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https://www.readbyqxmd.com/read/28526864/a-broad-spectrum-bactericidal-lipopeptide-with-anti-biofilm-properties
#1
Ohad Meir, Fadia Zaknoon, Uri Cogan, Amram Mor
Previous studies of the oligoacyllysyl (OAK) series acyl-lysyl-lysyl-aminoacyl-lysine-amide, suggested their utility towards generating robust linear lipopeptide-like alternatives to antibiotics, although to date, none exhibited potent broad-spectrum bactericidal activity. To follow up on this premise, we produced a new analog (C14KKc12K) and investigated its properties in various media. Mechanistic studies suggest that C14KKc12K uses a non-specific membrane-disruptive mode of action for rapidly reducing viability of Gram-negative bacteria (GNB) similarly to polymyxin B (PMB), a cyclic lipopeptide used as last resort antibiotic...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526080/post-weaning-diarrhea-in-pigs-risk-factors-and-non-colistin-based-control-strategies
#2
REVIEW
Mohamed Rhouma, John Morris Fairbrother, Francis Beaudry, Ann Letellier
Post-weaning diarrhea (PWD) is one of the most serious threats for the swine industry worldwide. It is commonly associated with the proliferation of enterotoxigenic Escherichia coli in the pig intestine. Colistin, a cationic antibiotic, is widely used in swine for the oral treatment of intestinal infections caused by E. coli, and particularly of PWD. However, despite the effectiveness of this antibiotic in the treatment of PWD, several studies have reported high rates of colistin resistant E. coli in swine...
May 19, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28511265/diagnostic-value-of-diffusion-weighted-mri-for-tumor-characterization-differentiation-and-monitoring-in-pediatric-patients-with-neuroblastic-tumors
#3
Henning Neubauer, Mengxia Li, Verena Rabea Müller, Thomas Pabst, Meinrad Beer
Purpose We explored the diagnostic value of diffusion-weighted MRI (DWI) for tumor characterization, differentiation and therapy monitoring in pediatric patients with extracranial neuroblastic tumors. Materials and Methods All 29 patients (14 girls, median age: 3 years) with neuroblastoma (NB, n = 19), ganglioneuroblastoma (GNB, n = 4) and ganglioneuroma (GN, n = 6) who had had at least one in-house DWI examination since 2005 were identified and retrospectively analyzed. Two independent blinded readers measured ADC values (unit: 10-3 mm(2)/s) and signal intensity ratios (SIRs) of the primary tumor and, if applicable, of the tumor after chemotherapy, metastases and tumor relapse...
May 16, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28508462/role-of-diffusion-weighted-imaging-in-distinguishing-thoracoabdominal-neuroblastic-tumours-of-various-histological-types-and-differentiation-grades
#4
Yang Wen, Yun Peng, Xiao Min Duan, Nan Zhang
INTRODUCTION: Diffusion-weighted MR imaging (DWI) has demonstrated a great potential to help distinguish benign from malignant tumours in paediatric body. Our purpose is to evaluate whether DWI allow discrimination of thoracoabdominal neuroblastic tumours of various histological types and differentiation grades. METHODS: We retrospectively analysed DWI scans of the thoracoabdominal neuroblastic tumours in 25 children (11 girls, 14 boys). DWI was performed with two b-values of 0 and 800 s/mm(2) on a 3...
May 16, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28500792/changing-trends-in-the-aetiology-treatment-and-outcomes-of-bloodstream-infection-occurring-in-the-first-year-after-solid-organ-transplantation-a-single-centre-prospective-cohort-study
#5
Isabel Oriol, Núria Sabé, Antonella F Simonetti, Laura Lladó, Anna Manonelles, Jose González, Fe Tubau, Jordi Carratalà
To analyse trends in the aetiology, treatment and outcomes of BSI within the first year post-transplant over the last 10-year period, we prospectively recorded all episodes of BSI occurring in SOT recipients during the first year post-transplant from 2007 to 2016. Trends of factors were analysed by 2-year periods. Of 475 consecutive episodes of BSI, 218 occurred within a year of SOT in 178 SOT recipients. Gram-positive BSI decreased over time (40.5% to 2.2%). In contrast, there was a steady increase in Gram-negative bacilli (GNB) BSI (54...
