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https://www.readbyqxmd.com/read/28340557/development-of-selective-medium-for-imp-type-carbapenemase-producing-enterobacteriaceae-in-stool-specimens
#1
Norihisa Yamamoto, Ryuji Kawahara, Yukihiro Akeda, Rathina Kumar Shanmugakani, Hisao Yoshida, Hideharu Hagiya, Naohiro Hara, Isao Nishi, Satomi Yukawa, Rumiko Asada, Yumi Sasaki, Kazuhiro Maeda, Noriko Sakamoto, Shigeyuki Hamada, Kazunori Tomono
BACKGROUND: Identification of carbapenemase-producing Enterobacteriaceae (CPE) in faecal specimens is challenging. This fact is particularly critical because low-level carbapenem-resistant organisms such as IMP-producing CPE are most prevalent in Japan. We developed a modified selective medium more suitable for IMP-type CPE. METHODS: Fifteen reference CPE strains producing different types of β-lactamases were used to evaluate the commercially available CHROMagar KPC and chromID CARBA as well as the newly prepared MC-ECC medium (CHROMagar ECC supplemented with meropenem, cloxacillin, and ZnSO4) and M-ECC medium (CHROMagar ECC supplemented with meropenem and ZnSO4)...
March 24, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28337042/household-transmission-of-ndm-producing-e-coli-in-new-zealand
#2
Matthew Blakiston, Sally A Roberts, Joshua T Freeman, Helen Heffernan
This report describes the introduction of an extensively antibiotic-resistant carbapenemase-producing Escherichia coli into a hospital in Auckland, New Zealand, by a patient who was a household contact of recent travellers to the Indian subcontinent. The carbapenemase was identified as New Delhi metallo-β-lactamase (NDM) and reflects probable household transmission in the context of a recent upsurge in NDM-producing Enterobacteriaceae isolation in New Zealand. The observations in this report suggest that hospital screening practices to identify carbapenemase-producing Enterobacteriaceae (CPE) colonised patients may need to be extended to include travellers to high-risk countries who were not hospitalised during their trip, and possibly also their close contacts...
March 24, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28334746/a-newborn-with-transient-diabetes-mellitus-accompanied-by-ketoacidosis-attributable-to-a-zfp57-mutation
#3
Fatma Iyigun, Beyza Ozcan, Ferit Kulali, Istemi Han Celik, Semra Cetinkaya, Ahmet Yagmur Bas, Nihal Demirel
Hyperglycemia commencing within the first 6 months of life requires exogenous insulin therapy and, if the condition persists for >2 weeks, is termed neonatal diabetes mellitus (NDM). This rare illness is of two types: transient and permanent NDM. Most cases come to medical attention because of nonspecific symptoms, including intrauterine growth retardation, dehydration, difficulties in feeding and inadequate weight gain. In the present article, we describe an infant who smelt of ketones during examination and who was diagnosed with transient NDM caused by a ZFP57 mutation, accompanied by ketoacidosis...
February 18, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28333363/evaluation-of-the-%C3%AE-carba%C3%A2-test-a-colorimetric-test-for-the-rapid-detection-of-carbapenemase-activity-in-gram-negative-bacilli
#4
Sandrine Bernabeu, Laurent Dortet, Thierry Naas
Objectives: There is an urgent need for accurate and fast diagnostic tests to identify carbapenemase-producing bacteria. Here, we have evaluated a novel colorimetric test (the β-CARBA™ test; Bio-Rad) to detect carbapenemase-producing Gram-negative bacilli from cultured colonies. Methods: The performance of the β-CARBA™ test was compared with that of the Carba NP test (or the CarbAcineto NP test) and RAPIDEC ® CARBA NP (bioMérieux) using a collection of 290 isolates with characterized β-lactamase content...
March 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333332/wck-5222-cefepime-zidebactam-antimicrobial-activity-tested-against-gram-negative-organisms-producing-clinically-relevant-%C3%AE-lactamases
#5
Helio S Sader, Paul R Rhomberg, Robert K Flamm, Ronald N Jones, Mariana Castanheira
Background: Zidebactam is a β-lactam enhancer antibiotic with a dual mechanism of action involving binding to Gram-negative PBP2 and β-lactamase inhibition. Cefepime combined with zidebactam (WCK 5222) is under clinical development for treatment of Gram-negative infections. Objectives: To evaluate the in vitro activities of cefepime and zidebactam separately and combined at 1:1 and 2:1 ratios when tested against Gram-negative organisms producing the most clinically relevant β-lactamase types...
