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https://www.readbyqxmd.com/read/29051750/epidemiology-of-extended-spectrum-%C3%AE-lactamase-producing-e-coli-and-vancomycin-resistant-enterococci-in-the-northern-dutch-german-cross-border-region
#1
Xuewei Zhou, Silvia García-Cobos, Gijs J H M Ruijs, Greetje A Kampinga, Jan P Arends, Dirk M Borst, Lieke V Möller, Nicole D Holman, Theo A Schuurs, Lesla E Bruijnesteijn van Coppenraet, Jan F Weel, Jan H van Zeijl, Robin Köck, John W A Rossen, Alexander W Friedrich
Objectives: To reveal the prevalence and epidemiology of extended-spectrum β-lactamase (ESBL)- and/or plasmid AmpC (pAmpC)- and carbapenemase (CP) producing Enterobacteriaceae and vancomycin-resistant enterococci (VRE) across the Northern Dutch-German border region. Methods: A point-prevalence study on ESBL/pAmpC/CP producing Enterobacteriaceae and VRE was carried out in hospitalized patients in the Northern Netherlands (n = 445, 2012-2013) and Germany (n = 242, 2012). Healthy individuals from the Dutch community (n = 400, 2010-2012) were also screened...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29046783/phenotypic-and-genotypic-characteristics-of-esbl-and-ampc-producing-organisms-associated-with-bacteraemia-in-ho-chi-minh-city-vietnam
#2
Nguyen Phu Huong Lan, Nguyen Huu Hien, Tu Le Thi Phuong, Duy Pham Thanh, Nga Tran Vu Thieu, Dung Tran Thi Ngoc, Ha Thanh Tuyen, Phat Voong Vinh, Matthew J Ellington, Guy E Thwaites, Nguyen Van Vinh Chau, Stephen Baker, Christine J Boinett
BACKGROUND: Broad-spectrum antimicrobials are commonly used as empirical therapy for infections of presumed bacterial origin. Increasing resistance to these antimicrobial agents has prompted the need for alternative therapies and more effective surveillance. Better surveillance leads to more informed and improved delivery of therapeutic interventions, potentially leading to better treatment outcomes. METHODS: We screened 1017 Gram negative bacteria (excluding Pseudomonas spp...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29046407/an-improved-esbl-detection-test-utilizing-aztreonam-clavulanate
#3
Gina K Thomson, Maaz Ayaz, Kelli Lutes, Kenneth S Thomson
Clinical laboratories test for ESBLs for epidemiological and infection control purposes and also for potential to cause therapeutic failures with cephalosporins. Testing can be problematic because the CLSI does not recommend testing of all producers of ESBLs and also falsely negative results may occur with isolates that co-produce AmpC. Boronic acid supplemented tests can enhance ESBL detection in AmpC producers. Because aztreonam inhibits AmpCs, a study was designed to compare ESBL detection by the CLSI disk test (CLSI), a boronic acid supplemented CLSI disk test (CLSI + BA), and an aztreonam + clavulanate disk test (ATM + CA)...
October 18, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29042339/clonal-dissemination-of-oxa-48-producing-enterobacter-cloacae-isolated-from-companion-animals-in-algeria
#4
Massilia Yousfi, Abdelaziz Touati, Anaelle Muggeo, Brazane Mira, Asma Bourouis, Lucien Brasme, Thomas Guillard, Christophe de Champs
OBJECTIVES: The aim of this study was to investigate carbapenemase-producing Enterobacteriaceae (CPE) in companion animals. METHODS: Between October 2015 and April 2016, 533 rectal swabs were obtained from healthy and diseased pets in different cities in Algeria. Samples collected were plated on MacConkey agar supplemented with ertapenem (0.5mg/L). The isolates were identified by MALDI-TOF mass spectroscopy. Antimicrobial susceptibility testing was performed using disk diffusion method...
October 14, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29033110/investigating-of-four-main-carbapenem-resistance-mechanisms-in-high-level-carbapenem-resistant-pseudomonas-aeruginosa-isolated-from-burn-patients
#5
Soodabeh Rostami, Ahmad Farajzadeh Sheikh, Saeed Shoja, Abbas Farahani, Mohammad Amin Tabatabaiefar, Abbas Jolodar, Raheleh Sheikhi
BACKGROUND: Pseudomonas aeruginosa is an opportunistic pathogen involved in many infections. Carbapenem-resistant P.aeruginosa has emerged as an important cause of infection in different hospitals worldwide. We aimed to determine frequencies of the four main resistance mechanisms [metallo-beta lactamase (MBL) production (blaIMP, blaVIM, blaSPM and blaNDM), overproduction of the MexAB-OprM and MexXY efflux pumps, overproduction of chromosome-encoded AmpC β-lactamase, and reduced OprD expression] in high-level carbapenem-resistant P...
