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https://www.readbyqxmd.com/read/28708458/effectiveness-of-a-double-carbapenem-regimen-in-a-kpc-producing-klebsiella-pneumoniae-infection-in-an-immunocompromised-patient
#1
Nuria Piedra-Carrasco, Lucia Miguel, Anna Fàbrega, Belén Viñado, David Campany, Alba Mir, María Laura Fox, Benito Almirante, Nieves Larrosa, Isabel Ruiz-Camps, Juan José González-López
The progressive increase of infections produced by extensively drug-resistant carbapenemase-producing Klebsiella pneumoniae (XDR-CPKP) represents an important threat to public health. Unfortunately, optimal therapeutic options are scarce. Retrospective studies have recommended combined therapy with more than one antibiotic and, more recently, a double-carbapenem regimen has been reported to be an effective alternative therapy. Here, we describe an episode of sepsis in an immunocompromised patient after allogeneic hematopoietic stem cell transplantation, caused by an XDR-CPKP...
July 14, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28702005/insights-into-a-novel-blakpc-2-encoding-incp-6-plasmid-reveal-carbapenem-resistance-circulation-in-several-enterobacteriaceae-species-from-wastewater-and-a-hospital-source-in-spain
#2
Yancheng Yao, Fernando Lazaro-Perona, Linda Falgenhauer, Aránzazu Valverde, Can Imirzalioglu, Lucas Dominguez, Rafael Cantón, Jesús Mingorance, Trinad Chakraborty
Untreated wastewater, particularly from hospitals and other healthcare facilities, is considered to be a reservoir for multidrug-resistant bacteria. However, its role in the spread of antibiotic resistances in the human population remains poorly investigated. We used whole genome sequencing to analyze 25 KPC-2-producing Enterobacteriaceae isolates from sewage water collected during a 3-year period and three clinical Citrobacter freundii isolates from a tertiary hospital in the same collection area in Spain...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28700049/molecular-detection-of-%C3%AE-lactamase-and-integron-genes-in-clinical-strains-of-klebsiella-pneumoniae-by-multiplex-polymerase-chain-reaction
#3
Mansour Sedighi, Masoumeh Halajzadeh, Rashid Ramazanzadeh, Noor Amirmozafari, Mohsen Heidary, Serve Pirouzi
INTRODUCTION: Infections caused by β-lactamase-producing gram-negative bacteria, such as Klebsiella pneumoniae, are increasing globally with high morbidity and mortality. The aim of the current study was to determine antimicrobial susceptibility patterns and the prevalence of antibiotic resistance genes (β-lactamase and integron genes) using multiplex PCR. METHODS: One-hundred K. pneumoniae isolates were collected from different clinical samples. Antibiotic susceptibility testing was performed with thirteen different antibiotics...
May 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28687975/prevalence-and-drug-resistance-characteristics-of-carbapenem-resistant-enterobacteriaceae-in-hangzhou-china
#4
Yan Yang, Jian Chen, Di Lin, Xujian Xu, Jun Cheng, Changgui Sun
With the abuse of antimicrobial agents in developing countries, increasing number of carbapenem-resistant Enterobacteriaceae (CRE) attracted considerable public concern. A retrospective study was conducted based on 242 CRE strains from a tertiary hospital in Hangzhou, China to investigate prevalence and drug resistance characteristics of CRE in southeast China. Bacterial species were identified. Antimicrobial susceptibility was examined by broth microdilution method or epsilometer test. Resistant β-lactamase genes were identified by polymerase chain reaction and sequencing...
July 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28676713/effect-of-the-meropenem-mic-on-the-killing-activity-of-meropenem-and-polymyxin-b-in-combination-against-kpc-producing-klebsiella-pneumoniae
#5
Brandon Kulengowski, Jeffrey J Campion, David J Feola, David S Burgess
No abstract text is available yet for this article.
July 5, 2017: Journal of Antibiotics
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
#6
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/28674063/first-report-of-klebsiella-oxytoca-strain-simultaneously-producing-ndm-1-imp-4-and-kpc-2-carbapenemases
#7
Juan Wang, Min Yuan, Hai Chen, Xia Chen, Yuanchun Jia, Xiong Zhu, Li Bai, Xue Bai, Séamus Fanning, Jinxing Lu, Juan Li
The nucleotide sequences of 5 plasmids from one Klebsiella oxytoca isolate were determined using the PacBio RS II system. Plasmid analysis revealed that blaNDM-1 was carried on an IncX3 plasmid. The blaIMP-4 and blaKPC-2 were located on an IncN and an IncP-6 plasmid, respectively. Comparative sequence analysis highlighted the successful spread of carbapenemase-harbouring plasmids among different enterobacterial species. It reports for the first time coproducing NDM-1, KPC-2 and IMP-4 carbapenemases on a K. oxytoca isolate...