May 13, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28485320/aerosolized-amikacin-as-adjunctive-therapy-of-ventilator-associated-pneumonia-caused-by-multidrug-resistant-gram-negative-bacteria-a-single-center-randomized-controlled-trial
#6
Chang Liu, Yu-Ting Zhang, Zhi-Yong Peng, Qing Zhou, Bo Hu, Hui Zhou, Jian-Guo Li
BACKGROUND: Aerosolized amikacin (AA) is a current option for the management of ventilator-associated pneumonia (VAP) caused by multidrug-resistant Gram-negative bacteria (MDR-GNB), as it is reported that AA could increase the alveolar level of the drug without increasing systemic toxicity. This study aimed to evaluate the efficacy and safety of AA as an adjunctive therapy for VAP caused by MDR-GNB. METHODS: In this single-center, double-blind study conducted in a 36-bed general Intensive Care Unit (ICU) in a tertiary hospital from June 2014 to June 2016, 52 ICU patients with confirmed MDR-GNB VAP were randomized to two groups (AA group, n = 27 and placebo group, n = 25)...
May 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28475791/prevention-and-control-of-multidrug-resistant-gram-negative-bacteria-in-adult-intensive-care-units-a-systematic-review-and-network-meta-analysis
#7
Nattawat Teerawattanapong, Kirati Kengkla, Piyameth Dilokthornsakul, Surasak Saokaew, Anucha Apisarnthanarak, Nathorn Chaiyakunapruk
Background: This study evaluated the relative efficacy of strategies for the prevention of multidrug-resistant gram-negative bacteria (MDR-GNB) in adult intensive care units (ICUs). Methods: A systematic review and network meta-analysis was performed; searches of the Cochrane Library, PubMed, Embase, and CINAHL (Cumulative Index to Nursing and Allied Health Literature) included all randomized controlled trials and observational studies conducted in adult patients hospitalized in ICUs and evaluating standard care (STD), antimicrobial stewardship program (ASP), environmental cleaning (ENV), decolonization methods (DCL), or source control (SCT), simultaneously...
May 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28473912/high-burden-of-carbapenem-resistant-enterobacteriaceae-cre-fecal-carriage-at-a-teaching-hospital-cost-effectiveness-of-screening-in-low-resource-setting
#8
Abdul Rahman Zaidah, Nurul Izzah Mohammad, Siti Suraiya, Azian Harun
BACKGROUND: Infections by multidrug-resistant gram-negative bacteria (MDR-GNB) have been continuously growing and pose challenge to health institution globally. Carbapenem-resistant Enterobacteriacea (CRE) was identified as one of the MDR-GNB which has limited treatment options and higher mortality compared to those of sensitive strains. We report an increased burden of CRE fecal carriage at a hospital in the North-eastern region of Malaysia. METHODS: A retrospective descriptive study from August 2013 to December 2015 was conducted in the Medical Microbiology & Parasitology laboratory of Hospital Universiti Sains Malaysia, which is a tertiary teaching hospital with more than 700 beds...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28465480/clinical-and-biological-features-of-neuroblastic-tumors-a-comparison-of-neuroblastoma-and-ganglioneuroblastoma
#9
Wen-Guang He, Yu Yan, Wen Tang, Rong Cai, Gang Ren
Neuroblastoma (NB), ganglioneuroblastoma intermixed (GNBi) and ganglioneuroblastoma nodular (GNBn) are neuroblastic tumors that present with a wide range of symptoms and variable prognoses. We retrospectively reviewed the pretreatment clinical (age, sex and tumor stage) and biological (MYCN amplification; and levels of lactate dehydrogenase, ferritin and neuron-specific enolase) characteristics of 279 patients who were diagnosed with pathologically confirmed NB and GNB from January 2005 to December 2015. The median age at diagnosis increased with grade of differentiation (NB: 28...
April 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28456321/prevalence-of-multidrug-resistant-gram-negative-bacteria-among-nursing-home-residents-a-systematic-review-and-meta-analysis
#10
Sainfer Aliyu, Arlene Smaldone, Elaine Larson
BACKGROUND: Multidrug-resistant gram-negative bacteria (MDR-GNB) are associated with an increasing proportion of infections among nursing home (NH) residents. The objective of this systematic review and meta-analysis was to critically review evidence of the prevalence of MDR-GNB among NH residents. METHODS: Following Meta-Analysis of Observational Studies in Epidemiology guidelines, a systematic review of literature for the years 2005-2016 using multiple databases was conducted...
