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https://www.readbyqxmd.com/read/27907871/fluorescent-probe-based-subcellular-distribution-of-cu-ii-ions-in-living-electrotrophs-isolated-from-cu-ii-reduced-biocathodes-of-microbial-fuel-cells
#1
Ye Tao, Hua Xue, Liping Huang, Peng Zhou, Wei Yang, Xie Quan, Jinxiu Yuan
Based on the four indigenous electrotrophs (Stenotrophomonas maltophilia JY1, Citrobacter sp. JY3, Pseudomonas aeruginosa JY5 and Stenotrophomonas sp. JY6) isolated from well adapted Cu(II)-reduced biocathodes of microbial fuel cells (MFCs), a rhodamine based Cu(II) fluorescent probe was used to imaginably and quantitatively track subcellular Cu(II) ions in these electrotrophs. Cathodic electrons led to more Cu(II) ions (14.3-30.1%) in the intracellular sites at operation time of 2-3h with Cu(II) removal rates of 2...
November 22, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27902429/plasmid-mediated-quinolone-resistance-determinants-among-gram-negative-bacteraemia-isolates-a-hidden-threat
#2
Athanasios Margaritis, Irene Galani, Marianthi Chatzikonstantinou, George Petrikkos, Maria Souli
The aim of the study was to investigate the prevalence of PMQR genes in an unselected collection of bloodstream isolates recovered over an 18-month period in a laboratory affiliated to a University Hospital in Athens, Greece and to assess their impact on the in vitro activity of ciprofloxacin and levofloxacin. Eight PMQR genes were screened by PCR and sequencing. All PMQR-positive isolates were submitted to isoelectric focusing for β-lactamase detection, conjugation or transformation, time-kill assays, MPC and inoculum effect evaluation...
November 28, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27881616/performance-of-vitek%C3%A2-2-for-antimicrobial-susceptibility-testing-of-acinetobacter-baumannii-pseudomonas-aeruginosa-and-stenotrophomonas-maltophilia-with-vitek%C3%A2-2-2009-fda-and-clsi-m100s-26th-edition-breakpoints
#3
April M Bobenchik, Eszter Deak, Janet A Hindler, Carmen L Charlton, Romney M Humphries
Performance of Vitek 2 AST-GN69 and AST-XN06 cards was compared to Clinical and Laboratory Standards Institute (CLSI) reference broth microdilution (BMD) for 99 isolates of Pseudomonas aeruginosa, 26 Acinetobacter baumannii and 11 Stenotrophomonas maltophilia In total 15 antimicrobials were evaluated, 11 for P. aeruginosa, 14 for A. baumannii, and 2 for S. maltophilia. Categorical agreement (CA) was assessed using both Vitek 2 breakpoints and 2016 CLSI M100S 26(th) edition breakpoints. Essential agreement for P...
November 23, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27870863/characteristics-of-aspergillus-fumigatus-in-association-with-stenotrophomonas-maltophilia-in-an-in-vitro-model-of-mixed-biofilm
#4
Elise Melloul, Stéphanie Luiggi, Leslie Anaïs, Pascal Arné, Jean-Marc Costa, Vincent Fihman, Benoit Briard, Eric Dannaoui, Jacques Guillot, Jean-Winoc Decousser, Anne Beauvais, Françoise Botterel
BACKGROUND: Biofilms are communal structures of microorganisms that have long been associated with a variety of persistent infections poorly responding to conventional antibiotic or antifungal therapy. Aspergillus fumigatus fungus and Stenotrophomonas maltophilia bacteria are examples of the microorganisms that can coexist to form a biofilm especially in the respiratory tract of immunocompromised patients or cystic fibrosis patients. The aim of the present study was to develop and assess an in vitro model of a mixed biofilm associating S...
