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stenotrophomonas maltophilia

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https://www.readbyqxmd.com/read/28102223/global-and-local-selection-acting-on-the-pathogen-stenotrophomonas-maltophilia-in-the-human-lung
#1
Hattie Chung, Tami D Lieberman, Sara O Vargas, Kelly B Flett, Alexander J McAdam, Gregory P Priebe, Roy Kishony
Bacterial populations diversify during infection into distinct subpopulations that coexist within the human body. Yet, it is unknown to what extent subpopulations adapt to location-specific selective pressures as they migrate and evolve across space. Here we identify bacterial genes under local and global selection by testing for spatial co-occurrence of adaptive mutations. We sequence 552 genomes of the pathogen Stenotrophomonas maltophilia across 23 sites of the lungs from a patient with cystic fibrosis. We show that although genetically close isolates colocalize in space, distant lineages with distinct phenotypes separated by adaptive mutations spread throughout the lung, suggesting global selective pressures...
January 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28098548/nosocomial-infections-with-imp-19-producing-pseudomonas-aeruginosa-linked-to-contaminated-sinks-france
#2
Lucie Amoureux, Karena Riedweg, Angélique Chapuis, Julien Bador, Eliane Siebor, André Péchinot, Marie-Lorraine Chrétien, Claire de Curraize, Catherine Neuwirth
We isolated IMP-19-producing Pseudomonas aeruginosa from 7 patients with nosocomial infections linked to contaminated sinks in France. We showed that blaIMP-19 was located on various class 1 integrons among 8 species of gram-negative bacilli detected in sinks: P. aeruginosa, Achromobacter xylosoxidans, A. aegrifaciens, P. putida, Stenotrophomonas maltophilia, P. mendocina, Comamonas testosteroni, and Sphingomonas sp.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28096165/in-vitro-activity-of-ceftolozane-tazobactam-against-multidrug-resistant-non-fermenting-gram-negative-bacilli-isolated-from-patients-with-cystic-fibrosis
#3
Patrick Grohs, Gary Taieb, Philippe Morand, Iheb Kaibi, Isabelle Podglajen, Marie Lavollay, Jean-Luc Mainardi, Fabrice Compain
Ceftolozane-tazobactam was tested against 58 multidrug-resistant non-fermenting Gram-negative bacilli (35 Pseudomonas aeruginosa, 11 Achromobacter xylosoxydans and 12 Stenotrophomonas maltophilia) isolated from cystic fibrosis patients and compared to ceftolozane alone, ceftazidime, meropenem and piperacillin-tazobactam. Ceftolozane-tazobactam was the most active agent against P. aeruginosa but was inactive against A. xylosoxydans and S. maltophilia In time-kill experiments ceftolozane-tazobactam had complete bactericidal activity against 2/6 (33%) clinical isolates...
January 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28090041/clinical-characteristics-of-stenotrophomonas-maltophilia-bacteremia-a-regional-report-and-a-review-of-a-japanese-case-series
#4
Hirotaka Ebara, Hideharu Hagiya, Yuto Haruki, Eisei Kondo, Fumio Otsuka
Objective Stenotrophomonas maltophilia is an emerging nosocomial pathogen that causes fatal infections in critically ill or immunocompromised patients. S. maltophilia bacteremia (SMB) is a rare condition, and its clinical characteristics in Japanese settings are not well known. Methods The medical charts of patients with SMB were retrospectively reviewed at two medical facilities (Okayama University Hospital and Tsuyama Chuo Hospital) for seven years. The data were analyzed along with those previously reported from other Japanese facilities...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28032486/current-situation-of-antimicrobial-resistance-and-genetic-differences-in-stenotrophomonas-maltophilia-complex-isolates-by-multilocus-variable-number-of-tandem-repeat-analysis
#5
Ji Young Rhee, Jae Hoon Song, Kwan Soo Ko
BACKGROUND: Stenotrophomonas maltophilia is one of several opportunistic pathogens of growing significance. Several studies on the molecular epidemiology of S. maltophilia have shown clinical isolates to be genetically diverse. MATERIALS AND METHODS: A total of 121 clinical isolates tentatively identified as S. malophilia from seven tertiary-care hospitals in Korea from 2007 to 2011 were included. Species and groups were identified using partial gyrB gene sequences and antimicrobial susceptibility testing was performed using a broth microdilution method...
