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Enterobacteriaceae

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https://www.readbyqxmd.com/read/28549141/risk-factors-for-acquisition-of-ctx-m-genes-in-pilgrims-during-hajj-2013-and-2014
#1
Thongpan Leangapichart, Hervé Tissot-Dupont, Didier Raoult, Ziad A Memish, Jean-Marc Rolain, Philippe Gautret
Background: Mass gatherings, especially the Hajj pilgrimage, provide favourable conditions for bacterial transmission among participants, which might contribute to the international spread of ESBL-producing Enterobacteriaceae (ESBL-E). Objectives: We conducted an analysis aimed at investigating risk factors for CTX-M gene ( bla CTX-M ) rectal carriage in 2013 and 2014 Hajj pilgrims. Methods: A total of 218 pilgrims provided paired pre- and post-Hajj rectal samples (2013, 129 pilgrims; 2014, 89 pilgrims)...
May 26, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28546984/the-comparison-of-printed-resources-bacterial-contamination-in-libraries-of-al-zahra-hospital-and-sciences-faculty-of-isfahan-university-and-the-determination-of-their-antibiotic-sensitivity-pattern
#2
Hosein Rafiei, Mostafa Chadeganipour, Rezvan Ojaghi, Mohammad Reza Maracy, Rasool Nouri
INTRODUCTION: During the library loan process, the printed resources can be a carrier of pathogenic bacteria. In this study, it was tried to compare the Bacterial Contamination Rates and their antibiotic sensitivity pattern in printed resources of a hospital and a non-hospital library. METHODS: This is a cross-sectional study. Returning books from the Al-Zahra hospital library and library of Sciences faculty of Isfahan University provides the research community...
2017: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/28545899/multiple-brain-abscesses-due-to-enterobacter-cloacae-in-an-immune-competent-child
#3
Arushi Gahlot Saini, Vinay Rathore, Chirag Kumar Ahuja, Rajesh Chhabra, Pankaj C Vaidya, Pratibha Singhi
Brain abscesses due to Enterobacteriaceae in immune-competent children are rare, and those due to Enterobacter cloacae are even rarer. We report an interesting case of community-acquired E. cloacae neuroinfection resulting in multiple brain abscesses in a young child with no underlying risk-factors. A 10 year-old-boy presented with low-grade fever, headache, neck pain and progressive deterioration of sensorium. On examination, he was conscious but drowsy with photophobia, normal fundii, meningeal signs, mild hypertonia, brisk muscle stretch reflexes and extensor plantar responses...
May 22, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28545061/microbiota-induced-peritrophic-matrix-regulates-midgut-homeostasis-and-prevents-systemic-infection-of-malaria-vector-mosquitoes
#4
Faye H Rodgers, Mathilde Gendrin, Claudia A S Wyer, George K Christophides
Manipulation of the mosquito gut microbiota can lay the foundations for novel methods for disease transmission control. Mosquito blood feeding triggers a significant, transient increase of the gut microbiota, but little is known about the mechanisms by which the mosquito controls this bacterial growth whilst limiting inflammation of the gut epithelium. Here, we investigate the gut epithelial response to the changing microbiota load upon blood feeding in the malaria vector Anopheles coluzzii. We show that the synthesis and integrity of the peritrophic matrix, which physically separates the gut epithelium from its luminal contents, is microbiota dependent...
May 17, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28542593/lack-of-the-pga-exopolysaccharide-in-salmonella-as-an-adaptive-trait-for-survival-in-the-host
#5
Maite Echeverz, Begoña García, Amaia Sabalza, Jaione Valle, Toni Gabaldón, Cristina Solano, Iñigo Lasa
Many bacteria build biofilm matrices using a conserved exopolysaccharide named PGA or PNAG (poly-β-1,6-N-acetyl-D-glucosamine). Interestingly, while E. coli and other members of the family Enterobacteriaceae encode the pgaABCD operon responsible for PGA synthesis, Salmonella lacks it. The evolutionary force driving this difference remains to be determined. Here, we report that Salmonella lost the pgaABCD operon after the divergence of Salmonella and Citrobacter clades, and previous to the diversification of the currently sequenced Salmonella strains...
May 24, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28542503/biofilm-microenvironment-induces-a-widespread-adaptive-amino-acid-fermentation-pathway-conferring-strong-fitness-advantage-in-escherichia-coli
#6
Sylvie Létoffé, Sabina Chalabaev, José Dugay, Franziska Stressmann, Bianca Audrain, Jean-Charles Portais, Fabien Letisse, Jean-Marc Ghigo
Bacterial metabolism has been studied primarily in liquid cultures, and exploration of other natural growth conditions may reveal new aspects of bacterial biology. Here, we investigate metabolic changes occurring when Escherichia coli grows as surface-attached biofilms, a common but still poorly characterized bacterial lifestyle. We show that E. coli adapts to hypoxic conditions prevailing within biofilms by reducing the amino acid threonine into 1-propanol, an important industrial commodity not known to be naturally produced by Enterobacteriaceae...
