keyword
MENU ▼
Read by QxMD icon Read
search

Kpc klebsiella

keyword
https://www.readbyqxmd.com/read/28425875/occurrence-of-qnrb1-and-qnrb12-genes-mutation-in-gyra-and-ramr-and-expression-of-efflux-pumps-in-isolates-of-klebsiella-pneumoniae-carriers-of-blakpc-2
#1
Alexsandra Maria Lima Scavuzzi, Maria Amélia Vieira Maciel, Heloísa Ramos Lacerda de Melo, Luiz Carlos Alves, Fábio André Brayner, Ana Catarina Souza Lopes
PURPOSE: The occurrence of quinolone-resistance genes (qnrA, qnrB and qnrS), the presence of mutations in gyrA, gyrB and parC, as well as the expression of efflux pumps (acrB and acrF) and mutations in the gene ramR. METHODOLOGY: Were investigated in 30 blaKPC-2-positive isolates of Klebsiella pneumoniae taken from infection and colonization in hospital patients from Recife-PE, Brazil. The detection of the qnr, acrB and acrF genes and analysis of the mutations in ramR and the quinolone-resistance-determining regions of gyrA, gyrB and parC were performed by PCR followed by DNA sequencing...
April 21, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28402500/evaluation-of-the-aid-carbapenemase-line-probe-assay-for-rapid-detection-and-identification-of-carbapenemase-genes-in-gram-negative-bacilli
#2
Guido V Bloemberg, Andrea Braun-Kiewnick, Jan Tedrup, Carla Meijerink, Elena Durer, Claudia Ritter, Peter M Keller, Michael Hombach
Objectives: This study evaluated the AID carbapenemase line probe assay (LPA) for the detection and identification of carbapenem resistance genes in Enterobacteriaceae and other Gram-negative bacilli (GNB) using bacterial cultures and DNA extracts directly from patient urine samples. Methods: The AID carbapenemase LPA detects 13 different carbapenemase genes. Test probe accuracy was verified for using clinical Enterobacteriaceae isolates harbouring bla KPC , bla VIM , bla NDM , bla GIM , bla AIM , bla SPM , bla IMP and bla OXA-48 and a well-characterized set of Escherichia coli DH5α strains transformed with the vector plasmid pUC57- kan harbouring bla BIC , bla SIM , bla DIM , bla IMI-3 , bla IMI-1 and bla NMC-A ...
April 11, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28397615/modifiable-risk-factors-for-the-spread-of-klebsiella-pneumoniae-carbapenemase-producing-enterobacteriaceae-among-long-term-acute-care-hospital-patients
#3
Koh Okamoto, Michael Y Lin, Manon Haverkate, Karen Lolans, Nicholas M Moore, Shayna Weiner, Rosie D Lyles, Donald Blom, Yoona Rhee, Sarah Kemble, Louis Fogg, David W Hines, Robert A Weinstein, Mary K Hayden
OBJECTIVE To identify modifiable risk factors for acquisition of Klebsiella pneumoniae carbapenemase-producing Enterobacteriaceae (KPC) colonization among long-term acute-care hospital (LTACH) patients. DESIGN Multicenter, matched case-control study. SETTING Four LTACHs in Chicago, Illinois. PARTICIPANTS Each case patient included in this study had a KPC-negative rectal surveillance culture on admission followed by a KPC-positive surveillance culture later in the hospital stay. Each matched control patient had a KPC-negative rectal surveillance culture on admission and no KPC isolated during the hospital stay...
April 11, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28397613/know-thy-self-know-thy-enemy-a-current-survey-and-a-forecast-for-kpc-producing-klebsiella-pneumoniae-resistance-among-inpatients-in-southern-brazil
#4
Leandro Reus Rodrigues Perez
No abstract text is available yet for this article.
April 11, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28396547/resistance-to-ceftazidime-avibactam-in-klebsiella-pneumoniae-due-to-porin-mutations-and-the-increased-expression-of-kpc-3
#5
Romney M Humphries, Peera Hemarajata
We reported the first clinical case of a ceftazidime-avibactam resistant KPC-3-producing Klebsiella pneumoniae (1), from a patient with no prior history of ceftazidime-avibactam therapy.….
