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Klebsiella pneumoniae pneumonia

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https://www.readbyqxmd.com/read/29244630/epidemiology-and-outcomes-of-bloodstream-infections-in-patients-with-solid-tumors-in-a-central-american-population-at-mexico-hospital-san-jose-costa-rica
#1
Jorge Calvo-Lon, Denis U Landaverde, Allan Ramos-Esquivel, Juan M Villalobos-Vindas
Purpose Bloodstream infections (BSIs) are an important cause of mortality in patients with solid tumors. We conducted a retrospective study to evaluate the epidemiologic profile and mortality of patients with solid tumors who have BSIs and were admitted to Mexico Hospital. This is the first study in Costa Rica and Central America describing the current epidemiologic situation. Methods We analyzed the infectious disease database for BSIs in patients with solid tumors admitted to Mexico Hospital from January 2012 to December 2014...
December 15, 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29243150/characterization-of-multiple-antibiotic-resistance-of-culturable-microorganisms-and-metagenomic-analysis-of-total-microbial-diversity-of-marine-fish-sold-in-retail-shops-in-mumbai-india
#2
Onkar A Naik, Ravindranath Shashidhar, Devashish Rath, Jayant R Bandekar, Archana Rath
Marine fish species were analyzed for culturable and total metagenomic microbial diversity, antibiotic resistance (AR) pattern, and horizontal gene transfer in culturable microorganisms. We observed a high AR microbial load of 3 to 4 log CFU g-1. Many fish pathogens like Providencia, Staphylococcus, Klebsiella pneumoniae, Enterobacter, Vagococcus, and Aeromonas veronii were isolated. Photobacterium and Vibrio were two major fish and human pathogens which were identified in the fish metagenome. Other pathogens that were identified were Shewanella, Acinetobacter, Psychrobacter, and Flavobacterium...
December 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29242763/optimization-of-a-resazurin-based-microplate-assay-for-large-scale-compound-screenings-against-klebsiella-pneumoniae
#3
Hyung Jun Kim, Soojin Jang
A new resazurin-based assay was evaluated and optimized using a microplate (384-well) format for high-throughput screening of antibacterial molecules against Klebsiella pneumoniae. Growth of the bacteria in 384-well plates was more effectively measured and had a > sixfold higher signal-to-background ratio using the resazurin-based assay compared with absorbance measurements at 600 nm. Determination of minimum inhibitory concentrations of the antibiotics revealed that the optimized assay quantitatively measured antibacterial activity of various antibiotics...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29241362/simplified-teixobactin-analogues-to-target-superbugs
#4
Ishwar Singh
Ishwar Singh speaks to Benjamin Walden, Commissioning Editor. Ishwar Singh is a Senior Lecturer in biological chemistry at the School of Pharmacy, University of Lincoln. Prior to Lincoln, he had held many prestigious fellowships such as the Alexander von Humboldt fellowship, Germany; and Senior Research Fellowship, DANIDA, Denmark and CSIR, India. He is an organic chemist. He has developed bioconjugations for DNA, RNA and polymer modifications. He is currently leading research in novel antimicrobials based on rational design against clinically important resistant bacteria (such as methicillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, mycobacteria, Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa), biologics delivery, peptides, sequence-selective DNA cross linking, nanoparticles modifications for drug delivery and diagnostic applications...
December 15, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29238934/treatment-outcome-of-non-carbapenemase-producing-carbapenem-resistant-klebsiella-pneumoniae-infections-a-multicenter-study-in-taiwan
#5
Chin-Fang Su, Chien Chuang, Yi-Tsung Lin, Yu-Jiun Chan, Jung-Chung Lin, Po-Liang Lu, Ching-Tai Huang, Jann-Tay Wang, Yin-Ching Chuang, L Kristopher Siu, Chang-Phone Fung
Carbapenem-resistant Klebsiella pneumoniae (CRKP) infections are associated with high mortality, and experiences with its treatment are usually based on carbapenemase-producing strains. Non-carbapenemase-producing CRKP is of clinical significance, but relevant studies are lacking. This nationwide study aimed to evaluate the outcome of antimicrobial therapy in patients with non-carbapenemase-producing CRKP infections. Patients with non-carbapenemase-producing CRKP infections were enrolled from 16 hospitals during January 2013 to December 2014 in Taiwan...
