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https://www.readbyqxmd.com/read/28107695/antibacterial-activity-computational-analysis-and-host-toxicity-study-of-thymol-sulfonamide-conjugates
#1
Shasank S Swain, Sudhir K Paidesetty, Rabindra N Padhy
Methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin resistant Enterococcus faecalis (VRE) are notorious pathogenic multidrug resistant (MDR) bacteria in both hospital and community sectors, and today the first antibacterial drug sulfamethoxazole is ineffective. The monoterpene phenol, thymol was conjugated with seven sulfa drug derivatives individually, adopting the dye-azo synthesis protocol, and conjugates were characterized using spectral analysis techniques such as, UV, FTIR, MS, HPLC, (1)H NMR, (13)C NMR and SEM...
January 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28093424/strongyloides-hyperinfection-syndrome-and-vre-pneumonia
#2
Mohannad Abu Omar, Mouhanna Abu Ghanimeh, Sola Kim, Gregory Howell
Immunocompromised patients have high risk of infections from bacteria, viruses, fungi and parasites. One of these infections is those caused by Strongyloides stercoralis Immunocompromised patients are at risk of hyperinfection syndrome which is characterised with more systemic manifestation and a higher risk of morbidity and mortality. This can be complicated by coinfection with enteric organisms, specifically Gram-negative. Enterococci are Gram-positive cocci which are inhabitants of the human gastrointestinal tract...
January 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28089736/antibacterial-activity-of-limonium-brasiliense-baicuru-against-multidrug-resistant-bacteria-using-a-statistical-mixture-design
#3
Andressa Blainski, Barbara Gionco, Admilton G Oliveira, Galdino Andrade, Ieda S Scarminio, Denise B Silva, Norberto P Lopes, João C P Mello
ETHNOPHARMACOLOGICAL RELEVANCE: Limonium brasiliense (Boiss.) Kuntze (Plumbaginaceae) is commonly known as "baicuru" or "guaicuru" and preparations of its dried rhizomes have been populary used in the treatment of premenstrual syndrome and menstrual disorder, and as an antiseptic in genito-urinary infections. This study evaluated the potential antibacterial activity of rhizome extracts against multidrug-resistant bacterial strains using statistical mixture design. MATERIALS AND METHODS: The statistical design of four components (water, methanol, acetone and ethanol) produced 15 different extracts and also a confirmatory experiment, which was performed using water:acetone (3:7, v/v)...
January 13, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28057656/epidemiology-and-control-measures-of-outbreaks-due-to-antibiotic-resistant-organisms-in-europe-embargo-a-systematic-review-protocol
#4
Nithya Babu Rajendran, Beryl Primrose Gladstone, Jesús Rodríguez-Baño, Frangiscos Sifakis, Andreas Voss, Yehuda Carmeli, Francesco Robert Burkert, Panagiota Gkolia, Evelina Tacconelli
INTRODUCTION: Improving our understanding of outbreaks due to antibiotic-resistant bacteria (ARB) and their control is critical in the current public health scenario. The threat of outbreaks due to ARB requires multifaceted efforts. However, a global overview of epidemiological characteristics of outbreaks due to ARB and effective infection control measures is missing. In this paper, we describe the protocol of a systematic review aimed at mapping and characterising the epidemiological aspects of outbreaks due to ARB and infection control measures in European countries...
5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28049149/rela-mutant-enterococcus-faecium-with-multiantibiotic-tolerance-arising-in-an-immunocompromised-host
#5
Erin S Honsa, Vaughn S Cooper, Mohammed N Mhaissen, Matthew Frank, Jessica Shaker, Amy Iverson, Jeffrey Rubnitz, Randall T Hayden, Richard E Lee, Charles O Rock, Elaine I Tuomanen, Joshua Wolf, Jason W Rosch
: Serious bacterial infections in immunocompromised patients require highly effective antibacterial therapy for cure, and thus, this setting may reveal novel mechanisms by which bacteria circumvent antibiotics in the absence of immune pressure. Here, an infant with leukemia developed vancomycin-resistant Enterococcus faecium (VRE) bacteremia that persisted for 26 days despite appropriate antibiotic therapy. Sequencing of 22 consecutive VRE isolates identified the emergence of a single missense mutation (L152F) in relA, which constitutively activated the stringent response, resulting in elevated baseline levels of the alarmone guanosine tetraphosphate (ppGpp)...
