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https://www.readbyqxmd.com/read/28511382/rapid-identification-of-vancomycin-resistant-enterococcus-faecalis-clinical-isolates-using-a-sugar-fermentation-method
#1
Javad Raeisi, Mahnaz Saifi, Mohammad Reza Pourshafie, Mehri Habibi, Hamid Reza Mohajerani, Neda Akbari, Mohammad Reza Asadi Karam
INTRODUCTION: Vancomycin Resistant Enterococci (VRE) can be found all over the world. Thus, rapid detection of the isolates could be of high importance in the treatment or prevention of the associated disease. AIM: To measure the turanose fermentation in Enterococcus faecalis clinical isolates for rapid differentiation of VRE and Vancomycin-Susceptible E. faecalis (VSE) isolates. MATERIALS AND METHODS: Forty E. faecalis samples were isolated from 200 clinical samples in Tehran Medical Center, Iran, from October 2012 to December 2012...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28504889/genetic-characterization-of-vana-enterococcus-faecium-isolates-from-wild-red-legged-partridges-in-portugal
#2
Vanessa Silva, Gilberto Igrejas, Isabel Carvalho, Fernando Peixoto, Lucas Cardoso, José Eduardo Pereira, Rosa Del Campo, Patricia Poeta
Vancomycin-resistant enterococci (VRE) have been detected in wild animals representing a public health concern. The red-legged partridge (Alectoris rufa) is a common game bird and its meat is consumed in several countries, including Portugal. Three hundred five fecal samples of red-legged partridge from the north of Portugal were screened for VRE. Samples were cultured on Slanetz-Bartley agar supplemented with vancomycin (4 mg/L) and six vanA-Enterococcus faecium were recovered. Isolates were tested for antibiotic resistance and virulence genes...
May 15, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28500123/enterococcus-casseliflavus-septicaemia-associated-with-hepatobiliary-infection-in-a-75-year-old-man
#3
Rajanshu Verma, Allison L Baroco
Enterococcus casseliflavus is a rare non-faecium, non-faecalis, vancomycin-resistant enterococcus (VRE) that is responsible for up to 2% of all enterococcal infections. Septicaemia with this bacterium is usually seen in older patients with multiple comorbidities who have had several previous hospitalisations. Septicaemia with E. casseliflavus portends a poorer prognosis, and treatment usually involves administration of antienterococcal beta-lactams or anti-VRE medications such as linezolid or daptomycin. We present such a case of a 75-year-old man who developed E...
May 12, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28494240/cooperating-commensals-restore-colonization-resistance-to-vancomycin-resistant-enterococcus-faecium
#4
Silvia Caballero, Sohn Kim, Rebecca A Carter, Ingrid M Leiner, Bože Sušac, Liza Miller, Grace J Kim, Lilan Ling, Eric G Pamer
Antibiotic-mediated microbiota destruction and the consequent loss of colonization resistance can result in intestinal domination with vancomycin-resistant Enterococcus (VRE), leading to bloodstream infection in hospitalized patients. Clearance of VRE remains a challenging goal that, if achieved, would reduce systemic VRE infections and patient-to-patient transmission. Although obligate anaerobic commensal bacteria have been associated with colonization resistance to VRE, the specific bacterial species involved remain undefined...
May 10, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28494236/allied-commensal-forces-against-vancomycin-resistant-enterococci
#5
Brayon J Fremin, Ami S Bhatt
In this issue of Cell Host & Microbe, Caballero et al. (2017) define a precise, limited consortium of commensal bacteria that restores resistance to colonization by clinically vexing vancomycin-resistant Enterococcus species.
May 10, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28490489/single-negative-van-qpcr-on-enrichment-broth-can-replace-five-rectal-swab-cultures-for-the-screening-of-vancomycin-resistent-enterococci
#6
J M Fonville, C M C van Herk, P H A C Das, J H B van de Bovenkamp, L van Dommelen
The increased incidence of vancomycin resistant Enterococcus spp. (VRE) causes an accumulation of patients that are either VRE-colonized or flagged as potentially VRE-colonized. Since such patients require precautionary isolation upon admission to a hospital, rapid methods to establish VRE-colonization status would improve patient care and optimize hospital operation. We evaluated van qPCR on one enrichment broth as a VRE-screening approach.We obtained 255 sets of five rectal specimens from 243 patients. The specimens were cultured using an amoxicillin-containing enrichment broth...