December 14, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29238932/risk-factors-and-clinical-outcomes-of-hypervirulent-klebsiella-pneumoniae-induced-bloodstream-infections
#6
Jiayang Li, Jianan Ren, Weiping Wang, Gefei Wang, Guosheng Gu, Xiuwen Wu, Ying Wang, Mei Huang, Jieshou Li
The prevalence of hypervirulent Klebsiella pneumoniae (hvKP) is high in China, but clinical characteristics and outcomes of hvKP induced bloodstream infections (BSIs) are not clear. The purpose of the present study was to determine the risk factors and clinical outcomes of hvKP-BSIs in populations admitted in a teaching hospital of Nanjing, China. The genetic characteristics and antibiotic resistance patterns of the hvKP strains were further analyzed. A retrospective study was conducted in 143 patients with K...
December 14, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29237086/enterobacteriaceae-producing-oxa-48-like-carbapenemases-in-poland-2013-january-2017
#7
R Izdebski, A Baraniak, D Zabicka, M Machulska, P Urbanowicz, J Fiett, E Literacka, K Bojarska, A Kozinska, B Zieniuk, W Hryniewicz, M Gniadkowski
Objectives: To analyse OXA-48 (OXA-48/181)-type carbapenemase-producing Enterobacteriaceae reported in Poland from 2013 until January 2017. Methods: Bacterial isolates were typed by PFGE and MLST. Genes coding for OXA-48/181 types and other β-lactamases were amplified and sequenced. Mobile elements with blaOXA-48/181-like genes were PCR mapped. blaOXA-48/181-carrying plasmids were characterized by nuclease S1-hybridization profiling, transfer assays and PCR-based replicon typing, while the chromosomal location of the genes was confirmed by the I-CeuI analysis...
December 9, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29237003/illumina-short-read-and-minion-long-read-wgs-to-characterize-the-molecular-epidemiology-of-an-ndm-1-serratia-marcescens-outbreak-in-romania
#8
H T T Phan, N Stoesser, I E Maciuca, F Toma, E Szekely, M Flonta, A T M Hubbard, L Pankhurst, T Do, T E A Peto, A S Walker, D W Crook, D Timofte
Background and Objectives: Serratia marcescens is an emerging nosocomial pathogen, and the carbapenemase blaNDM has been reported in several surveys in Romania. We aimed to investigate the molecular epidemiology of S. marcescens in two Romanian hospitals over 2010-15, including a neonatal NDM-1 S. marcescens outbreak. Methods: Isolates were sequenced using Illumina technology together with carbapenem-non-susceptible NDM-1-positive and NDM-1-negative Klebsiella pneumoniae and Enterobacter cloacae to provide genomic context...
December 8, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29236574/genetic-diversity-of-kpc-producing-escherichia-coli-klebsiella-oxytoca-serratia-marcescens-and-citrobacter-freundii-isolates-from-argentina
#9
Denise De Belder, Celeste Lucero, Melina Rapoport, Adriana Rosato, Diego Faccone, Alejandro Petroni, Fernando Pasteran, Ezequiel Albornoz, Alejandra Corso, Sonia A Gomez
The predominance of Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae was caused by the spread of ST258 clone. In Latin America, KPC was reported in 2006, with the isolation of genetically unrelated K. pneumoniae in Colombia. Since then, the expansion of blaKPC in either K. pneumoniae ST258 or other Enterobacteriaceae (ETB) species was increasingly reported. In this study, we characterized 89 KPC-producing Escherichia coli, Klebsiella oxytoca, Serratia marcescens, and Citrobacter freundii that were received between 2010 and 2014...
December 13, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29233256/analysis-of-oxa-204-carbapenemase-producing-enterobacteriaceae-reveals-possible-endoscopy-associated-transmission-france-2012-to-2014
#10
Anaïs Potron, Sandrine Bernabeu, Gaëlle Cuzon, Valérie Pontiès, Hervé Blanchard, Elise Seringe, Thierry Naas, Patrice Nordmann, Laurent Dortet
OXA-48-like beta-lactamase producing bacteria are now endemic in several European and Mediterranean countries. Among this carbapenemase family, the OXA-48 and OXA-181 variants predominate, whereas other variants such as OXA-204 are rarely reported. Here, we report the molecular epidemiology of a collection of OXA-204-positive enterobacterial isolates (n = 29) recovered in France between October 2012 and May 2014. This study describes the first outbreak of OXA-204-producing Enterobacteriaceae in Europe, involving 12 isolates of an ST90 Escherichia coli clone and nine isolates of an ST147 Klebsiella pneumoniae clone...