October 9, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29031525/impact-of-clsi-and-eucast-cefepime-breakpoint-changes-on-the-susceptibility-reporting-for-enterobacteriaceae
#6
Jacqueline T Bork, Emily L Heil, Surbhi Leekha, Randal C Fowler, Nancy D Hanson, Anjali Majumdar, J Kristie Johnson
OBJECTIVE: We analyzed the effects of different cefepime MIC breakpoints on Enterobacteriaceae cefepime susceptibility and the presence of AmpC and extended-spectrum β-lactamase (ESBL) genes within the cefepime MIC interpretative categories. METHODS: Using Enterobacteriaceae susceptibility data from 2013 comparisons of MIC breakpoints were performed using Pearson's chi-squared test. Molecular testing on a subset of isolates was done. RESULTS: Among 3784 non-duplicate clinical isolates, cefepime susceptibility decreased from 97...
October 11, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29031106/new-insights-into-resistance-to-colistin-and-third-generation-cephalosporins-of-escherichia-coli-in-poultry-portugal-novel-blactx-m-166-and-blaesac-genes
#7
Vera Manageiro, Lurdes Clemente, Rafael Graça, Ivone Correia, Teresa Albuquerque, Eugénia Ferreira, Manuela Caniça
The increasing incidence of intestinal colonization with extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae and Gram negative organisms that has been observed in food animals such as poultry, cattle and pigs, are suggestive that animals, food and environment are potential sources of ESBL-producing bacteria. Hence, the aim of this study was to characterized commensal E. coli obtained from healthy broiler and turkey flocks at slaughter for the presence of penicillinases-, ESBL-, extended-spectrum AmpC (ESAC)-, plasmid-mediated quinolone resistance- and MCR-encoding genes...
October 4, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29021974/role-of-low-molecular-mass-penicillin-binding-proteins-nagz-and-ampr-in-ampc-%C3%AE-lactamase-regulation-of-yersinia-enterocolitica
#8
Chang Liu, Chuchu Li, Yuhuang Chen, Huijing Hao, Junrong Liang, Ran Duan, Zhaoke Guo, Jing Zhang, Zhongzhi Zhao, Huaiqi Jing, Xin Wang, Shihe Shao
Yersinia enterocolitica encodes a chromosomal AmpC β-lactamase under the regulation of the classical ampR-ampC system. To obtain a further understanding to the role of low-molecular-mass penicillin-binding proteins (LMM PBPs) including PBP4, PBP5, PBP6, and PBP7, as well as NagZ and AmpR in ampC regulation of Y. enterocolitica, series of single/multiple mutant strains were systematically constructed and the ampC expression levels were determined by luxCDABE reporter system, reverse transcription-PCR (RT-PCR) and β-lactamase activity test...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29017262/ceftolozane-tazobactam-for-the-treatment-of-multidrug-resistant-pseudomonas-aeruginosa-infections-clinical-effectiveness-and-evolution-of-resistance
#9
Ghady Haidar, Nathan J Philips, Ryan K Shields, Daniel Snyder, Shaoji Cheng, Brian A Potoski, Yohei Doi, Binghua Hao, Ellen G Press, Vaughn S Cooper, Cornelius J Clancy, M Hong Nguyen
Background: Data on the use of ceftolozane-tazobactam and emergence of ceftolozane-tazobactam resistance during multidrug resistant (MDR)-Pseudomonas aeruginosa infections are limited. Methods: We performed a retrospective study of 21 patients treated with ceftolozane-tazobactam for MDR-P. aeruginosa infections. Whole genome sequencing and quantitative real-time polymerase chain reaction were performed on longitudinal isolates. Results: Median age was 58 years; 9 patients (43%) were transplant recipients...
July 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28994446/colonization-of-residents-and-staff-of-an-italian-long-term-care-facility-and-an-adjacent-acute-care-hospital-geriatric-unit-by-multidrug-resistant-bacteria
#10
Albert March, Richard Aschbacher, Ferisa Sleghel, Gertrud Soelva, Malgorzata Kaczor, Roberta Migliavacca, Aurora Piazza, Vittoria Mattioni Marchetti, Laura Pagani, Katia Scalzo, Valentina Pasquetto, Elisabetta Pagani
In 2016, we undertook a point prevalence screening study for Enterobacteriaceae with extended-spectrum β-lactamases (ESBLs), high-level AmpC cephalosporinases and carbapenemases, and also methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin resistant enterococci (VRE) in a long-term care facility (LTCF) and the associated acute care hospital geriatric unit in Bolzano, Northern Italy. Urine samples and rectal, inguinal, oropharyngeal and nasal swabs were plated on selective agars. Demographic data were collected...