May 1, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28435019/epidemiology-and-trends-in-the-antibiotic-susceptibilities-of-gram-negative-bacilli-isolated-from-patients-with-intra-abdominal-infections-in-the-asia-pacific-region-2010-2013
#11
Ya-Ting Chang, Geoffrey Coombs, Thomas Ling, V Balaji, Camilla Rodrigues, Hiroshige Mikamo, Min-Ja Kim, Datin Ganeswrie Rajasekaram, Myrna Mendoza, Thean Yen Tan, Pattarachai Kiratisin, Yuxing Ni, Weinman Barry, Yingchun Xu, Yen-Hsu Chen, Po-Ren Hsueh
This study was conducted to investigate the epidemiology and antimicrobial susceptibility patterns of Gram-negative bacilli (GNB) isolated from intra-abdominal infections (IAIs) in the Asia-Pacific region (APR) from 2010-2013. A total of 17 350 isolates were collected from 54 centres in 13 countries in the APR. The three most commonly isolated GNB were Escherichia coli (46.1%), Klebsiella pneumoniae (19.3%) and Pseudomonas aeruginosa (9.8%). Overall, the rates of extended-spectrum β-lactamase (ESBL)-producing E...
June 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28407806/development-and-validation-of-classifiers-and-variable-subsets-for-predicting-nursing-home-admission
#12
Mikko Nuutinen, Riikka-Leena Leskelä, Ella Suojalehto, Anniina Tirronen, Vesa Komssi
BACKGROUND: In previous years a substantial number of studies have identified statistically important predictors of nursing home admission (NHA). However, as far as we know, the analyses have been done at the population-level. No prior research has analysed the prediction accuracy of a NHA model for individuals. METHODS: This study is an analysis of 3056 longer-term home care customers in the city of Tampere, Finland. Data were collected from the records of social and health service usage and RAI-HC (Resident Assessment Instrument - Home Care) assessment system during January 2011 and September 2015...
April 13, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28402500/evaluation-of-the-aid-carbapenemase-line-probe-assay-for-rapid-detection-and-identification-of-carbapenemase-genes-in-gram-negative-bacilli
#13
Guido V Bloemberg, Andrea Braun-Kiewnick, Jan Tedrup, Carla Meijerink, Elena Durer, Claudia Ritter, Peter M Keller, Michael Hombach
Objectives: This study evaluated the AID carbapenemase line probe assay (LPA) for the detection and identification of carbapenem resistance genes in Enterobacteriaceae and other Gram-negative bacilli (GNB) using bacterial cultures and DNA extracts directly from patient urine samples. Methods: The AID carbapenemase LPA detects 13 different carbapenemase genes. Test probe accuracy was verified for using clinical Enterobacteriaceae isolates harbouring bla KPC , bla VIM , bla NDM , bla GIM , bla AIM , bla SPM , bla IMP and bla OXA-48 and a well-characterized set of Escherichia coli DH5α strains transformed with the vector plasmid pUC57- kan harbouring bla BIC , bla SIM , bla DIM , bla IMI-3 , bla IMI-1 and bla NMC-A ...
April 11, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28396277/duodenoscope-reprocessing-surveillance-with-adenosine-triphosphate-testing-and-terminal-cultures-a-clinical-pilot-study
#14
Kavel Visrodia, Yuri Hanada, Kelly M Pennington, Pritish K Tosh, Mark D Topazian, Bret T Petersen
BACKGROUND & AIMS: Recent reports of infectious outbreaks linked to duodenoscopes have led to proposals for duodenoscope surveillance culturing, which has inherent limitations. We aimed to assess the feasibility of real-time adenosine triphosphate (ATP) testing after manual cleaning, and its ability to predict reprocessing adequacy, as determined by terminal duodenoscope cultures. METHODS: Clinically used duodenoscopes underwent reprocessing per current guidelines...
April 7, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28394975/-risk-factors-for-acute-kidney-injury-in-patients-treated-with-polymyxin-b-experience-from-139-cases-at-a-tertiary-university-hospital-in-colombia
#15
Johanna Osorio, Jackeline Barreto, Claudia F Samboni, Lina A Cándelo, Luis C Álvarez, Susana Benavidez, Roso P Téllez, Dagoberto Santofimio, Jorge A Ramos, Carlos A Gómez
BACKGROUND: The rise of infections caused by multidrug-resistant Gram negative bacilli (MDR-GNB), added to paucity of newer therapy, have led to increase polymyxin B use, despite adverse renal toxicity profile. AIM: To determine the incidence and risk factors associated to acute kidney injury (AKI) and polymyxin B use, in patients with infections caused by MDR-GNB. METHODS: A retrospective cohort, with a nested case-control study of adults who received polymyxin B for more than 48 hours at a tertiary university hospital in Colombia (2011-2015) was performed...