December 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29233221/lysozyme-s-lectin-like-characteristics-facilitates-its-immune-defense-function
#11
Ruiyan Zhang, Lisha Wu, Thomas Eckert, Monika Burg-Roderfeld, Miguel A Rojas-Macias, Thomas Lütteke, Vadim B Krylov, Dmitry A Argunov, Aritreyee Datta, Philipp Markart, Andreas Guenther, Bengt Norden, Roland Schauer, Anirban Bhunia, Mushira Abdelaziz Enani, Martin Billeter, Axel J Scheidig, Nikolay E Nifantiev, Hans-Christian Siebert
Interactions between human lysozyme (HL) and the lipopolysaccharide (LPS) of Klebsiella pneumoniae O1, a causative agent of lung infection, were identified by surface plasmon resonance. To characterize the molecular mechanism of this interaction, HL binding to synthetic disaccharides and tetrasaccharides representing one and two repeating units, respectively, of the O-chain of this LPS were studied. pH-dependent structural rearrangements of HL after interaction with the disaccharide were observed through nuclear magnetic resonance...
January 2017: Quarterly Reviews of Biophysics
https://www.readbyqxmd.com/read/29232335/endogenous-klebsiella-pneumoniae-endophthalmitis-in-northern-california
#12
Ryan A Shields, Stephen J Smith, Carolyn K Pan, Diana V Do
PURPOSE: To report the clinical features, treatment modalities, and visual outcomes in 12 eyes with endogenous Klebsiella pneumoniae endophthalmitis (EKPE). METHODS: The medical records of all patients diagnosed with EKPE at Stanford Hospital (Palo Alto, CA) and Santa Clara Valley County Hospital (Santa Clara, CA) from January 2000 to March 2017 were retrospectively reviewed. RESULTS: A total of 10 patients (12 eyes) were diagnosed with EKPE...
December 11, 2017: Retina
https://www.readbyqxmd.com/read/29232167/tigecycline-susceptibility-of-klebsiella-pneumoniae-complex-and-escherichia-coli-isolates-from-companion-animals-the-prevalence-of-tigecycline-nonsusceptible-k-pneumoniae-complex-including-internationally-expanding-human-pathogenic-lineages
#13
Toyotaka Sato, Kazuki Harada, Masaru Usui, Yuzo Tsuyuki, Tsukasa Shiraishi, Yutaka Tamura, Shin-Ichi Yokota
Transmission of tigecycline-nonsusceptible pathogenic Enterobacteriaceae from companion animals to human should be a concern because tigecycline is a last-line drug for treating multidrug-resistant Enterobacteriaceae in human medicine. However, tigecycline susceptibility of Enterobacteriaceae isolated from companion animals has not been investigated. In this study, we investigated the tigecycline susceptibility of Klebsiella pneumoniae complex and Escherichia coli isolates from dogs and cats, and evaluated their human pathogenicity potential...
December 12, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29232103/game-changers-new-%C3%AE-lactamase-inhibitor-combinations-targeting-antibiotic-resistance-in-gram-negative-bacteria
#14
Karen Bush
Recent regulatory approvals for the β-lactam inhibitor combinations of ceftazidime-avibactam and meropenem-vaborbactam have provided two novel therapeutic options for the treatment of multidrug-resistant infections caused by Gram-negative bacteria. Most importantly, these combination agents have satisfied an important medical need related to antibiotic-resistant Klebsiella pneumoniae that produce serine carbapenemases, especially the Klebsiella pneumoniae carbapenemase (KPC) enzymes. Both combinations contain non-β-lactam β-lactamase inhibitors of novel chemical classes not previously developed as antibacterial agents, the diazabicyclooctanes and cyclic boronic acid derivatives...
December 12, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29230684/imipenem-relebactam-and-meropenem-vaborbactam-two-novel-carbapenem-%C3%AE-lactamase-inhibitor-combinations
#15
REVIEW
George G Zhanel, Courtney K Lawrence, Heather Adam, Frank Schweizer, Sheryl Zelenitsky, Michael Zhanel, Philippe R S Lagacé-Wiens, Andrew Walkty, Andrew Denisuik, Alyssa Golden, Alfred S Gin, Daryl J Hoban, Joseph P Lynch, James A Karlowsky
Relebactam (formerly known as MK-7655) is a non-β-lactam, bicyclic diazabicyclooctane, β-lactamase inhibitor that is structurally related to avibactam, differing by the addition of a piperidine ring to the 2-position carbonyl group. Vaborbactam (formerly known as RPX7009) is a non-β-lactam, cyclic, boronic acid-based, β-lactamase inhibitor. The structure of vaborbactam is unlike any other currently marketed β-lactamase inhibitor. Both inhibitors display activity against Ambler class A [including extended-spectrum β-lactamases (ESBLs), Klebsiella pneumoniae carbapenemases (KPCs)] and class C β-lactamases (AmpC)...
