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OXA-48

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https://www.readbyqxmd.com/read/28712369/a-hospital-based-matched-case-control-study-to-identify-risk-factors-for-clinical-infection-with-oxa-48-producing-klebsiella-pneumoniae-in-rectal-carriers
#1
A Madueño, J Gonzalez Garcia, A Aguirre-Jaime, M Lecuona
Asymptomatic colonisation of the gastrointestinal tract by carbapenemase-producing Enterobacteriaceae is an important reservoir for transmission, which may precede infection. This retrospective observational case-control study was designed to identify risk factors for developing clinical infection with OXA-48-producing Klebsiella pneumoniae in rectal carriers during hospitalisation. Case patients (n = 76) had carbapenemase-producing K. pneumoniae (CPKP) infection and positive rectal culture for CPKP. Control patients (n = 174) were those with rectal colonisation with CPKP but without CPKP infection...
July 17, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28708476/a-long-term-study-of-the-diversity-of-oxa-48-like-carbapenemase-producing-bacterial-strains-in-infected-patients-and-carriers
#2
Paul-Louis Woerther, Taha Jardak, Inès Ben Hassine, Sébastien Forget, Elisabeth Chachaty, Guillaume Arlet, Dominique Decré
PURPOSE: Since their emergence at the beginning of the century, OXA-48 carbapenemases have spread in the community and in hospitals. To assess the diversity of OXA-48-producing bacterial strains and plasmids in the hospital setting, we studied the strains isolated from patients in three hospitals in the Paris area. MATERIALS AND METHODS: All possible OXA-48-like strains were included in the study. OXA-48-like and extended-spectrum beta-lactamase-encoding genes were identified, and fingerprinting analysis was performed for all Escherichia coli and Klebsiella pneumoniae strains...
July 14, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28676118/dissemination-of-carbapenem-resistant-klebsiella-pneumoniae-clinical-isolates-with-various-combinations-of-carbapenemases-kpc-2-ndm-1-ndm-4-and-oxa-48-and-16s-rrna-methylases-rmtb-and-rmtc-in-vietnam
#3
Tatsuya Tada, Mitsuhiro Tsuchiya, Kayo Shimada, Tran Thi Thanh Nga, Le Thi Anh Thu, Truong Thien Phu, Norio Ohmagari, Teruo Kirikae
METHODS: Twenty-seven clinical isolates of carbapenem-resistant Klebsiella pneumoniae with MICs ≥4 mg/L for imipenem or meropenem were obtained from inpatients in a hospital in Vietnam. Antimicrobial susceptibility tests and whole genome sequencing were performed. Multilocus sequence typing and the presence of drug resistant genes were determined and a maximum-likelihood phylogenetic tree was constructed by SNP alignment of whole genome sequencing data. RESULTS: All the isolates harbored one of genes encoding carbapenemases, including KPC-2, NDM-1, NDM-4 and OXA-48...
July 4, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28674064/oxa-244-producing-escherichia-coli-isolates-a-challenge-for-clinical-microbiology-laboratories
#4
Yannick Hoyos-Mallecot, Thierry Naas, Rémy A Bonnin, Rafael Patino, Philippe Glaser, Nicolas Fortineau, Laurent Dortet
OXA-244 is a single point mutant derivative of OXA-48 displaying reduced carbapenemase activity. Here, we report microbiological features of 7 OXA-244-producing E. coli isolates. Only one isolate grew on the ChromID® CARBA SMART medium (bioMérieux), but 6/7 grew on ChromID® ESBL medium (bioMérieux), as they co-produced either an extended spectrum β-lactamase and or a plasmid-encoded cephalosporinase. The production of a carbapenemase was detected in 57.1%, 71.4%, 71.4%, and 100% of the E. coli isolates using the Carba NP test, the RAPIDEC® CARBA NP (bioMérieux), a MALDI-TOF MS hydrolysis assay (Bruker), and OXA-48 K-SeT® (Coris bioconcept), respectively...