February 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28385464/microbiology-of-surgical-site-infections-in-patients-with-cancer-a-7-year-review
#16
Juan Carlos Hernaiz-Leonardo, Maria Fernanda Golzarri, Patricia Cornejo-Juárez, Patricia Volkow, Consuelo Velázquez, Mauricio Ostrosky-Frid, Diana Vilar-Compte
BACKGROUND: Health care-associated infections (HAIs) have arisen as major sources of multidrug-resistant bacteria. Surgical site infections (SSIs) are the most frequent HAIs in many countries, with high antimicrobial-resistant prevalence. METHODS: A 7-year retrospective review (2008-2014) of microbiologic data within a prospective surveillance program on patients with SSI at a cancer hospital in Mexico. RESULTS: There were 23,421 surgeries performed during the study period...
April 3, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28384858/antimicrobial-resistance-surveillance-among-intensive-care-units-of-a-tertiary-care-hospital-in-southern-india
#17
Kailash Moolchandani, Apurba Sankar Sastry, R Deepashree, Sujatha Sistla, B N Harish, Jharna Mandal
INTRODUCTION: Hospital Acquired Infections (HAIs) are the rising threat in the health care facilities across the globe. As most Intesive Care Unit (ICU) patients are frequently on broad spectrum antimicrobials, this induces selective antibiotic pressure which leads to development of Antimicrobial Resistance (AMR) among the microorganisms of ICUs. AIM: To study the occurrence of different types of HAIs in patients admitted to various ICUs of JIPMER and the AMR pattern of the bacterial pathogens isolated from them...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28383604/microbiological-contamination-in-digital-radiography-evaluation-at-the-radiology-clinic-of-an-educational-institution
#18
Cristiana P Malta, Naiana Nl Damasceno, Rosangela A Ribeiro, Carolina Sf Silva, Karina L Devito
The aim of this study was to evaluate the contamination rate of intra and extraoral digital X ray equipment in a dental radiology clinic at a public educational institution. Samples were collected on three different days, at two times in the day: in the morning, before attending patients, and at the end of the day, after appointment hours and before cleaning and disinfection procedures. Samples were collected from the periapical X-ray machine (tube head, positioning device, control panel and activator button), the panoramic X- ray machine (temporal support, bite block, control panel and activator button), the intraoral digital system (sensor), and the digital system computers (keyboard and mouse)...
December 2016: Acta Odontológica Latinoamericana: AOL
https://www.readbyqxmd.com/read/28375512/the-epidemiology-of-carbapenem-resistant-enterobacteriaceae-the-impact-and-evolution-of-a-global-menace
#19
REVIEW
Latania K Logan, Robert A Weinstein
Carbapenem-resistant Enterobacteriaceae (CRE) are a serious public health threat. Infections due to these organisms are associated with significant morbidity and mortality. Mechanisms of drug resistance in gram-negative bacteria (GNB) are numerous; β-lactamase genes carried on mobile genetic elements are a key mechanism for the rapid spread of antibiotic-resistant GNB worldwide. Transmissible carbapenem-resistance in Enterobacteriaceae has been recognized for the last 2 decades, but global dissemination of carbapenemase-producing Enterobacteriaceae (CPE) is a more recent problem that, once initiated, has been occurring at an alarming pace...
February 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28367020/comparison-of-four-phenotypic-methods-for-detection-of-metallo-%C3%AE-lactamase-producing-gram-negative-bacteria-in-rural-teaching-hospital
#20
Chinjal A Panchal, Sweta Sunil Oza, Sanjay J Mehta
CONTEXT: Metallo-β-lactamase (MBL)-producing bacteria lead to resistance to carbapenem an antibiotic that used as the last resort for treatment of multidrug-resistant bacteria, extended spectrum beta-lactamases, and AmpC β-lactamase-producing Gram-negative bacteria (GNB). The emergence of MBL-producing GNB is challenge to microbiology laboratories because there are no standardized guidelines available to detect them. The aim of this study was to compare four phenotypic methods to detect MBL production in GNB and to determine antibiotic sensitivity of MBL-producing isolates...
April 2017: Journal of Laboratory Physicians
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