May 10, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28484708/activity-of-fosfomycin-and-daptomycin-containing-bone-cement-on-selected-bacterial-species-being-associated-with-orthopedic-infections
#7
Sigrun Eick, Kevin Hofpeter, Anton Sculean, Claudia Ender, Susann Klimas, Sebastian Vogt, Sandor Nietzsche
The purpose of this study was to determine activity of fosfomycin/gentamicin and daptomycin/gentamicin-containing PMMA bone-cement against Staphylococcus aureus (MRSA, MSSA), Staphylococcus epidermidis, Enterococcus faecium (VRE), and E. coli (ESBL; only fosfomycin). Test specimens of the bone cement were formed and bacteria in two concentrations were added one time or repeatedly up to 96 h. All fosfomycin-containing cement killed ultimately all MSSA, Staphylococcus epidermidis, and E. coli within 24 h; growth of MRSA was suppressed up to 48 h...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28465627/nutritional-control-of-antibiotic-production-by-streptomyces-platensis-ma7327-importance-of-l-aspartic-acid
#8
Maria Falzone, Emmanuel Crespo, Klarissa Jones, Gulaba Khan, Victoria L Korn, Amreen Patel, Mira Patel, Krishnaben Patel, Carrie Perkins, Sana Siddiqui, Drew Stenger, Eileen Yu, Michael Gelber, Robert Scheffler, Vasyl Nayda, Ariela Ravin, Ronica Komal, Jeffrey D Rudolf, Ben Shen, Vincent Gullo, Arnold L Demain
Streptomyces platensis MA7327 is a bacterium producing interesting antibiotics, which act by the novel mechanism of inhibiting fatty acid biosynthesis. The antibiotics produced by this actinomycete are platensimycin and platencin plus some minor related antibiotics. Platensimycin and platencin have activity against antibiotic-resistant bacteria such as methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus; they also lack toxicity in animal models. Platensimycin also has activity against diabetes in a mouse model...
May 3, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28464539/vancomycin-resistant-enterococci-with-vana-and-vanb-genes-in-australian-gulls
#9
Veronika Oravcova, Pavel Svec, Ivan Literak
This study is revealing the possible dissemination of vancomycin-resistant enterococci (VRE) from humans into the wildlife. We studied silver gulls (Chroicocephalus novaehollandiae) in Australia as potential carriers and reservoirs of VRE with acquired vancomycin resistance. In New South Wales (Australia), we have found two multi-resistant isolates belonging to Enterococcus faecium (sequence type 341, vanB genotype) and Enterococcus dispar (vanA genotype). Based on our knowledge, this is the first report of VRE in Australian wildlife...
May 2, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28427133/-effects-of-application-of-vancomycin-in-the-early-stage-of-patients-with-extremely-severe-burn
#10
Z Zhu, G W Cao, J J Bao, Z H Hu, Z Shen, H Tao, B Cao, F Xu
Objective: To evaluate the effects of application of vancomycin in the early stage of patients with extremely severe burn, in order to provide reference to drug for anti-infection treatment in the early stage of patients with extremely severe burn. Methods: Data of 15 patients of Kunshan explosion on August 2nd, 2014, admitted to the Department of Intensive Care in our hospital were retrospectively analyzed. The clinical efficacy of continuously intravenous dripping of vancomycin (combined with imipenem) in the early stage of burns (before and on post burn day 14) was analyzed...
April 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28423435/-pathogen-spectrum-of-complex-wounds-in-germany-from-war-zones
#11
Hans Joachim Riesner, Benedikt Friemert, Patricia Lang, Hans Georg Palm, Arnold J Suda
Background Treatment of the injured from war zones with wounds with multi-resistant pathogens is becoming more common in Germany, especially in German Armed Forces Hospitals. In most cases, the pre-treatment of these patients has been inadequate and they have a high load of rare pathogens. In Germany, hospitals have to evaluate these pathogens by law. The aim of this study was to review current German guidelines and data on the array of pathogens of complex trauma wounds in Germany and to compare patients with wounds and multi-resistant pathogens from war zones treated in Germany...