July 3, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28668692/wastewater-is-a-reservoir-for-clinically-relevant-carbapenemase-and-16s-rrna-methylase-producing-enterobacteriaceae
#5
Katrin Zurfluh, Claudia Bagutti, Peter Brodmann, Monica Alt, Jürg Schulze, Séamus Fanning, Roger Stephan, Magdalena Nüesch-Inderbinen
The aim of the study was to evaluate wastewater for carbapenemase producing Enterobacteriaceae (CPE) and 16S rRNA methylase producing Gram negative bacteria (MPB), and to assess their occurrence following wastewater treatment. Wastewater samples were collected between June 2015 and March 2016 in the sewage network of the city of Basel from sites located before and after influx of wastewater from the hospital into the sewage network. Samples were also obtained from the influent and from the effluent of the receiving wastewater treatment plant...
June 28, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28666748/shewanella-species-as-the-origin-of-blaoxa-48-genes-insights-into-gene-diversity-associated-phenotypes-and-possible-transfer-mechanisms
#6
Marta Tacão, Susana Araújo, Maria Vendas, Artur Alves, Isabel Henriques
Chromosome-encoded beta-lactamases of Shewanella spp. have been indicated as probable progenitors of blaOXA-48-like genes. However, these have been detected in few Shewanella spp. and dissemination mechanisms are not yet clarified. Thus, our main objective was to confirm Shewanella species role as progenitors of blaOXA-48-like genes. in silico analysis of Shewanella genomes was performed to detect blaOXA-48-like genes and context. Additionally, 43 environmental Shewanella spp. were characterized. Clonal relatedness was determined by BOX-PCR...
June 27, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28652234/meropenem-vaborbactam-tested-against-contemporary-gram-negative-isolates-collected-worldwide-during-2014-including-carbapenem-resistant-kpc-producing-multidrug-resistant-and-extensively-drug-resistant-enterobacteriaceae
#7
Mariana Castanheira, Michael D Huband, Rodrigo E Mendes, Robert K Flamm
We evaluated the activity of meropenem-vaborbactam against contemporary non-fastidious gram-negative clinical isolates, including resistant phenotypes and carbapenemase genotypes of Enterobacteriaceae Meropenem-vaborbactam (inhibitor at 8 μg/ml) and comparators were susceptibility tested using reference broth microdilution methods against 14,304 gram-negative clinical isolates collected worldwide during 2014. Carbapenemase encoding genes were screened by PCR/sequencing. Meropenem-vaborbactam (MIC50/90, ≤0...
June 26, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28642140/emergence-of-carbapenem-resistant-enterobacteriaceae-isolated-from-patients-in-a-university-hospital-in-saudi-arabia-epidemiology-clinical-profiles-and-outcomes
#8
Fawzia E Alotaibi, Elham E Bukhari, Maha M Al-Mohizea, Taghreed Hafiz, Eman Bin Essa, Yasmeen I AlTokhais
Carbapenemase-producing Enterobacteriaceae have been steadily spreading worldwide during the last decade. Nine patients were identified prospectively and were followed during their hospitalization course to identify the epidemiology, clinical profiles and outcomes. These patients had one or more cultures positive for a CRE isolate, contributing to a total of eleven positive cultures from various sites without including duplicates of isolates obtained from the same site. Isolates from these patients included five Klebseilla pneumoniae, three Escherichia coli, and one Enterobacter aerogenes...
June 19, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28639165/molecular-characterization-of-intestinal-carriage-of-carbapenem-resistant-enterobacteriaceae-among-inpatients-at-two-iranian-university-hospitals-first-report-of-co-production-of-bla-ndm-7-and-bla-oxa-48
#9
H Solgi, F Badmasti, Z Aminzadeh, C G Giske, M Pourahmad, F Vaziri, S A Havaei, F Shahcheraghi
Gastrointestinal colonization of carbapenem-resistant Enterobacteriaceae (CRE) could serve as a reservoir for the transmission of these pathogens in the clinical setting. The aim of this study was to investigate the intestinal carriage of CRE and to analyze risk factors for CRE carriage. Rectal swabs were collected from 95 patients at two Iranian university hospitals. CRE screening was performed using selective media (CHROMagar and MacConkey agar). Polymerase chain reaction (PCR) was used to detect carbapenemase-encoding genes...