2016: PloS One
https://www.readbyqxmd.com/read/27861524/factors-associated-with-worse-lung-function-in-cystic-fibrosis-patients-with-persistent-staphylococcus-aureus
#5
Sibylle Junge, Dennis Görlich, Martijn den Reijer, Bärbel Wiedemann, Burkhard Tümmler, Helmut Ellemunter, Angelika Dübbers, Peter Küster, Manfred Ballmann, Cordula Koerner-Rettberg, Jörg Große-Onnebrink, Eberhardt Heuer, Wolfgang Sextro, Jochen G Mainz, Jutta Hammermann, Joachim Riethmüller, Ute Graepler-Mainka, Doris Staab, Bettina Wollschläger, Rüdiger Szczepanski, Antje Schuster, Friedrich-Karl Tegtmeyer, Sivagurunathan Sutharsan, Alexandra Wald, Jerzy-Roch Nofer, Willem van Wamel, Karsten Becker, Georg Peters, Barbara C Kahl
BACKGROUND: Staphylococcus aureus is an important pathogen in cystic fibrosis (CF). However, it is not clear which factors are associated with worse lung function in patients with persistent S. aureus airway cultures. Our main hypothesis was that patients with high S. aureus density in their respiratory specimens would more likely experience worsening of their lung disease than patients with low bacterial loads. METHODS: Therefore, we conducted an observational prospective longitudinal multi-center study and assessed the association between lung function and S...
2016: PloS One
https://www.readbyqxmd.com/read/27853518/metagenomic-analysis-of-medicinal-cannabis-samples-pathogenic-bacteria-toxigenic-fungi-and-beneficial-microbes-grow-in-culture-based-yeast-and-mold-tests
#6
Kevin McKernan, Jessica Spangler, Yvonne Helbert, Ryan C Lynch, Adrian Devitt-Lee, Lei Zhang, Wendell Orphe, Jason Warner, Theodore Foss, Christopher J Hudalla, Matthew Silva, Douglas R Smith
Background: The presence of bacteria and fungi in medicinal or recreational Cannabis poses a potential threat to consumers if those microbes include pathogenic or toxigenic species. This study evaluated two widely used culture-based platforms for total yeast and mold (TYM) testing marketed by 3M Corporation and Biomérieux, in comparison with a quantitative PCR (qPCR) approach marketed by Medicinal Genomics Corporation. Methods: A set of 15 medicinal Cannabis samples were analyzed using 3M and Biomérieux culture-based platforms and by qPCR to quantify microbial DNA...
2016: F1000Research
https://www.readbyqxmd.com/read/27851405/1770-successful-treatment-of-stenotrophomonas-maltophilia-pneumonia-in-a-preterm-neonatal-patient
#7
Pooja Shah, Sabrina Malik
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27848015/biodegradation-of-polycyclic-aromatic-hydrocarbons-by-an-acidophilic-stenotrophomonas-maltophilia-strain-ajh1-isolated-from-a-mineral-mining-site-in-saudi-arabia
#8
P Arulazhagan, K Al-Shekri, Q Huda, J J Godon, J M Basahi, D Jeyakumar
The present study aims at analyzing the degradation of polycyclic aromatic hydrocarbons (PAHs) at acidic conditions (pH = 2) by acidophilic Stenotrophomonas maltophilia strain AJH1 (KU664513). The strain AJH1 was obtained from an enrichment culture obtained from soil samples of mining area in the presence of PAH as sole sources of carbon and energy. Strain AJH1was able to degrade low (anthracene, phenanthrene, naphthalene, fluorene) and high (pyrene, benzo(e)pyrene and benzo(k)fluoranthene) molecular weight PAHs in acidophilic mineral salt medium at pH 2, with removal rates of up to 95% (LMW PAH) and 80% (HMW PAH), respectively...
November 16, 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27835761/correlation-between-circuital-current-cu-ii-reduction-and-cellular-electron-transfer-in-eab-isolated-from-cu-ii-reduced-biocathodes-of-microbial-fuel-cells
#9
Jingya Shen, Liping Huang, Peng Zhou, Xie Quan, Gianluca Li Puma
The performance of four indigenous electrochemically active bacteria (EAB) (Stenotrophomonas maltophilia JY1, Citrobacter sp. JY3, Pseudomonas aeruginosa JY5 and Stenotrophomonas sp. JY6) was evaluated for Cu(II) reduction on the cathodes of microbial fuel cells (MFCs). These EAB were isolated from well adapted mixed cultures on the MFC cathodes operated for Cu(II) reduction. The relationship between circuital current, Cu(II) reduction rate, and cellular electron transfer processes was investigated from a mechanistic point of view using X-ray photoelectron spectroscopy, scanning electronic microscopy coupled with energy dispersive X-ray spectrometry, linear sweep voltammetry and cyclic voltammetry...