January 3, 2017: MBio
https://www.readbyqxmd.com/read/28040891/quantification-of-d-ala-d-lac-terminated-peptidoglycan-structure-in-vancomycin-resistant-enterococcus-faecalis-using-a-combined-solid-state-nmr-and-mass-spectrometry-analysis
#6
James D Chang, Erin C Foster, Hao Yang, Sung Joon Kim
Induction of vancomycin resistance in vancomycin-resistant enterococci (VRE) involves replacement of the D-Ala-D-Ala terminus of peptidoglycan (PG) stems with D-Ala-D-Lac, dramatically reducing the binding affinity of vancomycin to lipid II. Effects from vancomycin resistance induction on Enterococcus faecalis (ATCC 51299) were characterized using a combined solid-state NMR and LC-MS analysis. Solid-state NMR directly measured the total amounts of D-Lac and L,D-Ala metabolized from [2-13C]pyruvate, accumulated Park's nucleotide, and changes to the PG bridge-linking density during early exponential growth phase (OD660nm 0...
December 31, 2016: Biochemistry
https://www.readbyqxmd.com/read/28039075/comparative-genome-analysis-of-multiple-vancomycin-resistant-enterococcus-faecium-isolated-from-two-fatal-cases
#7
Shu Yong Lim, Kien-Pong Yap, Cindy Shuan Ju Teh, Kartini Abdul Jabar, Kwai Lin Thong
Enterococcus faecium is both a commensal of the human intestinal tract and an opportunistic pathogen. The increasing incidence of enterococcal infections is mainly due to the ability of this organism to develop resistance to multiple antibiotics, including vancomycin. The aim of this study was to perform comparative genome analyses on four vancomycin-resistant Enterococcus faecium (VREfm) strains isolated from two fatal cases in a tertiary hospital in Malaysia. Two sequence types, ST80 and ST203, were identified which belong to the clinically important clonal complex (CC) 17...
December 28, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28031673/conservative-treatment-of-an-infected-aortic-graft-with-antibiotic-irrigation
#8
M Akhtar, L Meecham, R Birkett, A D P Pherwani, J F Fairhead
Conservative management of an aortic graft infection is defined as "the nonresectional treatment of an aortic graft that has an established infection." Incidence of aortic graft infections is 0.5 to 5% and the estimated mortality rate from aortic graft infections ranges from 8 to 27%. We present the case of a 73-year-old male patient with an infected abdominal aortic graft following an emergency ruptured abdominal aortic aneurysm repair. Postemergency repair, he developed ischemic colitis with sigmoid colon perforation leading to fecal peritonitis and secondary sepsis...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28031272/polyclonal-emergence-of-vana-vancomycin-resistant-enterococcus-faecium-in-australia
#9
Sebastiaan J van Hal, Björn A Espedido, Geoffrey W Coombs, Benjamin P Howden, Tony M Korman, Graeme R Nimmo, Iain B Gosbell, Slade O Jensen
OBJECTIVES: To investigate the genetic context associated with the emergence of vanA VRE in Australia. METHODS: The whole genomes of 18 randomly selected vanA-positive Enterococcus faecium patient isolates, collected between 2011 and 2013 from hospitals in four Australian capitals, were sequenced and analysed. RESULTS: In silico typing and transposon/plasmid assembly revealed that the sequenced isolates represented (in most cases) different hospital-adapted STs and were associated with a variety of different Tn1546 variants and plasmid backbone structures...
December 28, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28027197/the-effects-of-the-transforming-care-at-the-bedside-program-on-perceived-team-effectiveness-and-patient-outcomes
#10
Mélanie Lavoie-Tremblay, Patricia O'Connor, Alain Biron, Geneviéve L Lavigne, Julie Fréchette, Anaïck Briand
The objective of the study was to document the impact of Transforming Care at the Bedside (TCAB) program on health care team's effectiveness, patient safety, and patient experience. A pretest and posttest (team effectiveness) and a time-series study design (patient experience and safety) were used. The intervention (the TCAB program) was implemented in 8 units in a multihospital academic health science center in Montreal, Quebec, Canada. The impact of TCAB interventions was measured using the Team Effectiveness (TCAB teams, n = 50), and Clostridium difficile-associated diarrhea and vancomycin-resistant Enterobacter rates (patient safety) and Hospital Consumer Assessment of Healthcare Providers and Systems (patient experience; n = 551 patients)...