March 18, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333234/horizontal-transfer-of-the-blandm-1-gene-to-pseudomonas-aeruginosa-and-acinetobacter-baumannii-in-biofilms
#6
Windy D Tanner, Robyn M Atkinson, Ramesh K Goel, Mark A Toleman, Lowell Scott Benson, Christina A Porucznik, James A VanDerslice
Horizontal gene transfer has contributed to the global spread of the blaNDM-1 gene. Multiple studies have demonstrated plasmid transfer of blaNDM-1 between Gram-negative bacteria, primarily Enterobacteriaceae species, but conjugational transfer of natural blaNDM-1 plasmids from Enterobacteriaceae into Pseudomonas aeruginosa and Acinetobacter baumannii has not previously been shown. As P. aeruginosa and A. baumannii are both typically strong biofilm-formers, transfer of natural blaNDM-1 plasmids could potentially occur more readily in this environment...
February 25, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28333193/increased-activity-of-colistin-in-combination-with-amikacin-against-escherichia-coli-co-producing-ndm-5-and-mcr-1
#7
Yu-Feng Zhou, Meng-Ting Tao, Youjun Feng, Run-Shi Yang, Xiao-Ping Liao, Ya-Hong Liu, Jian Sun
Objectives: Colistin and carbapenem are two lines of last-resort antibiotics against lethal infections caused by MDR Gram-negative pathogens. The emergence of carbapenemase-positive Escherichia coli with colistin resistance poses a serious threat to public health worldwide. Here we report, for the first time (to the best of our knowledge), a novel combination therapy used for the treatment of E. coli co-producing MCR-1 and NDM-5. Methods: The MICs of colistin were determined alone and with 1-4 mg/L amikacin...
February 20, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28323911/monogenic-diabetes-accounts-for-6-3-of-cases-referred-to-15-italian-pediatric-diabetes-centers-during-2007-2012
#8
Maurizio Delvecchio, Enza Mozzillo, Giuseppina Salzano, Dario Iafusco, Giulio Frontino, Patrizia I Patera, Ivana Rabbone, Valentino Cherubini, Valeria Grasso, Nadia Tinto, Sabrina Giglio, Giovanna Contreas, Rosa Di Paola, Alessandro Salina, Vittoria Cauvin, Stefano Tumini, Giuseppe d'Annunzio, Lorenzo Iughetti, Vilma Mantovani, Giulio Maltoni, Sonia Toni, Marco Marigliano, Fabrizio Barbetti
Context: Etiologic diagnosis of diabetes may impact on therapeutic strategy, and prognosis of chronic complications. Objective: The aim of the study was to establish the relative percentage of different diabetes subtypes in patients attending Italian pediatric diabetes centers, and the influence of etiologic diagnosis on therapy. Design, Setting and Patients: This was a retrospective study. Clinical records of 3781 consecutive patients (age: 0-18 years) referred to fifteen pediatric diabetes clinics and diagnosed with diabetes or IFG between Jan/1/2007 and Dec/31/2012 were examined...
February 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28320396/occurrence-of-bla-dha-1-mediated-cephalosporin-resistance-in-escherichia-coli-and-their-transcriptional-response-against-cephalosporin-stress-a-report-from-india
#9
Birson Ingti, Deepjyoti Paul, Anand Prakash Maurya, Debajyoti Bora, Debadatta Dhar Chanda, Atanu Chakravarty, Amitabha Bhattacharjee
BACKGROUND: Treatment alternatives for DHA-1 harboring strains are challenging as it confers resistance to broad spectrum cephalosporins and may further limit treatment option when expressed at higher levels. Therefore, this study was designed to know the prevalence of DHA genes and analyse the transcription level of DHA-1 against different β-lactam stress. METHODS: Screening of AmpC β-lactamase phenotypically by modified three dimensional extract method followed by Antimicrobial Susceptibility and MIC determination...