April 19, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28406232/peptidoglycan-o-acetylation-increases-in-response-to-vancomycin-treatment-in-vancomycin-resistant-enterococcus-faecalis
#12
James D Chang, Erin E Foster, Ashley G Wallace, Sung Joon Kim
Vancomycin resistance is conferred upon vancomycin-resistant enterococci (VRE) through the replacement of peptidoglycan (PG) stem terminal d-Ala-d-Ala with d-Ala-d-Lac. The d-Ala-d-Lac incorporation can affect both the fitness and virulence of VRE. Here we comprehensively investigate the changes to PG composition in vancomycin-resistant Enterococcus faecalis following the growth in presence of vancomycin using liquid chromatography-mass spectrometry. Using high-resolution mass spectrometry, 104 unique muropeptides fragments were identified and the relative abundance of each fragment was accurately quantified by integrating the ion current of a selected ion using extracted-ion chromatogram...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28402152/daptomycin-nonsusceptible-vancomycin-resistant-enterococcus-bloodstream-infections-in-patients-with-hematological-malignancies-risk-factors-and-outcomes
#13
Erica S Herc, Carol A Kauffman, Bernard L Marini, Anthony J Perissinotti, Marisa H Miceli
Daptomycin is typically the treatment of choice for vancomycin resistant Enterococcus (VRE) bloodstream infections (BSI) in patients with hematological malignancies, but increasingly daptomycin nonsusceptible VRE are being reported. We reviewed our experience with daptomycin nonsusceptible VRE BSI among patients with hematological malignancies. We compared risk factors and outcomes of 20 patients with daptomycin nonsusceptible VRE BSI (case patients) with 40 matched control patients with daptomycin susceptible VRE BSI...
April 12, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28389278/prenylated-flavonoids-from-the-stems-and-roots-of-tripterygium-wilfordii
#14
Yang Chen, Jianping Zhao, Yixing Qiu, Hanwen Yuan, Shabana I Khan, Nusrat Hussain, M Iqbal Choudhary, Feng Zeng, De-An Guo, Ikhlas A Khan, Wei Wang
Phytochemical investigation on the stems and roots of Tripterygium wilfordii led to the isolation and characterization of three new prenylated flavanones, tripteryols A-C (1-3), along with (±)-5,4'-dihydroxy-2'-methoxy-6',6″-dimethypyraro-(2″,3″:7,8)-6-methyflavanone (4), and ((2S)-5,7,4'-trihydroxy-2'-methoxy-8,5'-di(3-methyl-2-butenyl)-6-methylflavanone (5). Structures of the compounds 1-5 were elucidated using spectroscopic techniques, such as UV, IR, NMR (1D and 2D), and HRESI-MS. Tripteryols B (2) was found active in the antimicrobial assay against Cryptococcus neoformans, Pseudomonas aeruginosa, vancomycin-resistant Enterococcus faecalis (VRE) and methicillin-resistant Staphylococcus aureus (MRSA) with IC50 values in the range of 2...
April 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28389190/detection-of-vancomycin-resistant-enterococci-vre-in-stool-specimens-submitted-for-clostridium-difficile-toxin-testing
#15
Sevim Özsoy, Arzu İlki
The aim of this study was to determine the association between Clostridium difficile (C. difficile) and vancomycin-resistant Enterococcus (VRE) and efficacy of screening stools submitted for C. difficile toxin assay for prevalence of VRE. Between April 2012 and February 2014, 158 stool samples submitted for C. difficile toxin to the Marmara University Microbiology Laboratory, were included in the study. Stool samples were analyzed by enzyme immuno assay test; VIDAS (bioMerieux, France) for Toxin A&B. Samples were inoculated on chromID VRE (bioMerieux, France) and incubated 24h at 37°C...