October 10, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28992919/genotypic-and-epidemiologic-characterization-of-extended-spectrum-cephalosporin-resistant-salmonella-enterica-from-us-beef-feedlots
#11
D F Mollenkopf, D A Mathys, D A Dargatz, M M Erdman, G G Habing, J B Daniels, T E Wittum
In the US, nontyphoidal Salmonellae are a common foodborne zoonotic pathogen causing gastroenteritis. Invasive Salmonella infections caused by extended-spectrum cephalosporin resistant (ESCR) phenotypes are more likely to result in treatment failure and adverse health outcomes, especially in severe pediatric Salmonella infections where the extended-spectrum β-lactams are the therapy of choice. To examine the genetic and epidemiologic characteristics of ESCR Salmonellae which may enter the food chain, we characterized 44 ceftiofur-resistant Salmonella isolates from the National Animal Health Monitoring System (NAHMS) 2011 beef cattle feedlot health and management study...
October 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28990132/oxa-48-like-carbapenemases-producing-enterobacteriaceae-in-different-niches
#12
REVIEW
Assia Mairi, Alix Pantel, Albert Sotto, Jean-Philippe Lavigne, Aziz Touati
The emergence of carbapenem-resistant enterobacterial species poses a serious threat to public health worldwide. OXA-48-type carbapenem-hydrolyzing class D β-lactamases are widely distributed among Enterobacteriaceae, with significant geographical differences. To date, 11 OXA-48-like variants have been identified, with classical OXA-48 being the most widespread. These enzymes show high-level hydrolytic activity against penicillins and low-level hydrolysis towards carbapenems. Since the first description of the OXA-48 carbapenemase in Turkey, bacterial strains producing the enzyme have been extensively reported in nosocomial and community outbreaks in many parts of the word, particularly in the Mediterranean area and European countries...
October 8, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28981392/extended-spectrum-beta-lactamase-ampc-beta-lactamase-producing-enterobacteriaceae-in-broiler-farms-transmission-dynamics-at-farm-level
#13
Katrin Daehre, Michaela Projahn, Torsten Semmler, Uwe Roesler, Anika Friese
The occurrence of extended-spectrum beta-lactamase- (ESBL) and/or AmpC beta-lactamase- (AmpC) producing Enterobacteriaceae in livestock, especially in broiler fattening flocks, has been demonstrated in previous studies. Nevertheless, data on transmission routes of these resistant bacteria into the fattening farms are rare. Therefore, seven broiler fattening flocks were investigated for the occurrence of ESBL-/AmpC-producing Enterobacteriaceae during the course of the fattening period with the special focus on horizontal transmission routes...
October 5, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28978681/high-stringency-evaluation-of-the-automated-bd-phoenix%C3%A2-cpo-detect-and-rapidec%C3%A2-carba-np-tests-for-detection-and-classification-of-carbapenemases
#14
Gina Thomson, David Turner, William Brasso, Susan Kircher, Thierry Guillet, Kenneth Thomson
There is an urgent need for rapid, accurate detection and classification of carbapenemases. The current study evaluated the automated BD Phoenix™ CPO Detect and the manual bioMérieux RAPIDEC® CARBA NP for meeting these needs. Both tests were challenged with 294 Enterobacteriaceae, Pseudomonas aeruginosa and Acinetobacter baumannii chosen to provide extreme diagnostic difficulty. Carbapenemases such as KPC, NMC-A, IMI, SME, NDM, SPM, IMP, VIM, OXA-23, 40, 48, 58, 72, 181, and 232 were produced by 243 isolates and 51 carbapenemase-negative isolates included porin mutants and producers of ESBLs, AmpCs, K1, and broad spectrum β-lactamases...
October 4, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28973821/risk-ranking-of-antimicrobial-resistant-hazards-found-in-meat-in-switzerland
#15
Lucie Collineau, Luís Pedro Carmo, Andrea Endimiani, Ioannis Magouras, Cedric Müntener, Gertraud Schüpbach-Regula, Katharina D C Stärk
Human exposure to bacteria resistant to antimicrobials and transfer of related genes is a complex issue and occurs, among other pathways, via meat consumption. In a context of limited resources, the prioritization of risk management activities is essential. Since the antimicrobial resistance (AMR) situation differs substantially between countries, prioritization should be country specific. The objective of this study was to develop a systematic and transparent framework to rank combinations of bacteria species resistant to selected antimicrobial classes found in meat, based on the risk they represent for public health in Switzerland...