December 12, 2017: Drugs
https://www.readbyqxmd.com/read/29230010/serotype-and-virulence-genes-of-klebsiella-pneumoniae-isolated-from-mink-and-its-pathogenesis-in-mice-and-mink
#16
Wang Jian-Li, Shang Yuan-Yuan, Guo Shou-Yu, Diao Fei-Fei, Yu Jia-Yu, Wei Xue-Hua, Zhao Yong-Feng, Jiang Shi-Jin, Xie Zhi-Jing
In the study, 15 K. pneumoniae strains were isolated from the mink experiencing respiratory distress in mideastern Shandong province, China, and the prevalence of K. pneumoniae in the sampled mink was 11.9% (15/126). Fourteen (93.33%) of the 15 K. pneumoniae isolates were identified as serotype K2 and hypermucoviscosity phenotype. The 12 virulence-associated genes of the K. pneumoniae isolates were tested. The prevalence of the wabG gene for the isolates were 100% (15/15), the ureA gene 100% (15/15), the rmpA gene 93...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29229976/a-novel-tn1696-like-composite-transposon-tn6404-harboring-bla-imp-4-in-a-klebsiella-pneumoniae-isolate-carrying-a-rare-esbl-gene-bla-sfo-1
#17
Kai Zhou, Wei Yu, Ping Shen, Haifeng Lu, Baohong Wang, John W A Rossen, Yonghong Xiao
Genetic determinants of a clinical Klebsiella pneumoniae isolate (KP1814) coproducing IMP-4 and a rare ESBL gene SFO-1 was investigated. KP1814 belongs to a novel sequence type (ST) assigned to ST2270. WGS identified four circular DNA sequences in KP1814, including two multidrug-resistance (MDR) plasmids, one virulence plasmid, and one circular form. The MDR plasmid pKP1814-1 (299.9 Kb) is untypeable, and carries two large mosaic multiresistance regions (MRRs). bla SFO-1 and bla IMP-4 co-exists on MRR1, and bla SFO-1 is associated with an IS/Tn-independent genetic context...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29229880/klebsiella-pneumoniae-antibiotic-resistance-identified-by-atomic-force-microscopy
#18
Vincenzo Ierardi, Paolo Domenichini, Silvia Reali, Gian Marco Chiappara, Gianluigi Devoto, Ugo Valbusa
In the last decade the detection of the resistance of bacteria to antibiotics treatment, developed by different kind of bacteria, is becoming a huge problem. We hereby present a different approach to the current problem of detection of bacteria resistance to antibiotics. Our aims were to use the atomic force microscopy (AFM) to investigate bacteria morphological changes in response to antibiotics treatment and explore the possibility of reducing the time required to obtain information on their resistance. In particular, we studied Klebsiella pneumoniae bacteria provided by the Lavagna Hospital ASL4 Liguria (Italy), where there are cases linked with antibiotics resistance of the Klebsiella pneumoniae...
December 2017: Journal of Biosciences
https://www.readbyqxmd.com/read/29229643/cystatin-9-and-c-a-novel-immunotherapy-that-protects-against-multi-drug-resistant-new-delhi-metallo-beta-lactamase-1-producing-klebsiella-pneumoniae
#19
Alex J Holloway, JiehJuen Yu, Bernard P Arulanandam, Sarah M Hoskinson, Tonyia Eaves-Pyles
Multidrug-resistant (MDR) bacterial pneumonia can induce dysregulated pulmonary and systemic inflammation leading to morbidity and mortality. Antibiotics to treat MDR pathogens do not function to modulate the extent and intensity of inflammation and can have serious side effects. Herein, we evaluate the efficacy of two human cysteine proteinase inhibitors, cystatin 9 and cystatin C, as a novel immunotherapeutic treatment to combat MDR New Delhi metallo-beta-lactamase-1 (NDM-1) producing Klebsiella pneumoniae (Kp)...
December 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29229637/elucidating-the-pharmacokinetics-pharmacodynamics-of-aerosolized-colistin-against-multidrug-resistant-acinetobacter-baumannii-and-klebsiella-pneumoniae-in-a-mouse-lung-infection-model
#20
Yu-Wei Lin, Qi Tony Zhou, Mei-Ling Han, Ke Chen, Nikolas J Onufrak, Jiping Wang, John D Turnidge, Benjamin P Howden, Alan Forrest, Hak-Kim Chan, Jian Li
Pharmacokinetics/pharmacodynamics (PK/PD) of aerosolized colistin was investigated against Acinetobacter baumannii and Klebsiella pneumoniae over 24 h in a neutropenic mouse lung infection model. Dose fractionation studies were performed over 2.64 to 23.8 mg/kg/day, and the data were fitted to a sigmoid inhibitory model. AUC/MIC in the epithelial lining fluid was the most predictive PK/PD index for aerosolized colistin against both pathogens. Our study provides important pharmacological information for optimizing aerosolized colistin...
December 11, 2017: Antimicrobial Agents and Chemotherapy
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