May 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28542393/head-to-head-comparison-of-microflex-lt-and-vitek-ms-systems-for-routine-identification-of-microorganisms-by-maldi-tof-mass-spectrometry-in-chile
#7
Lorena Porte, Patricia García, Stephanie Braun, María Teresa Ulloa, Mónica Lafourcade, Alisson Montaña, Carolina Miranda, Gerardo Acosta-Jamett, Thomas Weitzel
BACKGROUND: Matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry (MS) is a new and revolutionary identification method for microorganisms and has recently been introduced into clinical microbiology in many industrialized countries in Europe and North America. OBJECTIVES: Our study aimed to compare the performance and practicality of two commercial MALDI-TOF MS platforms in a head-to head manner at a routine laboratory in Chile...
2017: PloS One
https://www.readbyqxmd.com/read/28541467/global-epidemiology-of-ctx-m-%C3%AE-lactamases-temporal-and-geographical-shifts-in-genotype
#8
Edward R Bevan, Annie M Jones, Peter M Hawkey
Globally, rates of ESBL-producing Enterobacteriaceae are rising. We undertook a literature review, and present the temporal trends in blaCTX-M epidemiology, showing that blaCTX-M-15 and blaCTX-M-14 have displaced other genotypes in many parts of the world. Explanations for these changes can be attributed to: (i) horizontal gene transfer (HGT) of plasmids; (ii) successful Escherichia coli clones; (iii) ESBLs in food animals; (iv) the natural environment; and (v) human migration and access to basic sanitation...
May 25, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28539090/development-and-application-of-the-compression-frictional-treatment-method-cft-for-sterilizing-and-valorising-organic-waste
#9
Allison Talley, Robert Heimann, Stergios Vakalis
Confined animal feeding operations are producing large amounts of organic waste with large fractions being mixtures of manure and sawdust. On one hand, the inhomogeneity of the material and the high water content restrict the optimal application of thermal treatment methods. On the other hand, the high concentration of bacteria in these mixed waste streams is issue of concern. This study introduces a novel process for treating manure & woody biomass mixtures and upgrading them into valuable products. It is defined as Compression Frictional Treatment and takes place continuously in a Rotary Compression Unit...
May 25, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28538846/-clinical-and-microbiological-study-of-catheter-associated-urinary-tract-infections-in-internal-medicine-services-of-a-venezuelan-university-hospital
#10
Pedro Quijada-Martínez, Ana Flores-Carrero, Indira Labrador, María Araque
Objectives: To determine the clinical and microbiological characteristics of catheter-associated urinary tract infections (CA-UTI) in patients admitted to the Internal Medicine services of the Hospital Universitario de Los Andes (HULA), Mérida, Venezuela and to establish the clonal distribution of multi-resistant Enterobacteriaceae that produce this infection. Materials and Methods: Seventy-three adult patients with bladder catheterization were studied between January and July 2015...
January 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/28537547/increasing-proportion-of-carbapenemase-producing-enterobacteriaceae-and-emergence-of-a-mcr-1-producer-through-a-multicentric-study-among-hospital-based-and-private-laboratories-in-belgium-from-september-to-november-2015
#11
Te Din Huang, Pierre Bogaerts, Catherine Berhin, Martin Hoebeke, Caroline Bauraing, Youri Glupczynski
Carbapenemase-producing Enterobacteriaceae (CPE) strains have been increasingly reported in Belgium. We aimed to determine the proportion of CPE among Enterobacteriaceae isolated from hospitalised patients and community outpatients in Belgium in 2015. For the hospitalised patients, the results were compared to a previous similar survey performed in the same hospitals in 2012. Twenty-four hospital-based and 10 private laboratories collected prospectively 200 non-duplicated Enterobacteriaceae isolates from clinical specimens...
May 11, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28536292/capsule-production-and-glucose-metabolism-dictate-fitness-during-serratia-marcescens-bacteremia
#12
Mark T Anderson, Lindsay A Mitchell, Lili Zhao, Harry L T Mobley
Serratia marcescens is an opportunistic pathogen that causes a range of human infections, including bacteremia, keratitis, wound infections, and urinary tract infections. Compared to other members of the Enterobacteriaceae family, the genetic factors that facilitate Serratia proliferation within the mammalian host are less well defined. An in vivo screen of transposon insertion mutants identified 212 S. marcescens fitness genes that contribute to bacterial survival in a murine model of bloodstream infection...
May 23, 2017: MBio
https://www.readbyqxmd.com/read/28535946/activity-of-minocycline-against-klebsiella-pneumoniae-carbapenemase-kpc-producing-enterobacteriaceae-clinical-isolates-with-comparison-to-doxycycline-and-tigecycline
#13
Alice Chen, Kenneth P Smith, Betsy A Whitfield, Paola C Zucchi, Todd M Lasco, Tiffany E Bias, James E Kirby, Elizabeth B Hirsch
We examined the in vitro activity of minocycline against 103 Klebsiella pneumoniae carbapenemase (KPC)-producing Enterobacteriaceae isolates and found approximately half had susceptible (26%) or intermediate (26%) MICs. For a subset of 35 isolates, susceptibility was highest to tigecycline (71% FDA vs. 20% EUCAST) followed by minocycline (14%) and then doxycycline (6%).