July 3, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28670570/in-vitro-pharmacokinetics-pharmacodynamics-evaluation-of-fosfomycin-combined-with-amikacin-or-colistin-against-kpc2-producing-klebsiella-pneumoniae
#8
Wei Yu, Kai Zhou, Lihua Guo, Jinru Ji, Tianshui Niu, Tingting Xiao, Ping Shen, Yonghong Xiao
Objectives: The emergence of carbapenem-resistant Enterobacteriaceae, especially Klebsiella pneumoniae, has become a major concern in clinic settings. Combination therapy is gaining momentum to counter the secondary resistance and potential suboptimal efficacy of monotherapy. The aim of this study was to evaluate the bactericidal effect of fosfomycin (FM), amikacin (AMK), or colistin (COL) alone and combinations against KPC2-producing K. pneumoniae using dynamic model by simulating human pharmacokinetics in vitro...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28659886/molecular-epidemiology-and-risk-factors-of-carbapenem-resistant-klebsiella-pneumoniae-infections-in-eastern-china
#9
Bing Zheng, Yingxin Dai, Yang Liu, Weiyang Shi, Erkuan Dai, Yichao Han, Dandan Zheng, Yuetian Yu, Min Li
Background: The increasing prevalence of carbapenem-resistant Klebsiella pneumoniae (CRKP) poses an immediate threat to treatment worldwide. This retrospective study assessed the molecular epidemiology and determined the risk factors for and outcomes of CRKP infections in a general teaching hospital in Shanghai, China. Methods: From January 2013 to July 2015, 100 consecutive unique CRKP isolates isolated from hospitalized patients were collected. Isolates were screened for antibiotic resistance genes by polymerase chain reaction and molecular typing was performed by pulsed-field gel electrophoresis (PFGE)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28650688/multidrug-resistant-enterobacteriaceae-in-lebanese-hospital-wastewater-implication-in-the-one-health-concept
#10
Ziad Daoud, Jina Farah, Elie Salem Sokhn, Khalil El Kfoury, Elias Dahdouh, Khalil Masri, Claude Afif, Roula M Abdel-Massih, Ghassan M Matar
Extended-spectrum beta-lactamases (ESBL) and carbapenemase-producing organisms pose severe problems for hospitalized patients. In the absence of efficient sanitation and sewage disposal, the risks for transmission of hospital organisms into the community are high. Our objectives were to study the occurrence and mechanisms of resistance of multidrug-resistant gram-negative bacilli in two Lebanese hospital sewage treatment plants. Wastewater samples were collected, filtered, and cultivated on MacConckey+cefotaxime agars...
June 26, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28648647/in-vitro-antibacterial-activity-of-fosfomycin-combined-with-other-antimicrobials-against-kpc-producing-klebsiella-pneumoniae
#11
Wei Yu, Ping Shen, Zhang Bao, Kai Zhou, Beiwen Zheng, Jinru Ji, Lihua Guo, Chen Huang, Yonghong Xiao
The increasing prevalence of KPC-producing Klebsiella pneumoniae (KPC-Kp) strains poses a serious threat to patients. Therapeutic options are limited to colistin, fosfomycin, tigecycline and selected aminoglycosides. Although the combination of fosfomycin with other antimicrobials is recommended, data regarding possible synergistic activity in vitro and in vivo appear inconsistent. Here we report that five drug combinations (fosfomycin combined with imipenem, ertapenem, tigecycline, colistin or amikacin) had a significant additive effect against 136 KPC-Kp strains in an in vitro chequerboard assay...
June 22, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28643488/multidrug-resistance-mechanisms-of-carbapenem-resistant-klebsiella-pneumoniae-strains-isolated-in-chongqing-china
#12
Jinrong Yan, Shuli Pu, Xiaojiong Jia, Xiuyu Xu, Shuangshuang Yang, Jing Shi, Shan Sun, Liping Zhang
BACKGROUND: Carbapenem-resistant Klebsiella pneumoniae (CRKP) is considered a serious global threat. However, little is known regarding the multidrug resistance (MDR) mechanisms of CRKP. This study investigated the phenotypes and MDR mechanisms of CRKP and identified their clonal characteristics. METHODS: PCR and sequencing were utilized to identify antibiotic resistance determinants. Integron gene cassette arrays were determined by restriction fragment length polymorphism (RFLP) analysis...
September 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28642139/clinical-characteristics-and-epidemiology-of-sepsis-in-the-neonatal-intensive-care-unit-in-the-era-of-multi-drug-resistant-organisms-a-retrospective-review
#13
Dawood Yusef, Tala Shalakhti, Samah Awad, Hana'a Algharaibeh, Wasim Khasawneh
BACKGROUND: Sepsis in the neonatal intensive care unit (NICU) remains one of the most significant causes of morbidity and mortality, especially for preterm newborns. Multi-drug resistant organisms (MDROs) are emerging as important pathogens that cause neonatal sepsis in NICU. Therefore, studying the epidemiology, clinical features, and outcome caused by MDROs vs. non-MDROs, and identifying risk factors that may predispose patients to sepsis by MDROs are important. METHODS: Episodes of blood culture-proven sepsis (age: 0-90 days) in the NICU at our institution from January 2012 to December 2015 were retrospectively reviewed...
