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https://www.readbyqxmd.com/read/28205160/non-fermentative-gram-negative-rods-bacteremia-in-children-with-cancer-a-14-year-single-center-experience
#1
D Averbuch, C Avaky, M Harit, P Stepensky, I Fried, T Ben-Ami, V Temper, Y Peled, H Troen, R Masarwa, W Abu Ahmad, M Weintraub, S Revel-Vilk, D Engelhard
PURPOSE: Data on non-fermentative Gram-negative rods (NFGNR) bacteremia in children with malignancies are limited. The aim of this study was to present clinical picture, antimicrobial susceptibility pattern, risk factors for resistance and outcome in NFGNR bacteremia in children with cancer. METHODS: All episodes of NFGNR bacteremia occurring during 2001-2014 in children with cancer in a tertiary-care hospital were retrospectively analyzed. Pseudomonas and Acinetobacter spp...
February 15, 2017: Infection
https://www.readbyqxmd.com/read/28201974/mur-ligase-inhibitors-as-anti-bacterials-a-comprehensive-review
#2
Jaiprakash N Sangshetti, Suyog S Joshi, Rajendra H Patil, Devanand B Shinde
Exploring a new target for antibacterial drug discovery has gained much attention because of the emergence of Multidrug Resistance (MDR) strains of bacteria. To overcome this problem the development of novel antibacterial was considered as highest priority task and was one of the biggest challenges since multiple factors were involved. The bacterial peptidoglycan biosynthetic pathway has been well documented in the last few years and has been found to be an imperative source for the development of novel antibacterial agents with high target specificity as they are essential for bacterial survival and have no homologs in humans...
February 14, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28198662/changes-in-bacterial-epidemiology-and-antibiotic-resistance-among-veterans-with-spinal-cord-injury-disorder-over-the-past-9-years
#3
Margaret A Fitzpatrick, Katie J Suda, Nasia Safdar, Stephen P Burns, Makoto M Jones, Linda Poggensee, Swetha Ramanathan, Charlesnika T Evans
OBJECTIVE: Patients with spinal cord injury and disorder (SCI/D) have an increased risk of infection with multidrug-resistant (MDR) bacteria. We described bacterial epidemiology and resistance in patients with SCI/D at Veterans Affairs Medical Centers (VAMCs) for the past 9 years. DESIGN: Retrospective cohort Setting: One hundred thirty VAMCs. PARTICIPANTS: Veterans with SCI/D and bacterial cultures with antibiotic susceptibility testing performed between 1/1/2005-12/31/2013...
February 15, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28196696/patients-hospitalized-abroad-as-importers-of-multiresistant-bacteria-a-cross-sectional-study
#4
Tamim Khawaja, Juha Kirveskari, Sara Johansson, Juuso Väisänen, Aurora Djupsjöbacka, Annika Nevalainen, Anu Kantele
OBJECTIVES: The pandemic spread of multidrug-resistant (MDR) bacteria poses a threat to healthcare worldwide, with highest prevalence in indigent regions of the (sub)tropics. As hospitalization constitutes a major risk factor for colonization, infection control management in low-prevalence countries urgently needs background data on patients hospitalized abroad. METHODS: We collected data on 1122 patients who, after hospitalization abroad, were treated at the Helsinki University Hospital between 2010 and 2013...
February 11, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28193899/structure-of-a-lipid-a-phosphoethanolamine-transferase-suggests-how-conformational-changes-govern-substrate-binding
#5
Anandhi Anandan, Genevieve L Evans, Karmen Condic-Jurkic, Megan L O'Mara, Constance M John, Nancy J Phillips, Gary A Jarvis, Siobhan S Wills, Keith A Stubbs, Isabel Moraes, Charlene M Kahler, Alice Vrielink
Multidrug-resistant (MDR) gram-negative bacteria have increased the prevalence of fatal sepsis in modern times. Colistin is a cationic antimicrobial peptide (CAMP) antibiotic that permeabilizes the bacterial outer membrane (OM) and has been used to treat these infections. The OM outer leaflet is comprised of endotoxin containing lipid A, which can be modified to increase resistance to CAMPs and prevent clearance by the innate immune response. One type of lipid A modification involves the addition of phosphoethanolamine to the 1 and 4' headgroup positions by phosphoethanolamine transferases...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28178922/risk-factors-for-excessively-prolonged-meropenem-use-in-the-intensive-care-setting-a-case-contol-study
#6
Juri Katchanov, Benno Kreuels, Florian P Maurer, Kai Wöstmann, Johannes Jochum, Christina König, Kariem Seoudy, Holger Rohde, Ansgar W Lohse, Dominic Wichmann, Michael Baehr, Camilla Rothe, Stefan Kluge
BACKGROUND: Inappropriate use of broad-spectrum antimicrobials affects adversely both the individual patient and the general public. The aim of the study was to identify patients at risk for excessively prolonged carbapenem treatment in the ICU as a target for antimicrobial stewardship interventions. METHODS: Case-control study in a network of 11 ICUs of a university hospital. Patients with uninterrupted meropenem therapy (MT) > 4 weeks were compared to controls...