October 3, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28971872/kinetics-of-sulbactam-hydrolysis-by-%C3%AE-lactamases-and-their-inhibition
#16
Adam B Shapiro
Sulbactam is one of 4 β-lactamase inhibitors in current clinical use to counteract drug resistance caused by degradation of β-lactam antibiotics by these bacterial enzymes. As a β-lactam itself, sulbactam is susceptible to degradation by β-lactamases. We investigated the Michaelis-Menten kinetics of sulbactam hydrolysis by 14 β-lactamases representing clinically widespread groups within all 4 Ambler classes: CTX-M-15, KPC-2, SHV-5, and TEM-1 for class A; IMP-1, NDM-1, and VIM-1 for class B; Acinetobacter baumannii ADC-7, Pseudomonas aeruginosa AmpC and Enterobacter cloacae P99 for class C; and OXA-10, OXA-23, OXA-24, and OXA-48 for class D...
October 2, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28970159/a-review-of-antimicrobial-resistance-surveillance-programmes-in-livestock-and-meat-thereof-in-europe-with-a-focus-on-antimicrobial-resistance-patterns-in-humans
#17
REVIEW
Remco Schrijver, Martijn Stijntjes, Jesús Rodríguez-Baño, Evelina Tacconelli, Nithya Babu Rajendran, Andreas Voss
OBJECTIVES: - Objective of this review was to describe surveillance programmes reporting antimicrobial resistance (AMR) and resistance genes in bacterial isolates from livestock and meat and to compare them with those relevant for human health. METHODS: - A review has been carried out to identify publications on AMR in European countries. PubMed has been reviewed and AMR monitoring programmes were identified from reports retrieved by internet searches and by contacting national authorities in EU/EEA MSs...
September 29, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28968012/-antimicrobial-susceptibility-profile-in-urinary-pathogens-causing-community-acquired-infections-in-diabetic-patients-in-colombia
#18
Laura Cristina Nocua-Báez, Jorge Alberto Cortés, Aura Lucía Leal, Gerson Fitzgerald Arias, María Victoria Ovalle-Guerro, Sandra Yamile Saavedra-Rojas, Giancarlo Buitrago, Javier Antonio Escobar-Pérez, Betsy Castro-Cardozo
INTRODUCTION: Urinary tract infection is the most common pathology in diabetic patients, and an important determinant of morbidity and mortality among them. The increasing resistance of uropathogens acquired in the community to commonly used antibiotics is alarming. OBJECTIVE: To identify the profile of antibiotic susceptibility of uropathogens responsible for communityacquired infections among diabetic patients in hospitals in Colombia. MATERIALS AND METHODS: We conducted a descriptive study in a subgroup of diabetic patients in the framework of a larger study in adults with urinary tract infection acquired in the community...
September 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28962008/ampc-%C3%AE-lactamase-induction-by-avibactam-and-relebactam
#19
David M Livermore, Dorota Jamrozy, Shazad Mushtaq, Wright W Nichols, Katherine Young, Neil Woodford
Background: Diazabicyclooctanes, e.g. avibactam and relebactam, are a new class of β-lactamase inhibitors. Their spectrum includes AmpC enzymes, but it is important to understand whether they also induce these enzymes. Methods: Levels of ampC mRNA were measured by RT-PCR during 4 h of exposure of Enterobacter cloacae , Citrobacter freundii and Pseudomonas aeruginosa ( n  =   5 strains per species) to avibactam, relebactam and cefoxitin at 0, 1, 4 and 32 mg/L...
September 6, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28962001/rapid-detection-of-esbl-carbapenemases-mrsa-and-other-important-resistance-phenotypes-within-6-8%C3%A2-h-by-automated-disc-diffusion-antibiotic-susceptibility-testing
#20
Michael Hombach, Marion Jetter, Peter M Keller, Nicolas Blöchliger, Natalia Kolesnik-Goldmann, Erik C Böttger
Background: In principle, automated systems allow rapid reading of disc diffusion AST (rAST) within 6-8 h. Objectives: This study analysed whether rAST can discriminate resistance phenotypes such as ESBL, carbapenemases and MRSA/methicillin-resistant Staphylococcus epidermidis from WT populations. We describe species-drug combinations that may require clinical breakpoint adaptions for early reading due to zone diameter changes during the incubation period. Methods: In total, 1852 clinical strains [ Escherichia coli ( n  =   475), Klebsiella pneumoniae ( n  =   375), Enterobacter cloacae ( n  =   301), Staphylococcus aureus ( n  =   407) and S...
August 9, 2017: Journal of Antimicrobial Chemotherapy
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