December 23, 2016: Health Care Manager
https://www.readbyqxmd.com/read/28011602/comparative-effectiveness-and-safety-of-standard-medium-and-high-dose-daptomycin-strategies-for-the-treatment-of-vancomycin-resistant-enterococcal-bacteremia-among-veterans-affairs-patients
#11
Nicholas S Britt, Emily M Potter, Nimish Patel, Molly E Steed
BACKGROUND: Vancomycin-resistant Enterococcus bloodstream infections (VRE-BSI) are associated with significant mortality. Daptomycin exhibits concentration-dependent activity versus VRE in vitro, yet the clinical impact of higher-dose strategies remains unclear. METHODS: We performed a national retrospective cohort study of hospitalized Veterans Affairs patients treated with standard- (6 mg/kg total body weight), medium- (8 mg/kg total body), and high-dose (≥ 10 mg/kg total body weight) daptomycin for VRE-BSI...
December 22, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27994762/bromomethylthioindole-inspired-carbazole-hybrids-as-promising-class-of-anti-mrsa-agents
#12
Chia-Yi Cheng, Chun-Ping Chang, Tsai-Ling Yang Lauderdale, Guann-Yi Yu, Jinq-Chyi Lee, Yi-Wun Jhang, Chien-Huang Wu, Yi-Yu Ke, Amit A Sadani, Ching-Fang Yeh, I-Wen Huang, Yi-Ping Kuo, De-Jiun Tsai, Teng-Kuang Yeh, Chen-Tso Tseng, Jen-Shin Song, Yu-Wei Liu, Lun K Tsou, Kak-Shan Shia
Series of N-substituted carbazole analogues bearing an indole ring were synthesized as anti-methicillin-resistant Staphylococcus aureus (MRSA) agents from a molecular hybridization approach. The representative compound 19 showed an MIC = 1 μg/mL against a panel of MRSA clinical isolates as it possessed comparable in vitro activities to that of vancomycin. Moreover, compound 19 also exhibited MIC = 1 μg/mL activities against a recent identified Z172 MRSA strain (vancomycin-intermediate and daptomycin-nonsusceptible phenotype) and the vancomycin-resistant Enterococcus faecalis (VRE) strain...
December 8, 2016: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27989378/vana-positive-multi-drug-resistant-enterococcus-spp-isolated-from-surfaces-of-a-us-hospital-laundry-facility
#13
K E Michael, D No, M C Roberts
BACKGROUND: Enterococcus spp. are a normal part of the gastrointestinal tract of humans and animals. They are also important pathogens, being responsible for 14% of US nosocomial infections from 2007 to 2010. AIM: To examine a laundry facility that processes clinical linens for the presence and seasonality of vancomycin-resistant Enterococcus spp. METHODS: Surface samples were collected four times in 2015 from the dirty and clean areas of the laundry facility...
October 28, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/27988467/vancomycin-resistant-enterococcus-colonization-does-not-accurately-predict-resistant-enterococcus-infections
#14
Jenna N Dietrich, Brett A Faine, Nicholas M Mohr
No abstract text is available yet for this article.
December 6, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/27943503/invasive-fungal-infection-after-heart-transplantation-a-seven-year-single-center-experience
#15
Ignacio A Echenique, Michael P Angarone, Robert A Gordon, Jonathan Rich, Allen S Anderson, Edwin C McGee, Travis O Abicht, Joseph Kang, Valentina Stosor
BACKGROUND: Invasive fungal infections (IFIs) are an infrequent but major complication of heart-transplantation (HT). We sought to describe the epidemiology at our institution. METHODS: A prospective cohort study of 159 HT recipients was performed from June 2005 to December 2012. IFIs were defined by European Organization for Research and Treatment of Cancer/Mycoses Study Group criteria. RESULTS: By univariate analysis, Hispanic ethnicity/race was associated with IFI (P=0...