November 5, 2016: Bioelectrochemistry
https://www.readbyqxmd.com/read/27833606/surveillance-of-dihydropteroate-synthase-genes-in-stenotrophomonas-maltophilia-by-lamp-implications-for-infection-control-and-initial-therapy
#10
Jin Zhao, Yubin Xing, Wei Liu, Wentao Ni, Chuanqi Wei, Rui Wang, Yunxi Liu, Youning Liu
Stenotrophomonas maltophilia is a common nosocomial pathogen that causes high morbidity and mortality. Because of its inherent extended antibiotic resistance, therapeutic options for S. maltophilia are limited, and sulfamethoxazole/trimethoprim (SXT) is the only first-line antimicrobial recommended. However, with the spread of dihydropteroate synthase (sul1 and sul2) genes, global emergence of SXT resistance has been reported. There is an urgent need to develop a rapid and sensitive but cost-efficient method to monitor the dissemination of sul genes...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27833412/computed-tomography-findings-of-community-acquired-stenotrophomonas-maltophilia-pneumonia-in-an-immunocompetent-patient-a-case-report
#11
Yoon Ki Cha, Jeung Sook Kim, Seong Yeon Park, Jin Young Oh, Jae Hyun Kwon
Stenotrophomonas maltophilia (S. maltophilia) is a rare, but globally emerging gram-negative multiple-drug-resistant organism usually found in a nosocomial setting in immunocompromised patients. To our best knowledge, computed tomography (CT) features of community-acquired S. maltophilia pneumonia have not been previously reported in an immunocompetent patient. Herein, we presented the CT findings of a previous healthy 56-year-old male with S. maltophilia pneumonia.
November 2016: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/27822692/genetic-and-biochemical-characterization-of-rhizobacterial-strains-and-their-potential-use-in-combination-with-chelants-for-assisted-phytoremediation
#12
Cicatelli Angela, Guarino Francesco, Baldan Enrico, Castiglione Stefano
Copper and zinc are essential micronutrients in plants but, at high concentrations, they are toxic. Assisted phytoremediation is an emerging "green" technology that aims to improve the efficiency of tolerant species to remove metals from soils through the use of chelants or microorganisms. Rhizobacteria can promote plant growth and tolerance and also affect the mobility, bioavailability, and complexation of metals. A pot experiment was conducted to evaluate the phytoremediation effectiveness of sunflowers cultivated in a Cu- and Zn-spiked soil, in the presence or absence of bacterial consortium and/or chelants...
November 7, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27798695/genotypic-and-phenotypic-characterization-of-stenotrophomonas-maltophilia-strains-from-a-pediatric-tertiary-care-hospital-in-serbia
#13
Haowa Madi, Jovanka Lukić, Zorica Vasiljević, Marjan Biočanin, Milan Kojić, Branko Jovčić, Jelena Lozo
BACKGROUND: Stenotrophomonas maltophilia is an environmental bacterium and an opportunistic pathogen usually associated with healthcare-associated infections, which has recently been recognized as a globally multi-drug resistant organism. The aim of this study was genotyping and physiological characterization of Stenotrophomonas maltophilia isolated in a large, tertiary care pediatric hospital in Belgrade, Serbia, hosting the national reference cystic fibrosis (CF) center for pediatric and adult patients...
2016: PloS One
https://www.readbyqxmd.com/read/27769905/improved-method-for-effective-screening-of-acc-1-aminocyclopropane-1-carboxylate-deaminase-producing-microorganisms
#14
Chandrashekhar Patil, Rahul Suryawanshi, Sunil Koli, Satish Patil
Aminocyclopropane-1-carboxylate deaminase (ACCD) producing microorganisms support plant growth under a variety of biotic and abiotic stress conditions such as drought, soil salinity, flooding, heavy metal pollution and phyto-pathogen attack. Available screening methods for ACCD give idea only about its primary microbial ACCD activity than the actual potential. In the present investigation, we have simply improved screening method by incorporating pH indicator dyes (phenol red and bromothymol blue) in ACC containing medium...