February 8, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28174100/a-traceless-reversible-polymeric-colistin-prodrug-to-combat-multidrug-resistant-mdr-gram-negative-bacteria
#7
Chongyu Zhu, Elena K Schneider, Jiping Wang, Kristian Kempe, Paul Wilson, Tony Velkov, Jian Li, Thomas P Davis, Michael R Whittaker, David M Haddleton
Colistin methanesulfonate (CMS) is the only prodrug of colistin available for clinical use for the treatment of infections caused by multidrug-resistant (MDR) Gram-negative bacteria. Owing to its slow and variable release, an alternative is urgently required to improve effectiveness. Herein we describe a PEGylated colistin prodrug whereby the PEG is attached via a cleavable linker (col-aaPEG) introducing an acetic acid terminated poly (ethylene glycol) methyl ether (aaPEG) onto the Thr residue of colistin. Due to the labile ester containing link, this prodrug is converted back into active colistin in vitro within 24h...
February 5, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28167307/fosfomycin-in-vitro-efficacy-against-multidrug-resistant-isolates-beyond-urinary-isolates
#8
Tulin Demir, Tuncay Buyukguclu
OBJECTIVES: Fosfomycin (FOF) is a bactericidal antimicrobial agent active against a range of Gram-negative bacteria, including multidrug-resistant (MDR) and metallo-β-lactamase (MBL)-producing Enterobacteriaceae. However, data are scarce regarding use of the drug beyond urinary tract infections (UTIs). METHODS: In this study, susceptibility rates to FOF among 290 MDR Enterobacteriaceae isolates were analysed by gradient and disk diffusion tests and the results were compared with agar dilution according to the Clinical and Laboratory Standards Institute (CLSI)...
February 3, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28162982/revival-of-old-antibiotics-needs-the-state-of-evidence-and-expectations
#9
Hiba Zayyad, Noa Eliakim-Raz, Leonard Leibovici, Mical Paul
The gap between the emergence of antibiotic resistance and new antibiotic development has drawn attention to old antibiotics whose spectrum of coverage frequently comprises highly resistant bacteria. However, these antibiotics have frequently not undergone the structured process of antibiotic development of modern antibiotics, from pharmacokinetic/pharmacodynamic (PK/PD) studies establishing safe and effective dosing, establishment of susceptibility breakpoints, to clinical trials establishing clinical safety and effectiveness...
February 2, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28160952/antibiotic-trends-amid-multidrug-resistant-gram-negative-infections-in-intensive-care-units
#10
REVIEW
Leanne H Fowler, Susan Lee
Isolates from ICUs most commonly find multidrug-resistant (MDR) gram-negative bacteria. The purpose of this article is to discuss the significant impact MDR gram-negative infections are having on ICUs, the threat on health and mortality, and effective and new approaches aimed to combat MDR gram-negative infections in critically ill populations. Inappropriate antibiotic therapies for suspected or documented infections are the leading cause of the emergence of bacterial resistance. A variety of strategies are aimed at combatting this international burden via antibiotic stewardship programs...