June 21, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28637339/emergence-of-ceftazidime-avibactam-non-susceptibility-in-an-mdr-klebsiella-pneumoniae-isolate
#10
Anna Both, Henning Büttner, Jiabin Huang, Markus Perbandt, Cristina Belmar Campos, Martin Christner, Florian P Maurer, Stefan Kluge, Christina König, Martin Aepfelbacher, Dominic Wichmann, Holger Rohde
Background: Avibactam is a novel broad-range β-lactamase inhibitor active against Ambler class A (including ESBL and KPC) and some Ambler class C and D (e.g. OXA-48) enzymes. We here report on the emergence of ceftazidime/avibactam resistance in clinical, multiresistant, OXA-48 and CTX-M-14-producing Klebsiella pneumoniae isolate DT12 during ceftazidime/avibactam treatment. Methods and results: Comparative whole-genome sequence analysis identified two SNPs in the CTX-M-14-encoding gene leading to two amino acid changes (P170S and T264I)...
June 16, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28630202/identifying-spectra-of-activity-and-therapeutic-niches-for-ceftazidime-avibactam-and-imipenem-relebactam-against-carbapenem-resistant-enterobacteriaceae
#11
Ghady Haidar, Cornelius J Clancy, Liang Chen, Palash Samanta, Ryan K Shields, Barry N Kreiswirth, M Hong Nguyen
We determined imipenem, imipenem-relebactam, ceftazidime and ceftazidime-avibactam minimum inhibitory concentrations (MICs) against 100 CRE isolates that underwent whole genome sequencing. KPCs were the most common carbapenemases. Forty-six isolates carried ESBLs. With the addition of relebactam, imipenem susceptibility increased from 8% to 88%. With the addition of avibactam, ceftazidime susceptibility increased from 0% to 85%. Neither imipenem-relebactam nor ceftazidime-avibactam was active against MBL-producers...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28614760/abundance-of-carbapenemase-genes-blakpc-blandm-and-blaoxa-48-in-wastewater-effluents-from-tunisian-hospitals
#12
Emna Nasri, Jessica Subirats, Alexandre Sànchez-Melsió, Hedi Ben Mansour, Carles M Borrego, José Luis Balcázar
Carbapenems are β-lactam antibiotics with a broad spectrum of activity and are usually considered the last resort for the treatment of severe infections caused by multidrug-resistant pathogens. The clinically most significant carbapenemases are KPC, NDM, and OXA-48-like enzymes, whose genes have been increasingly reported worldwide in members of the family Enterobacteriaceae. In this study, we quantified the abundance of these genes in wastewater effluents from different Tunisian hospitals. The blaNDM and blaOXA-48-like genes were detected at similar concentrations in all hospital wastewater effluents...
June 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28610832/comparison-of-antimicrobial-activity-between-ceftolozane-tazobactam-and-ceftazidime-avibactam-against-multidrug-resistant-isolates-of-escherichia-coli-klebsiella-pneumoniae-and-pseudomonas-aeruginosa
#13
Adnan Alatoom, Hashim Elsayed, Karen Lawlor, Laila AbdelWareth, Rania El-Lababidi, Lysettee Cardona, Mohammad Mooty, Maria-Fernanda Bonilla, Ahmad Nusair, Imran Mirza
OBJECTIVE: This study compared the activity of ceftolozane-tazobactam and ceftazidime-avibactam against 120 bacterial strains, including extended-spectrum beta-lactamase (ESBL) producers, carbapenem-resistant Enterobacteriaceae (CRE), and Pseudomonas aeruginosa, isolated from patients admitted to Cleveland Clinic Abu Dhabi, United Arab Emirates. METHODS: In vitro susceptibility was tested using the Etest strip minimum inhibitory concentration (MIC) method, and PCR was used to characterize the carbapenemase enzymes produced by CRE strains...
June 10, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28607010/comparison-of-two-phenotypic-algorithms-to-detect-carbapenemase-producing-enterobacteriaceae
#14
Laurent Dortet, Sandrine Bernabeu, Camille Gonzalez, Thierry Naas
A novel algorithm designed for the screening of carbapenemase producing Enterobactericeae (CPE), based on faropenem and temocillin disks was compared to that of the French Society of Microbiology (CA-SFM), which is based on ticarcillin-clavulanate, imipenem and temocillin disks. Both algorithms presented comparable negative predictive values (98.6% vs 97.5%) for the CPE screening among carbapenem non-susceptible Enterobacteriaceae However, since 46.2% (n=49) of the CPEs were correctly identified as OXA-48-like producers by the faropenem/temocillin-based algorithm, it significantly decreased the number of complementary tests needed (42...
