connie Clabots, Brian D Lahr, James R Uhl, Ritu Banerjee
Background.  Emerging data implicate long-term care facilities (LTCFs) as reservoirs of fluoroquinolone-resistant (FQ-R) Escherichia coli of sequence type 131 (ST131). We screened for ST131 among LTCF residents, characterized isolates molecularly, and identified risk factors for colonization. Methods.  We conducted a cross-sectional study using a single perianal swab or stool sample per resident in 2 LTCFs in Olmsted County, Minnesota, from April to July 2013. Confirmed FQ-R E. coli isolates underwent polymerase chain reaction-based phylotyping, detection of ST131 and its H30 and H30-Rx subclones, extended virulence genotyping, and pulsed-field gel electrophoresis (PFGE) analysis...
January 2015: Open Forum Infectious Diseases
James R Johnson, Brian Johnston, Michael A Kuskowski, Evgeni V Sokurenko, Veronika Tchesnokova
The recent expansion of the H30 subclone of Escherichia coli sequence type 131 (ST131) and its CTX-M-15-associated H30Rx subset remains unexplained. Although ST131 H30 typically exhibits fluoroquinolone resistance, so do multiple other E. coli lineages that have not expanded similarly. To determine whether H30 isolates have more intense fluoroquinolone resistance than other fluoroquinolone-resistant E. coli isolates and to identify possible mechanisms, we determined the MICs for four fluoroquinolones (ciprofloxacin, levofloxacin, moxifloxacin, and norfloxacin) among 89 well-characterized, genetically diverse fluoroquinolone-resistant E...
August 2015: Antimicrobial Agents and Chemotherapy
Amy J Mathers, Gisele Peirano, Johann D D Pitout
Escherichia coli sequence type 131 (ST131) and Klebsiella pneumoniae ST258 emerged in the 2000s as important human pathogens, have spread extensively throughout the world, and are responsible for the rapid increase in antimicrobial resistance among E. coli and K. pneumoniae strains, respectively. E. coli ST131 causes extraintestinal infections and is often fluoroquinolone resistant and associated with extended-spectrum β-lactamase production, especially CTX-M-15. K. pneumoniae ST258 causes urinary and respiratory tract infections and is associated with carbapenemases, most often KPC-2 and KPC-3...
July 2015: Clinical Microbiology Reviews
Catherine Ludden, Martin Cormican, Akke Vellinga, James R Johnson, Bernie Austin, Dearbháile Morris
BACKGROUND: This study examined colonisation with and characteristics of antimicrobial-resistant organisms among residents of a long-term care facility (LTCF) over one year, including strain persistence and molecular diversity among isolates of extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae. METHODS: Sixty-four residents of a LTCF were recruited (51 at baseline, 13 during the year). Data on dependency levels, hospitalisations, and antimicrobial prescribing were collected...
2015: BMC Infectious Diseases
Jatan Bahadur Sherchan, Kayoko Hayakawa, Tohru Miyoshi-Akiyama, Norio Ohmagari, Teruo Kirikae, Maki Nagamatsu, Masayoshi Tojo, Hiroshi Ohara, Jeevan B Sherchand, Sarmila Tandukar
Recently, CTX-M-type extended-spectrum-β-lactamase (ESBL)-producing Escherichia coli strains have emerged worldwide. In particular, E. coli with O antigen type 25 (O25) and sequence type 131 (ST131), which is often associated with the CTX-M-15 ESBL, has been increasingly reported globally; however, epidemiology reports on ESBL-producing E. coli in Asia are limited. Patients with clinical isolates of ESBL-producing E. coli in the Tribhuvan University teaching hospital in Kathmandu, Nepal, were included in this study...
2015: Antimicrobial Agents and Chemotherapy
J Lafolie, M Sauget, N Cabrolier, D Hocquet, X Bertrand
BACKGROUND: Sequence type 131 (ST131) is a predominant lineage among extraintestinal pathogenic Escherichia coli. It plays a major role in the worldwide dissemination of extended-spectrum β-lactamase (ESBL)-producing E. coli. The ST131 pandemic is mainly the result of clonal expansion of the single well-adapted subclone H30-Rx, which is acquired in hospitals more frequently than other ESBL-producing E. coli clones. AIM: To develop a rapid method using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) to identify ST131 for infection control purposes...
July 2015: Journal of Hospital Infection
Amy J Mathers, Gisele Peirano, Johann D D Pitout
Escherichia coli ST131 emerged during the early to mid-2000s is an important human pathogen, has spread extensively throughout the world, and is responsible for the rapid increase in antimicrobial resistance among E. coli. ST131 is known to cause extraintestinal infections, being fluoroquinolone resistant, and is associated with ESBL production most often due to CTX-M-15. Recent molecular epidemiologic studies using whole-genome sequencing and phylogenetic analysis have demonstrated that the H30 ST131 lineage emerged in early 2000s that was followed by the rapid expansion of its sublineages H30-R and H30-Rx...
2015: Advances in Applied Microbiology
Pak-Leung Ho, Yuki Pui-Shan Chu, Wai-U Lo, Kin-Hung Chow, Pierra Y Law, Cindy Wing-Sze Tse, Tak-Keung Ng, Vincent Chi-Chung Cheng, Tak-Lun Que
Previous work on the subclones within Escherichia coli ST131 predominantly involved isolates from Western countries. This study assessed the prevalence and antimicrobial resistance attributed to this clonal group. A total of 340 consecutive, non-duplicated urinary E. coli isolates originating from four clinical laboratories in Hong Kong in 2013 were tested. ST131 prevalence among the total isolates was 18.5 % (63/340) and was higher among inpatient isolates (23.0 %) than outpatient isolates (11.8 %, P<0...
March 2015: Journal of Medical Microbiology
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