March 2017: Critical Care Nursing Clinics of North America
https://www.readbyqxmd.com/read/28160023/the-intensive-care-medicine-research-agenda-on-multidrug-resistant-bacteria-antibiotics-and-stewardship
#11
REVIEW
Marin H Kollef, Matteo Bassetti, Bruno Francois, Jason Burnham, George Dimopoulos, Jose Garnacho-Montero, Jeffrey Lipman, Charles-Edouard Luyt, David P Nicolau, Maarten J Postma, Antonio Torres, Tobias Welte, Richard G Wunderink
PURPOSE: To concisely describe the current standards of care, major recent advances, common beliefs that have been contradicted by recent trials, areas of uncertainty, and clinical studies that need to be performed over the next decade and their expected outcomes with regard to the management of multidrug-resistant (MDR) bacteria, antibiotic use, and antimicrobial stewardship in the intensive care unit (ICU) setting. METHODS: Narrative review based on a systematic analysis of the medical literature, national and international guidelines, and expert opinion...
February 4, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28153582/changing-trends-in-antimicrobial-susceptibility-pattern-of-bacterial-isolates-in-a-burn-unit
#12
Narendra Pal Singh, Mayuri Rani, Kavita Gupta, Tanu Sagar, Iqbal Rajinder Kaur
INTRODUCTION: Emerging antimicrobial resistance in nosocomial bacterial isolates, limits the available treatment options for burn wound infections, among them multi-drug resistant Gram negative bacteria and methicillin-resistant Staphylococcus aureus (MRSA) are major contributors to the increase in morbidity and mortality rates. MATERIAL AND METHODS: A retrospective cross-sectional study was done in the Department of Microbiology, University College of Medical Sciences & Guru Teg Bahadur Hospital, Delhi...
January 30, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28150578/resistotyping-phenotyping-and-genotyping-of-new-delhi-metallo-%C3%AE-lactamase-ndm-among-gram-negative-bacilli-from-iranian-patients
#13
Dariush Shokri, Mohammad Rabbani Khorasgani, Seyed Masih Fatemi, Abbas Soleimani-Delfan
PURPOSE: The purpose of this study was investigation of New Delhi metallo-β-lactamase (NDM) production among gram negative bacilli. METHODOLOGY: Antibiogram-Resistotyping and detection of NDM in clinical isolates of Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa and comparative evaluation of the diagnostic performance of three phenotypic methods for NDM detection considering PCR as gold standard were performed. Minimum Inhibitory Concentration (MIC) of antibiotics against NDM positive strains by E-test and clonal relationship analysis using Enterobacterial Repetitive Intergenic Consensus Polymerase Chain Reaction (ERIC-PCR) in these strains were determined...
February 1, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28139466/one-pot-synthesis-of-multifunctional-nanoscale-metal-organic-frameworks-as-an-effective-antibacterial-agent-against-multidrug-resistant-staphylococcus-aureus
#14
Angshuman Ray Chowdhuri, Balaram Das, Amit Kumar, Satyajit Tripathy, Somenath Roy, Sumanta Kumar Sahu
Drug-resistant bacteria are an increasingly serious threat to global public health. In particular, infections from multidrug-resistant (MDR) Gram-positive bacteria (i.e. Staphylococcus aureus) are growing global health concerns. In this work, we report the first use of nanoscale metal-organic frameworks (NMOFs) coencapsulating an antibiotic (vancomycin) and targeting ligand (folic acid) in one pot to enhance therapeutic efficacy against MDR S. aureus. Zeolitic imidazolate framework (ZIF-8) NMOFs, which have globular morphologies coencapsulating vancomycin and folic acid, are characterized by transmission electron microscopy, field-emission scanning electron microscopy, powder x-ray diffraction, ulltraviolet-visible spectroscopy, and dynamic light-scattering techniques...
March 3, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28138372/ethnomedicinal-cichorium-intybus-seed-extracts-an-impending-preparation-against-multidrug-resistant-bacterial-pathogens
#15
Hazir Rahman, Usman Ali Khan, Muhammad Qasim, Noor Muhammad, Muhammad Daud Khan, Muhammad Asif, Azizullah Azizullah, Muhammad Adnan, Waheed Murad
BACKGROUND: The present study was undertaken to analyze the phytochemical content and biological activity of Cichorium intybus seeds traditionally used in Charsadda, Pakistan against multidrug resistant (MDR) bacterial pathogens. OBJECTIVES: This study explored the qualitative and quantitative antibacterial potential of C. intybus. Further qualitative analysis of phytochemical content was performed. METHODS: Cichorium intybus seed extracts were prepared in aqueous, chloroform, ethanol, and hexane separately...