April 10, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28389354/treating-complicated-carbapenem-resistant-enterobacteriaceae-infections-with-ceftazidime-avibactam-a-retrospective-study-with-molecular-strain-characterisation
#6
Fiorella Krapp, Jennifer L Grant, Sarah H Sutton, Egon A Ozer, Viktorija O Barr
Ceftazidime/avibactam (CAZ/AVI) is the first antimicrobial agent with activity against carbapenem-resistant Enterobacteriaceae (CRE) approved by the US Food and Drug Administration (FDA). Notably, human clinical outcome data for this indication are limited. Therefore, a retrospective study was performed to evaluate the clinical outcomes and bacterial genomic characteristics of patients hospitalised at a tertiary medical centre with CRE infections treated for the first time with CAZ/AVI. From a total of 44 patients with CRE infections, 6 patients were treated with CAZ/AVI...
April 4, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28389093/risk-factors-for-kpc-producing-enterobacteriaceae-acquisition-and-infection-in-a-healthcare-setting-with-possible-local-transmission-a-case-control-study
#7
K M Cronin, Y S Poy Lorenzo, M E Olenski, A E Bloch, K Visvanathan, M J Waters, K L Buising
BACKGROUND: Reports of Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (KPC-Kp) in Australia were previously uncommon, with cases imported sporadically by travellers from higher prevalence countries. AIM: The study institution reported the first outbreak of KPC-Kp in Australia. The aim of this study was to identify risk factors for KPC-Kp colonization and infection using a matched case-control study. METHODS: The study included all hospitalized patients with KPC-Kp colonization or infection from January 2012 to September 2015...
February 16, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28388065/molecular-basis-of-substrate-recognition-and-product-release-by-the-klebsiella-pneumoniae-carbapenemase-kpc-2
#8
Orville Antonio Pemberton, Xiujun Zhang, Yu Chen
Carbapenem-resistant Enterobacteriaceae (CRE) are resistant to most β-lactam antibiotics due to production of the KPC-2 class A β-lactamase. Here we present the first product complex crystal structures of KPC-2 with β-lactam antibiotics, containing hydrolyzed cefotaxime and faropenem. They provide experimental insights into substrate recognition by KPC-2 and its unique cephalosporinase/carbapenemase activity. These structures also represent the first product complexes for a wild type serine β-lactamase, elucidating the product release mechanism of these enzymes in general...
April 7, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28380016/carbapenemase-producing-enterobacteriaceae-recovered-from-a-spanish-river-ecosystem
#9
Núria Piedra-Carrasco, Anna Fàbrega, William Calero-Cáceres, Thais Cornejo-Sánchez, Maryury Brown-Jaque, Alba Mir-Cros, Maite Muniesa, Juan José González-López
The increasing resistance to carbapenems is an alarming threat in the fight against multiresistant bacteria. The dissemination properties of antimicrobial resistance genes are supported by their detection in a diverse population of bacteria, including strains isolated from the environment. The objective of this study was to investigate the presence of carbapenemase-producing Enterobacteriaceae (CPE) collected from a river ecosystem in the Barcelona metropolitan area (Spain). Identification of β-lactamases and other resistance determinants was determined as was the antimicrobial susceptibility profile...
2017: PloS One
https://www.readbyqxmd.com/read/28373185/enhanced-klebsiella-pneumoniae-carbapenemase-kpc-expression-from-a-novel-tn4401-deletion
#10
Anita Cheruvanky, Nicole Stoesser, Anna E Sheppard, Derrick W Crook, Paul S Hoffman, Erin Weddle, Joanne Carroll, Costi D Sifri, Weidong Chai, Katie Barry, Girija Ramakrishnan, Amy J Mathers
The Klebsiella pneumoniae carbapenemase gene (blaKPC) is typically located within the mobile transposon Tn4401 Enhanced KPC expression has been associated with deletions in the putative promoter region upstream of blaKPC Illumina sequences from blaKPC-positive clinical isolates from a single institution were mapped to a Tn4401b reference sequence, which carries no deletions. The novel isoform Tn4401h (188bp deletion [lsqb]between istB and blaKPC[rsqb]) was present in 14% (39/281) clinical isolates. MICs for Escherichia coli strains containing plasmids with Tn4401a and Tn4401h were more resistant to meropenem (≥16, ≥16), ertapenem (≥8, 4) and cefepime (≥64, 4) than E...