December 10, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/27938986/reduction-in-hospital-associated-methicillin-resistant-staphylococcus-aureus-and-vancomycin-resistant-enterococcus-with-daily-chlorhexidine-gluconate-bathing-for-medical-inpatients
#16
Christopher F Lowe, Elisa Lloyd-Smith, Baljinder Sidhu, Gordon Ritchie, Azra Sharma, Willson Jang, Anna Wong, Jennifer Bilawka, Danielle Richards, Thomas Kind, David Puddicombe, Sylvie Champagne, Victor Leung, Marc G Romney
BACKGROUND: Daily bathing with chlorhexidine gluconate (CHG) is increasingly used in intensive care units to prevent hospital-associated infections, but limited evidence exists for noncritical care settings. METHODS: A prospective crossover study was conducted on 4 medical inpatient units in an urban, academic Canadian hospital from May 1, 2014-August 10, 2015. Intervention units used CHG over a 7-month period, including a 1-month wash-in phase, while control units used nonmedicated soap and water bathing...
December 8, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/27925693/identification-of-n-arylated-nh125-analogues-as-rapid-eradicating-agents-against-mrsa-persister-cells-and-potent-biofilm-killers-of-gram-positive-pathogens
#17
Yasmeen Abouelhassan, Akash Basak, Hussain Yousaf, Robert William Huigens Iii
Bacterial biofilms housing dormant persister cells are innately tolerant to antibiotics and disinfectants, yet several membrane-active agents are known to eradicate tolerant bacterial cells. NH125, a membrane-active persister-killer and starting point for development, led to the identification of N-arylated analogues 1 and 2 and displayed improved biofilm-killing potencies and rapid persister-killing activities in stationary cultures of methicillin-resistant Staphylococcus aureus (MRSA). We found 1 and 2 to be superior to other membrane-active agents in biofilm eradication assays with 1 demonstrating minimum biofilm eradication concentrations (MBEC) of 23...
December 7, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/27924114/total-synthesis-of-%C3%A2-naphthacemycin-a9-possessing-both-antibacterial-activity-against-methicillin-resistant-staphylococcus-aureus-and-circumventing-effect-of-%C3%AE-lactam-resistance
#18
Tomoyasu Hirose, Yasuhiro Kojima, Hidehito Matsui, Hideaki Hanaki, Masato Iwatsuki, Kazuro Shiomi, Satoshi Ōmura, Toshiaki Sunazuka
The total synthesis of KB-3346-5A9, named naphthacemycin A9, has been accomplished by combining the Dötz reaction and Suzuki-Miyaura cross coupling as well as employing Friedel-Crafts reaction with dienone-phenol rearrangement as key steps. We also describe the preparation of the simplified tetarimycin A and naphthacemycin A analogs as a model study, which coincidentally reveal unique properties of naturally occurring naphthacene-5,6,11(12H)-trione framework. The synthesized compounds were evaluated for antibacterial activity against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus (VRE) to elucidate their structure-activity relationships (SARs), the results of which agreed with a previously reported preliminary SAR study of tetarimycin A...
December 7, 2016: Journal of Antibiotics
https://www.readbyqxmd.com/read/27915096/universal-contact-precautions-do-not-change-the-prevalence-of-antibiotic-resistant-organisms-in-a-tertiary-burn-unit
#19
Adelyn L Ho, Reid Chambers, Claudia Malic, Anthony Papp
OBJECTIVE: The prevalence of antibiotic-resistant organisms (ARO) in burn units is increasing worldwide and contributes significantly to morbidity and mortality. Study aims are to describe the burden of AROs in burn patients admitted to a tertiary burn unit, to evaluate the impact of contact precautions implemented after an outbreak of antibiotic-resistant Acinetobacter baumannii, and to identify possible predictors of ARO acquisition. METHODS: Data of burn inpatients between 2006 and 2010 were retrospectively reviewed...
November 30, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27905623/-mortality-analysis-of-enterococcus-faecium-bloodstream-infection-in-central-taiwan
#20
Chen Chang-Hua, Lin Li-Chen, Chang Yu-Jun, Chang Chih-Yen
BACKGROUND: Bloodstream infections (BSIs) due to Enterococcus faecium (E. faecium), particularly those due to vancomycin-resistant enterococcus (VRE), are still a therapeutic challenge. AIM: To evaluate mortality from BSI due to E. faecium and VRE in central Taiwan. MATERIALS AND METHODS: We retrospectively analyzed cases of significant E. faecium BSI in the Changhua Christian Hospital System between January 1, 2010 and December 31, 2013. RESULTS: Of the 76 cases, 28 patients (36...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
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