November 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/28137796/evaluation-of-a-lamp-based-assay-for-the-rapid-detection-of-plasmid-encoded-colistin-resistance-gene-mcr-1-in-enterobacteriaceae-isolates
#16
Can Imirzalioglu, Linda Falgenhauer, Judith Schmiedel, Said-Elias Waezsada, Konrad Gwozdzinski, Nicole Roschanski, Uwe Roesler, Lothar Kreienbrock, Arthur P Schiffmann, Alexandra Irrgang, Annemarie Käsbohrer, Rolf Bauerfeind, Eugen Domann, Trinad Chakraborty
Colistin, which belongs to the class of polypeptide antibiotics known as polymyxins, is a 'last-resort' antibiotic often used for treatment of patients infected with extensively multidrug-resistant (MDR) bacteria such as carbapenem-resistant Enterobacteriaceae….
January 30, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28134321/rapid-sputum-multiplex-detection-of-the-m-tuberculosis-complex-mtbc-and-resistance-mutations-for-eight-antibiotics-by-nucleotide-maldi-tof-ms
#17
Kang-Yi Su, Bo-Shiun Yan, Hao-Chieh Chiu, Chong-Jen Yu, So-Yi Chang, Ruwen Jou, Jia-Long Liu, Po-Ren Hsueh, Sung-Liang Yu
The increasing incidence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis (MTB) adds further urgency for rapid and multiplex molecular testing to identify the MTB complex and drug susceptibility directly from sputum for disease control. A nucleotide matrix-assisted-laser-desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS)-based assay was developed to identify MTB (MTBID panel) and 45 chromosomal mutations for resistance to eight antibiotics (MTBDR panel)...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28130072/old-antibiotics-for-multidrug-resistant-pathogens-from-in-vitro-activity-to-clinical-outcomes
#18
Keith S Kaye, Ana C Gales, Grégory Dubourg
Antimicrobial resistance is a major and emerging threat worldwide. New antimicrobials have been unable to meet the resistance challenge, and treatment options are limited for a growing number of resistant pathogens. More and more clinicians are relying on older antimicrobials for the treatment of multidrug-resistant (MDR) bacteria. Some older antimicrobials have maintained excellent in vitro activity against highly resistant pathogens. In some instances, use of older agents is limited by unfavourable pharmacokinetic/pharmacodynamic characteristics and/or toxicities...
January 24, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28128096/validation-of-a-colistin-plasma-concentration-breakpoint-as-a-predictor-of-nephrotoxicity-in-patients-treated-with-colistin-methanesulfonate
#19
Juan P Horcajada, Luisa Sorlí, Sonia Luque, Natividad Benito, Concepción Segura, Nuria Campillo, Milagro Montero, Erika Esteve, Beatriz Mirelis, Virginia Pomar, Jordi Cuquet, Carmina Martí, Pau Garro, Santiago Grau
Nephrotoxicity limits the effective use of colistin for the treatment of multidrug-resistant Gram-negative bacteria (MDR-GNB) infections. We previously defined a steady-state colistin plasma concentration (Css) of 2.42 mg/L that predicted nephrotoxicity at end of treatment (EOT). The objective of this study was to validate this breakpoint in a prospective cohort. This was a multicentre, prospective, observational study conducted at three hospitals with a cohort of patients treated for MDR-GNB infection with colistin methanesulfonate from September 2011 until January 2015...
December 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28124613/harmaline-and-its-derivatives-against-the-infectious-multi-drug-resistant-escherichia-coli
#20
Hina Siddiqui, Sehar Tasneem, Saba Farooq, Amtul Sami, Atta-Ur-Rahman, Muhammad Iqbal Choudhary
Background Multidrug resistance (MDR) is a major challenge in the treatment of infectious diseases. The MDR in urinary tract infection causing bacteria, such as Escherichia coli, has made treatment of UTI very difficult. Objective The aims of the current study were to synthesize a library of harmaline derivatives, and to evaluate their activity against various strains of multi-drug resistance (MDR) E. coli. Method Harmaline derivatives were synthesized by the reaction of harmaline (1) with various acid halides and anhydrides...
January 25, 2017: Medicinal Chemistry
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