October 18, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27757793/changes-in-fatty-acid-composition-of-stenotrophomonas-maltophilia-kb2-during-co-metabolic-degradation-of-monochlorophenols
#15
Agnieszka Nowak, Izabela Greń, Agnieszka Mrozik
The changes in the cellular fatty acid composition of Stenotrophomonas maltophilia KB2 during co-metabolic degradation of monochlorophenols in the presence of phenol as well as its adaptive mechanisms to these compounds were studied. It was found that bacteria were capable of degrading 4-chlorophenol (4-CP) completely in the presence of phenol, while 2-chlorophenol (2-CP) and 3-chlorophenol (3-CP) they degraded partially. The analysis of the fatty acid profiles indicated that adaptive mechanisms of bacteria depended on earlier exposure to phenol, which isomer they degraded, and on incubation time...
December 2016: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/27756813/stenotrophomonas-maltophilia-outer-membrane-vesicles-elicit-a-potent-inflammatory-response-in-vitro-and-in-vivo
#16
Yoo Jeong Kim, Hyejin Jeon, Seok Hyeon Na, Hyo Il Kwon, Gati Noble Selasi, Asiimwe Nicholas, Tae In Park, Sang Hwa Lee, Je Chul Lee
Stenotrophomonas maltophilia has become one of the most prevalent opportunistic pathogens in hospitalized patients. This microorganism secretes outer membrane vesicles (OMVs), but the pathogenesis of S. maltophilia as it relates to OMVs has not been characterized. This study investigated the cytotoxic activity of S. maltophilia OMVs and their ability to induce inflammatory responses both in vitro and in vivo S. maltophilia ATCC 13637 and two clinical isolates were found to secrete spherical OMVs during in vitro culture...
October 17, 2016: Pathogens and Disease
https://www.readbyqxmd.com/read/27751311/infective-endocarditis-caused-by-stenotrophomonas-maltophilia-a-report-of-two-cases-and-review-of-literature
#17
Shaik Subhani, Amar N Patnaik, Ramachandra Barik, Lalita Nemani
Stenotrophomonas maltophilia is known for nosocomial habitat. Infective endocarditis due to this organism is rare and challenging because of resistance to multiple broad-spectrum antibiotic regimens. Early detection and appropriate antibiotic based on culture sensitivity reports are the key to its management. We report the diagnosis, treatment, and outcome of two cases of infective endocarditis caused by S. maltophilia.
September 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27746770/stenotrophomonas-maltophilia-phenotypic-and-genotypic-diversity-during-a-10-year-colonization-in-the-lungs-of-a-cystic-fibrosis-patient
#18
Arianna Pompilio, Valentina Crocetta, Dipankar Ghosh, Malabika Chakrabarti, Giovanni Gherardi, Luca Agostino Vitali, Ersilia Fiscarelli, Giovanni Di Bonaventura
The present study was carried out to understand the adaptive strategies developed by Stenotrophomonas maltophilia for chronic colonization of the cystic fibrosis (CF) lung. For this purpose, 13 temporally isolated strains from a single CF patient chronically infected over a 10-year period were systematically characterized for growth rate, biofilm formation, motility, mutation frequencies, antibiotic resistance, and pathogenicity. Pulsed-field gel electrophoresis (PFGE) showed over time the presence of two distinct groups, each consisting of two different pulsotypes...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27730363/coexistence-of-free-living-amoebae-and-bacteria-in-selected-south-african-hospital-water-distribution-systems
#19
P Muchesa, M Leifels, L Jurzik, K B Hoorzook, T G Barnard, C Bartie
Pathogenic free-living amoebae (FLA), such as Naegleria fowleri, Balamuthia mandrillaris and Acanthamoeba species isolated from aquatic environments have been implicated in central nervous system, eye and skin human infections. They also allow the survival, growth and transmission of bacteria such as Legionella, Mycobacteria and Vibrio species in water systems. The purpose of this study was to investigate the co-occurrence of potentially pathogenic FLA and their associated bacteria in hospital water networks in Johannesburg, South Africa...
October 12, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27727983/stenotrophomonas-maltophilia-endocarditis-a-rare-case-report
#20
Jalal Ahmed, Vishwanath Moturu, Varthika Goel, Mohan Vb
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
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