December 2016: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28018304/identification-of-electrode-respiring-hydrocarbonoclastic-bacterial-strain-stenotrophomonas-maltophilia-mk2-highlights-the-untapped-potential-for-environmental-bioremediation
#6
Krishnaveni Venkidusamy, Mallavarapu Megharaj
Electrode respiring bacteria (ERB) possess a great potential for many biotechnological applications such as microbial electrochemical remediation systems (MERS) because of their exoelectrogenic capabilities to degrade xenobiotic pollutants. Very few ERB have been isolated from MERS, those exhibited a bioremediation potential toward organic contaminants. Here we report once such bacterial strain, Stenotrophomonas maltophilia MK2, a facultative anaerobic bacterium isolated from a hydrocarbon fed MERS, showed a potent hydrocarbonoclastic behavior under aerobic and anaerobic environments...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28004139/genome-shuffling-of-stenotrophomonas-maltophilia-ok-5-for-improving-the-degradation-of-explosive-rdx-hexahydro-1-3-5-trinitro-1-3-5-triazine
#7
Bheong-Uk Lee, Moon-Seop Choi, Dong-Min Kim, Kye-Heon Oh
A genome-shuffled Stenotrophomonas maltophilia strain showing the enhanced ability of RDX degradation was constructed, and its characteristics were compared with those of the wild-type one. The shuffled strain was able to completely degrade 25, 50, and 75 µM RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) within 10, 30, and 50 days, respectively. However, it took 30 and 70 days for the wild-type strain to degrade 25 and 50 µM RDX, respectively, and at day 70, the strain degraded only 67% of 75 µM RDX...
February 2017: Current Microbiology
https://www.readbyqxmd.com/read/28000030/colonization-pressure-as-a-risk-factor-of-icu-acquired-multidrug-resistant-bacteria-a-prospective-observational-study
#8
J Masse, A Elkalioubie, C Blazejewski, G Ledoux, F Wallet, J Poissy, S Preau, S Nseir
The primary objective of this study was to evaluate the impact of colonization pressure on intensive care unit (ICU)-acquired multidrug resistant bacteria (MDRB). All patients hospitalized for more than 48 h in the ICU were included in this prospective observational study. MDRB were defined as methicillin resistant Staphylococcus aureus, Pseudomonas aeruginosa resistant to ceftazidime or imipenem, Gram-negative bacilli producing extended-spectrum beta-lactamases (ESBL), and all strains of Acinetobacter baumannii and Stenotrophomonas maltophilia...
December 20, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27994915/intravenous-colistin-use-for-multidrug-resistant-gram-negative-infections-in-pediatric-patients
#9
Ayşe Karaaslan, Eren Çağan, Eda Kepenekli Kadayifci, Serkan Atıcı, Gülşen Akkoç, Nurhayat Yakut, Sevliya Öcal Demir, Ahmet Soysal, Mustafa Bakır
BACKGROUND: The emergence of infections due to multidrug-resistant Gram-negative bacilli (MDR-GNB) has led to the resurrection of colistin use. The data on colistin use and drug-related adverse effects in children are scarce. AIMS: In this study, we aimed to evaluate the clinical efficacy and safety of colistin use in critically ill pediatric patients. STUDY DESIGN: This study has a retrospective study design. METHODS: Sixty-one critically ill children were identified through the department's patient files archive during the period from January 2011 to November 2014...
November 2016: Balkan Medical Journal
https://www.readbyqxmd.com/read/27981921/emerging-trends-of-bloodstream-infections-a-six-year-study-at-a-paediatric-tertiary-care-hospital-in-kabul
#10
Tariq Mahmud Tariq, Esmatullah Rasool
OBJECTIVE: To determine the frequency of pathogens causing bloodstream infections and evaluate their trends and antibiogram patterns among in-patients in a paediatric tertiary care centre. STUDY DESIGN: Descriptive study. PLACE AND DURATION OF STUDY: French Medical Institute for Mothers and Children (FMIC), Kabul, Afghanistan in two phases, from January 2010 to December 2015. METHODOLOGY: Results of blood cultures from suspected cases of sepsis admitted in the FMIC, from January 2010 to December 2012 (Period-1), and from January 2013 to December 2015 (Period-2) were completed...
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27940061/hemodialyzer-reuse-and-gram-negative-bloodstream-infections
#11
Chris Edens, Jacklyn Wong, Meghan Lyman, Kyle Rizzo, Duc Nguyen, Michela Blain, Sam Horwich-Scholefield, Heather Moulton-Meissner, Erin Epson, Jon Rosenberg, Priti R Patel
BACKGROUND: Clusters of bloodstream infections caused by Burkholderia cepacia and Stenotrophomonas maltophilia are uncommon, but have been previously identified in hemodialysis centers that reprocessed dialyzers for reuse on patients. We investigated an outbreak of bloodstream infections caused by B cepacia and S maltophilia among hemodialysis patients in clinics of a dialysis organization. STUDY DESIGN: Outbreak investigation, including matched case-control study...
December 7, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27923523/polysorbate-80-and-polymyxin-b-inhibit-stenotrophomonas-maltophilia-biofilm
#12
Adam M Malinowski, Bryan M McClarty, Carolyn Robinson, William Spear, Maria Sanchez, Timothy C Sparkes, Joanna S Brooke
Stenotrophomonas maltophilia is an opportunistic multiple-drug-resistant human pathogen that forms biofilms on implanted medical devices. We examined the potential inhibitory activity of polysorbate 80 and polymyxin B against S. maltophilia. A combination of subMIC polymyxin B and polysorbate 80 was the most effective inhibitor of growth and biofilm formation.
February 2017: Diagnostic Microbiology and Infectious Disease
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
#13
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...
February 2017: Bioresource Technology
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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