May 11, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28535310/imported-food-and-feed-as-contributors-to-the-introduction-of-plasmid-mediated-colistin-resistant-enterobacteriaceae-to-a-low-prevalence-country
#14
Jannice Schau Slettemeås, Anne-Margrete Urdahl, Solveig Sølverød Mo, Gro S Johannessen, Kari Grave, Madelaine Norström, Martin Steinbakk, Marianne Sunde
No abstract text is available yet for this article.
May 23, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28535303/a-novel-goldnano-carb-test-for-rapid-phenotypic-detection-of-carbapenemases-particularly-oxa-type-in-enterobacteriaceae-pseudomonas-aeruginosa-and-acinetobacter-spp
#15
Arpasiri Srisrattakarn, Aroonlug Lulitanond, Chotechana Wilailuckana, Nicha Charoensri, Jureerut Daduang, Aroonwadee Chanawong
Objectives: To develop a simple gold nanoparticle (AuNP)-based colorimetric test, GoldNano Carb (GoldC), for detecting carbapenemase production in Gram-negative bacteria, compared with updated Carba NP (CNP) and CarbAcineto NP (CAcNP) tests by using PCR methods as gold standard. Methods: Ninety-nine carbapenemase-producing Enterobacteriaceae (CPE), Pseudomonas spp. and Acinetobacter spp. isolates and 89 non-CPE isolates were tested by the GoldC and CNP. Additionally, the CAcNP was performed in the Acinetobacter spp...
May 23, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28533001/evaluation-of-the-rapidec%C3%A2-carba-np-and-%C3%AE-carba%C3%A2-tests-for-rapid-detection-of-carbapenemase-producing-enterobacteriaceae
#16
Stefano Mancini, Nicolas Kieffer, Laurent Poirel, Patrice Nordmann
The analytical performances of the RAPIDEC CARBA NP® (bioMérieux) and the β-CARBA® (Bio-Rad) tests were evaluated for the rapid detection of any known type of carbapenemases in Enterobacteriaceae. An international collection of 149 enterobacterial isolates comprising 111 Carbapenemase-Producing Enterobacteriaceae (CPE) and 38 non-carbapenemase producers was used. CPE included 32 carbapenemase producers of class A (18 KPC-2, 1 FRI-1, 5 SME and 8 IMI), 33 of class B (13 NDM, 11 VIM and 9 IMP) and 46 of class D (15 OXA-48, 14 OXA-181, 10 OXA-204, 3 OXA-232 and 4 OXA-162)...
May 13, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28528989/infections-during-extracorporeal-membrane-oxygenation-epidemiology-risk-factors-pathogenesis-and-prevention
#17
REVIEW
Stefano Biffi, Stefano Di Bella, Vittorio Scaravilli, Anna Maria Peri, Giacomo Grasselli, Laura Alagna, Antonio Pesenti, Andrea Gori
Extracorporeal membrane oxygenation (ECMO) is a life support technique used in patients with respiratory and/or cardiac failure. The ECMO circuit consists of vascular cannulae, a pump and an artificial lung. Infections are among the most common complications associated with ECMO and have a significant impact on the mortality rate. Here we present a narrative literature review regarding the epidemiology, risk factors, pathogenesis and prevention of infectious complications during ECMO support. The prevalence of hospital-acquired infections during ECMO is 10-12% and their occurrence is likely to be more frequent compared with other critically ill patients...
May 18, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28528405/pitfalls-of-defining-combination-therapy-for-carbapenem-resistant-enterobacteriaceae-in-observational-studies
#18
EDITORIAL
D R Giacobbe, A E Maraolo, C Viscoli
No abstract text is available yet for this article.
May 21, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28526792/environmental-spread-of-ndm-1-producing-multi-drug-resistant-bacteria-in-dhaka-bangladesh
#19
Mohammad Aminul Islam, Moydul Islam, Rashedul Hasan, M Iqbal Hossain, Ashikun Nabi, Mahdia Rahman, Wil H F Goessens, Hubert P Endtz, Alexandria B Boehm, Shah M Faruque
Resistance to carbapenem antibiotics through the production of New Delhi Metallo-β-lactamase-1 (NDM-1) constitutes an emerging challenge in the treatment of bacterial infections. To monitor possible source of spread of these organisms in Dhaka, Bangladesh, we conducted comparative analysis of waste water samples from hospital adjacent areas (HAR) and from community areas (COM) as well as public tap water samples for the occurrence and characteristics of NDM-1 producing bacteria. Of 72 HAR samples tested 51 (71%) were positive for NDM-1-producing bacteria as evidenced by phenotypic tests and the presence of blaNDM-1 gene, compared to 5 of 41 (12...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526080/post-weaning-diarrhea-in-pigs-risk-factors-and-non-colistin-based-control-strategies
#20
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
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