June 12, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28585170/rapid-and-simple-identification-of-carbapenemase-genes-bla-ndm-bla-oxa-48-bla-vim-bla-imp-14-and-bla-kpc-groups-in-gram-negative-bacilli-by-in-house-loop-mediated-isothermal-amplification-with-hydroxynaphthol-blue-dye
#15
Arpasiri Srisrattakarn, Aroonlug Lulitanond, Chotechana Wilailuckana, Nicha Charoensri, Lumyai Wonglakorn, Pimjai Saenjamla, Prajuab Chaimanee, Jureerut Daduang, Aroonwadee Chanawong
Carbapenem-resistant Enterobacteriaceae isolates by carbapenemase production are being reported globally with increasing frequency, leading to limited therapeutic options. We therefore developed a loop-mediated isothermal amplification method with hydroxynaphthol blue dye (LAMP-HNB) for rapid confirmation of bla NDM, bla OXA-48, bla VIM, bla IMP-14 and bla KPC groups. Sixty-two Enterobacteriaceae and Pseudomonas spp. isolates carrying various carbapenemase genes (28 bla NDM-1, 9 bla IMP-14a, 2 bla IMP-48, 1 bla IMP-1, 1 bla IMP-4, 1 bla IMP-9, 1 bla IMP-15, 4 bla VIM-2, 1 bla VIM-1, 1 bla IMP-14a & bla VIM-2, 7 bla KPC-2, 3 bla OXA-48 and 3 bla OXA-181) and 37 non-carbapenemase-producing Enterobacteriaceae isolates as confirmed by the PCR methods were included...
July 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28571980/effectiveness-of-cleaning-disinfection-wipes-and-sprays-against-multidrug-resistant-outbreak-strains
#16
Nikki Kenters, Elisabeth G W Huijskens, Sophie C J de Wit, Joost van Rosmalen, Andreas Voss
BACKGROUND: Hospital rooms play an important role in the transmission of several health care-associated pathogens. During the last few years, a number of innovative cleaning-disinfecting products have been brought to market. In this study, commercially available products combining cleaning and disinfection were compared, using 2 different application methods. The aim was to determine which product was most effective in simultaneous cleaning and disinfection of surfaces. METHODS: Seven cleaning-disinfecting wipes and sprays based on different active ingredients were tested for their efficacy in removal of microbial burden and proteins...
May 29, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28555403/dissemination-of-bla-oxa-370-gene-among-several-enterobacteriaceae-species-in-brazil
#17
C M Magagnin, F P Rozales, L Antochevis, L S Nunes, A S Martins, A L Barth, J M Sampaio, A P Zavascki
OXA-370 is a recently described OXA-48 variant that has only been described in a few Enterobacter spp. and Klebsiella pneumoniae isolates. The purpose of this study is to assess the prevalence of OXA-370-producing isolates in carbapenem-nonsusceptible Enterobacteriaceae recovered from 28 hospitals from Brazil. Real-time PCR was used to determine the presence of bla NDM-1, bla KPC-2, bla VIM-type, bla GES-type, bla OXA-48-like, and bla IMP-type genes. A total of 4,451 Enterobacteriaceae were screened. The gene bla OXA-48-like was detected in 74 (2...
May 30, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28550370/molecular-epidemiology-of-escherichia-coli-sequence-type-131-and-its-h30-h30-rx-subclones-recovered-from-extra-intestinal-infections-first-report-of-oxa-48-producing-st131-clone-from-iran
#18
Z Hojabri, M Mirmohammadkhani, F Kamali, K Ghassemi, S Taghavipour, O Pajand
Multidrug-resistant (MDR) O25b-ST131 clone of Escherichia coli is well established as a significant cause of extra-intestinal infections worldwide. However, there have been no studies about the prevalence of ST131 and its H30/H30Rx subclones from Iran. The prevalence of ST131 was 29.8% among phylogroups B2, D, and F of E.coli isolates recovered from extra-intestinal infections. Fifty-seven (90.4%) and six (9.6%) of isolates belonged to serogroups O25b and O16 respectively, and exhibited high rates of MDR (98...
May 27, 2017: European Journal of Clinical Microbiology & Infectious Diseases
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
#19
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/28533001/evaluation-of-the-rapidec%C3%A2-carba-np-and-%C3%AE-carba%C3%A2-tests-for-rapid-detection-of-carbapenemase-producing-enterobacteriaceae
#20
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
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