March 21, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28320154/advances-in-assessing-myotonia-can-sensor-engineered-glove-have-a-role
#10
Simona Portaro, Margherita Russo, Antonino Naro, Alessia Bramanti, Placido Bramanti, Carmelo Rodolico, Rocco Salvatore Calabrò
Non-dystrophic (NDMs) and Dystrophic Myotonias (DMs) are diseases characterized by the presence of myotonia with or without muscle weakness. A standardized myotonia assessment is important to more objectively quantify the handgrip myotonia. We screened 10 patients affected by NDM and 10 patients with DM, using the sensor-engineered glove (SEG). The time required to perform a complete finger extension (grip myotonia time, GMT) at maximum velocity (MV) after maximum voluntary contraction (MVC) was evaluated through an ad hoc protocol including rest, exercise, and ice effects on handgrip myotonia...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319394/a-network-of-conformational-transitions-in-the-apo-form-of-ndm-1-enzyme-revealed-by-md-simulation-and-a-markov-state-model
#11
Kaifu Gao, Yunjie Zhao
New Delhi metallo-β-lactamase-1 (NDM-1) is a novel β-Lactamase enzyme that confers enteric bacteria with nearly complete resistance to all β-lactam antibiotics, so raises a formidable and global threat to human health. However, the binding mechanism between apo-NDM-1 and antibiotics as well as related conformational changes remains poorly understood, which largely hinders the overcoming of its antibiotic resistance. In our study, long-time conventional molecular dynamics simulation and Markov state models were applied to reveal both dynamical and conformational landscape of apo-NDM-1: the MD simulation demonstrates that the loop L3, which is responsible for antibiotic binding, is the most flexible and undergoes dramatic conformational changes; moreover, the Markov state model built from the simulation maps four metastable states including open, semi-open and closed conformations of the loop L3 as well as frequent transitions between the states...
March 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28303191/vim-1-carbapenemase-producing-escherichia-coli-in-gulls-from-southern-france
#12
Marion Vittecoq, Chrislène Laurens, Lionel Brazier, Patrick Durand, Eric Elguero, Audrey Arnal, Frédéric Thomas, Salim Aberkane, Nicolas Renaud, Franck Prugnolle, Jérôme Solassol, Hélène Jean-Pierre, Sylvain Godreuil, François Renaud
Acquired carbapenemases currently pose one of the most worrying public health threats related to antimicrobial resistance. A NDM-1-producing Salmonella Corvallis was reported in 2013 in a wild raptor. Further research was needed to understand the role of wild birds in the transmission of bacteria resistant to carbapenems. Our aim was to investigate the presence of carbapenem-resistant Escherichia coli in gulls from southern France. In 2012, we collected 158 cloacal swabs samples from two gull species: yellow-legged gulls (Larus michahellis) that live in close contact with humans and slender-billed gulls (Chroicocephalus genei) that feed at sea...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28298454/in-vitro-activity-of-imipenem-against-carbapenemase-positive-enterobacteriaceae-smart-global-surveillance-program-2008-2014
#13
James A Karlowsky, Sibylle H Lob, Krystyna M Kazmierczak, Robert E Badal, Katherine Young, Mary R Motyl, Daniel F Sahm
The Study for Monitoring Antimicrobial Resistance Trends (SMART) global surveillance program collected 103,960 isolates of Enterobacteriaceae from 2008 to 2014. From this isolate collection all ertapenem-non-susceptible isolates (MIC, ≥1 μg/ml; n = 3,428) and 9,371 isolates of Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, and Proteus mirabilis with an ertapenem-susceptible extended-spectrum β-lactamase (ESBL)-positive phenotype were assessed for the presence of common carbapenemase genes using the Check-MDR CT101 microarray (Check-Points, Wageningen, the Netherlands) and published multiplex PCR assays...
March 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28293307/sensitivity-to-antimicrobial-drugs-of-pseudomonas-aeruginosa-extreme-resistant-strains-isolated-in-the-major-hospitals-of-central-kazakhstan
#14
Ilya S Azizov, Alyona V Lavrinenko, Ilya A Belyaev, Dmitry B Babenko, Natalya A Shambilova, Nelya M Bissenova
AIM: The article presents the current data on the sensitivity of the main 37 strains of eXtremaly Drugs Resistance (XDR) category to anti-pseudomonas drugs. MATERIAL AND METHODS: The strains were collected during the prospective multicenter study in large multidisciplinary hospitals of Central Kazakhstan. Susceptibility to antimicrobial drugs was carried out by disk method and the serial dilution method with the interpretation of the results according to EUCAST criteria...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28284092/antibiotic-resistant-pseudomonas-spp-in-the-aquatic-environment-a-prevalence-study-under-tropical-and-temperate-climate-conditions
#15
Naresh Devarajan, Thilo Köhler, Periyasamy Sivalingam, Christian van Delden, Crispin K Mulaji, Pius T Mpiana, Bastiaan W Ibelings, John Poté
Microbial populations which are resistant to antibiotics are an emerging environmental concern with potentially serious implications for public health. Thus, there is a growing concern in exploring the occurrence of antibiotic resistance in the environment with no limitations to the factors that contribute to their emergence. The aquatic environment is considered to be a hot-spot for the acquisition and spread of antibiotic resistance due to pollution with emerging contaminants derived from anthropogenic activities...