June 9, 2017: Pediatrics and Neonatology
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
#14
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/28638594/high-burden-of-antimicrobial-resistance-among-gram-negative-bacteria-causing-healthcare-associated-infections-in-a-critical-care-unit-of-nepal
#15
Narayan Prasad Parajuli, Subhash Prasad Acharya, Shyam Kumar Mishra, Keshab Parajuli, Basista Prasad Rijal, Bharat Mani Pokhrel
BACKGROUND: Healthcare associated infections (HCAI) and antimicrobial resistance are principal threats to the patients of intensive care units and are the major determining factors for patient outcome. They are associated with increased morbidity, mortality, excess hospitalization and financial costs. The present study is an attempt to investigate the spectrum and antimicrobial resistance of bacterial isolates involved in healthcare associated infections (HCAI) in the patients of a critical care unit at a tertiary care university hospital in Kathmandu, Nepal...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28637339/emergence-of-ceftazidime-avibactam-non-susceptibility-in-an-mdr-klebsiella-pneumoniae-isolate
#16
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/28614623/a-carbon-dot-based-fluorescent-nanosensor-for-simple-visualization-of-bacterial-nucleic-acids
#17
Ha Neul Lee, Jea-Sung Ryu, Cheong Shin, Hyun Jung Chung
A simple and facile method for sensing of nucleic acids is in great need for disease biomarker detection and diagnosis. Herein, a fluorescent nanosensor utilizing carbon dot nanoparticles is introduced that form visible precipitates in the presence of target DNA. Carbon dot nanoparticles are fabricated by microwave pyrolysis of polyethylenimine, which emits strong photoluminescence and can form precipitates when added to target DNA oligonucleotides. The precipitates can be easily visualized by UV illumination, and data can be acquired as images using a smartphone, which are analyzed for quantification...
June 14, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28598078/-the-transmission-of-kpc-2-gene-in-klebsiella-species
#18
Li-Juan Wu, Ting-Ting Wang, Qing-Yan He, Dan Zhao, Si-Shi Tang, Mei Kang, Chao He, Yi Xie
OBJECTIVES: To explore the mechanisms of imipenem resistance inKlebsiella spp. and the transmission of Klebsiella pneumoniae Carbapenemase-2(KPC-2) gene in Klebsiella species. METHODS: The imipenem resistant Klebsiella pneumoniae and Klebsiella oxytoca were isolated in the West China Hospital of Sichuan University in 2009/2010 and 2012/2013. Their minimal inhibitory concentration (MIC) was determined by agar dilution method. CARB ChromID plate and improved Hodge test were undertaken to detect carbapenemases resistant phenotype...
September 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28590820/activity-of-ceftazidime-avibactam-against-clinical-isolates-of-klebsiella-pneumoniae-including-kpc-carrying-isolates-endemic-to-new-york-city
#19
Nyla Manning, Gregory Balabanian, Michael Rose, David Landman, John Quale
In this report, we examined the (1) activity of ceftazidime-avibactam against clinical isolates Klebsiella pneumoniae, including those harboring blaKPC, (2) potential mechanisms leading to reduced susceptibility, and (3) activity of ceftazidime-avibactam when combined with other agents. Of 802 carbapenem-resistant isolates of K. pneumoniae gathered from New York City from 1999 to 2014, all were susceptible to ceftazidime-avibactam. Minimum inhibitory concentrations (MICs) were higher in isolates with K. pneumoniae, with the carbapenemase (KPC)-3 (compared to KPC-2), and those with a frameshift mutation in ompK35...
June 7, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28586386/differential-th17-response-induced-by-the-two-clades-of-the-pandemic-st258-klebsiella-pneumoniae-clonal-lineages-producing-kpc-type-carbapenemase
#20
Ann Maria Clemente, Giuseppe Castronovo, Alberto Antonelli, Marco Maria D'Andrea, Michele Tanturli, Eloisa Perissi, Sara Paccosi, Astrid Parenti, Federico Cozzolino, Gian Maria Rossolini, Maria Gabriella Torcia
The spread of KPC-type carbapenemases is mainly attributed to the global dissemination of Klebsiella pneumoniae (KP) strains belonging to the clonal group (CG) 258, including sequence type (ST) 258 and other related STs. Two distinct clades of CG258-KP have evolved, which differ mainly for the composition of their capsular polysaccharides, and recent studies indicate that clade 1 evolved from an ancestor of clade 2 by recombination of a genomic fragment carrying the capsular polysaccharide (cps) locus. In this paper, we investigated the ability of two ST258-KP strains, KKBO-1 and KK207-1, selected as representatives of ST258-KP clade 2 and clade 1, respectively, to activate an adaptive immune response using ex vivo-stimulation of PBMC from normal donors as an experimental model...
2017: PloS One
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