March 17, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28378583/iodinated-meroditerpenes-from-a-red-alga-callophycus-sp
#16
Serge Lavoie, David Brumley, Troy S Alexander, Christine Jasmin, Franz A Carranza, Kate Nelson, Cassandra L Quave, Julia Kubanek
Unique iodine-containing meroditerpenes iodocallophycoic acid A (1) and iodocallophycols A-D (2-5) were discovered from the Fijian red alga Callophycus sp. Because flexibility of the molecular skeleton impaired full characterization of relative stereochemistries by NMR spectroscopy, a DFT-based theoretical model was developed to derive relevant interproton distances which were compared to those calculated from NOE measurements, yielding the relative stereochemistries. The correct 2S,6S,7S,10S,14S enantiomers were then identified by comparison of theoretical and experimental ECD spectra...
April 13, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28371348/quaternized-and-thiazole-functionalized-free-radical-generating-organometallic-dendrimers-as-antimicrobial-platform-against-multidrug-resistant-microorganisms
#17
Alaa S Abd-El-Aziz, Christian Agatemor, Nola Etkin, Rabin Bissessur, David Overy, Martin Lanteigne, Katherine McQuillan, Russell G Kerr
New macromolecules such as dendrimers are increasingly needed to drive breakthroughs in diverse areas, for example, healthcare. Here, the authors report hybrid antimicrobial dendrimers synthesized by functionalizing organometallic dendrimers with quaternary ammonium groups or 2-mercaptobenzothiazole. The functionalization tunes the glass transition temperature and antimicrobial activities of the dendrimers. Electron paramagnetic resonance spectroscopy reveals that the dendrimers form free radicals, which have significant implications for catalysis and biology...
March 31, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28369204/prediction-of-bloodstream-infection-due-to-vancomycin-resistant-enterococci-in-patients-undergoing-leukemia-induction-or-hematopoietic-stem-cell-transplantation
#18
Brandon J Webb, Regan Healy, Jacob Majers, Zachary Burr, Michaela Gazdik, Bert Lopansri, Daanish Hoda, Finn Bo Petersen, Clyde Ford
Background.: Bloodstream infection (BSI) due vancomycin-resistant Enterococcus (VRE) is an important complication of hematologic malignancy. Determining when to use empiric anti-VRE antibiotic therapy in this population remains a clinical challenge. Methods.: A single-center cohort representing 664 admissions for induction or hematopoietic stem cell transplant (HSCT) from 2006-2014 was selected. We derived a prediction score using risk factors for VRE BSI and evaluated the model's predictive performance by calculating it for each of 16,232 BSI at-risk inpatient days...
March 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28362945/complex-routes-of-nosocomial-vancomycin-resistant-enterococcus-faecium-transmission-revealed-by-genome-sequencing
#19
Kathy E Raven, Theodore Gouliouris, Hayley Brodrick, Francesc Coll, Nicholas M Brown, Rosy Reynolds, Sandra Reuter, M Estée Török, Julian Parkhill, Sharon J Peacock
Background: Vancomycin-resistant Enterococcus faecium (VREfm) is a leading cause of nosocomial infection. Here, we describe the utility of whole-genome sequencing in defining nosocomial VREfm transmission. Methods: A retrospective study at a single hospital in the United Kingdom identified 342 patients with E. faecium bloodstream infection over 7 years. Of these, 293 patients had a stored isolate and formed the basis for the study. The first stored isolate from each case was sequenced (200 VREfm [197 vanA, 2 vanB, and 1 isolate containing both vanA and vanB], 93 vancomycin-susceptible E...
April 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28348103/risk-factors-and-outcomes-of-vancomycin-resistant-enterococcus-colonization-in-patients-on-peritoneal-dialysis-a-single-center-study-in-hong-kong
#20
Ching Shan Yeung, Chi Yuen Cheung, Yiu Han Chan, Wai-Leung Chak
♦ Background: Vancomycin-resistant Enterococcus (VRE) colonization is common among patients with chronic kidney disease. However, data concerning VRE colonization among patients receiving peritoneal dialysis (PD) is lacking. The aim of this study is to evaluate the risk factors and various clinical outcomes for VRE colonization among PD patients. ♦ Methods: This is a retrospective cohort study of 166 PD patients who were hospitalized between 1 August 2013 and 31 July 2014. They were screened for VRE colonization status during a major VRE outbreak in Hong Kong in 2013 and were then categorized into 2groups: VRE-positive and VRE-negative...
March 27, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
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