February 27, 2017: Water Research
https://www.readbyqxmd.com/read/28271693/comparison-of-the-novel-oxa-48-and-kpc-k-set-assay-and-blue-carba-test-for-the-detection-of-carbapenemase-producing-enterobacteriaceae-using-pcr-as-a-reference-method
#16
Fatma Erdem, Ayham Abulaila, Zerrin Aktas, Oral Oncul
BACKGROUND: Rapid, simple, and accurate laboratory detection of carbapenemases is very important for proper antibiotic therapy and infection control. METHODS: In this study, carbapenem-nonsusceptible Enterobacteriaceae (CRE) isolates were used to evaluate the performance of a new lateral flow immunochromatographic (IC) assay, the OXA-48 and KPC K-SeT assay, and modified Blue-Carba test (BCT) for the rapid detection of OXA-48 carbapenemase in comparison with polymerase chain reaction (PCR) amplification...
March 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28264751/characterization-of-transformants-obtained-from-ndm-1-producing-enterobacteriaceae-in-brazil
#17
Franciéli P Rozales, Cibele M Magagnin, Juliana C Campos, Mariana Pagano, Luciana S Nunes, Lisiane R Pancotto, Jorge L M Sampaio, Alexandre P Zavascki, Afonso L Barth
No abstract text is available yet for this article.
March 7, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28263596/inactivation-of-a-virulent-wastewater-escherichia-coli-and-non-virulent-commensal-escherichia-coli-dsm1103-strains-and-their-gene-expression-upon-solar-irradiation
#18
Nada Al-Jassim, David Mantilla-Calderon, Tiannyu Wang, Peiying Hong
This study examined the decay kinetics and molecular responses of two E. coli strains upon solar irradiation. The first is E. coli PI-7, a virulent and antibiotic-resistant strain that was isolated from wastewater and carries the emerging NDM-1 antibiotic resistance gene. The other strain, E. coli DSM1103, displayed lower virulence and antibiotic resistance than E. coli PI-7. In a buffer solution, E. coli PI-7 displayed a longer lag phase prior to decay and a longer half-life compared with E. coli DSM1103 (6...
March 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28254249/comparative-evaluation-of-a-new-commercial-media-the-chromagar%C3%A2-msupercarba%C3%A2-for-the-detection-of-carbapenemase-producing-enterobacteriaceae
#19
Ma'ayan Amar, Ohad Shalom, Amos Adler
A new chromogenic-based medium (mSuperCARBA™) was tested for screening carbapenemase-producing Enterobacteriaceae (CPE). mSuperCARBA™ was more sensitive (83%) in detecting CPE isolates (n=69, including KPC, NDM, OXA-48, VIM, and IMI) compared with CHROMAgar™-KPC (65%) and MacConkey agar with Imipenem (69%) with comparable specificity for non carbapenemase-producing, carbapenem-resistant Enterobacteriaceae (n=29).
February 11, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28249575/first-report-on-bla-ndm-1-producing-acinetobacter-baumannii-in-three-clinical-isolates-from-ethiopia
#20
Michael Pritsch, Ahmed Zeynudin, Maxim Messerer, Simon Baumer, Gabriele Liegl, Soeren Schubert, Thomas Löscher, Michael Hoelscher, Tefara Belachew, Andrea Rachow, Andreas Wieser
BACKGROUND: Multidrug-resistant Gram-negative bacterial infections are recognized as one of the major threats to global health. In this study, we describe for the first time bla NDM-1 gene carrying organisms from Ethiopia consisting of three Acinetobacter baumannii isolates from patients in Jimma. METHODS: Besides phenotypic antimicrobial susceptibility testing, molecular strain typing and sequencing was performed to describe the phylogenetic relation of the Ethiopian isolates in detail in relation to published isolates from all over the globe...
March 1, 2017: BMC Infectious Diseases
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