April 3, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28333331/multiregional-dissemination-of-kpc-producing-klebsiella-pneumoniae-st258-st512-genotypes-in-poland-2010-14
#11
Anna Baraniak, Radoslaw Izdebski, Dorota Zabicka, Katarzyna Bojarska, Sandra Górska, Elzbieta Literacka, Janusz Fiett, Waleria Hryniewicz, Marek Gniadkowski
Objectives: In 2008-09, the KPC carbapenemase epidemiology in Poland was dominated by a Klebsiella pneumoniae ST258 KPC-2 outbreak in Warsaw and its administrative region. The aim of this study was to analyse the situation in 2010-14, with a focus on new outbreaks in other parts of the country. Methods: KPCs were detected in all suspected isolates by PCR. The detailed study was performed on 173 isolates from 2010 to 2012, and included PFGE and MLST, PCR identification of K...
March 9, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333323/high-ceftazidime-hydrolysis-activity-and-porin-ompk35-deficiency-contribute-to-the-decreased-susceptibility-to-ceftazidime-avibactam-in-kpc-producing-klebsiella-pneumoniae
#12
Zhen Shen, Baixing Ding, Meiping Ye, Peng Wang, Yingmin Bi, Shi Wu, Xiaogang Xu, Qinglan Guo, Minggui Wang
Objectives: To investigate mechanisms for the decreased susceptibility to ceftazidime/avibactam in KPC-producing Klebsiella pneumoniae (KPC-KP). Methods: A total of 24 isolates, 8 each with ceftazidime/avibactam MICs of 4-8, 1-2 and ≤0.5 mg/L, were randomly selected from 214 clinical isolates of KPC-KP, and the β-lactamase hydrolysis activity and porin expression profiles were determined. Plasmid profile and relative expression and copy number of the bla KPC gene were also analysed...
March 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28320716/in-vitro-activity-of-imipenem-relebactam-against-gram-negative-eskape-pathogens-isolated-by-clinical-laboratories-in-the-united-states-in-2015-results-from-the-smart-global-surveillance-program
#13
Sibylle H Lob, Meredith A Hackel, Krystyna M Kazmierczak, Katherine Young, Mary R Motyl, James A Karlowsky, Daniel F Sahm
Relebactam (formerly MK-7655) is an inhibitor of class A and C β-lactamases, including Klebsiella pneumoniae carbapenemase (KPC), and is currently in clinical development in combination with imipenem/cilastatin. Using Clinical and Laboratory Standards Institute (CLSI) defined broth microdilution methodology, we evaluated the in vitro activities of imipenem-relebactam, imipenem, and seven routinely tested parenteral antimicrobial agents against gram-negative ESKAPE pathogens (Pseudomonas aeruginosa, n = 845; Klebsiella pneumoniae, n = 689; Enterobacter spp...
March 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28298454/in-vitro-activity-of-imipenem-against-carbapenemase-positive-enterobacteriaceae-smart-global-surveillance-program-2008-2014
#14
James A Karlowsky, Sibylle H Lob, Krystyna M Kazmierczak, Robert E Badal, Katherine Young, Mary R Motyl, Daniel F Sahm
The Study for Monitoring Antimicrobial Resistance Trends (SMART) global surveillance program collected 103,960 isolates of Enterobacteriaceae from 2008 to 2014. From this isolate collection all ertapenem-non-susceptible isolates (MIC, ≥1 μg/ml; n = 3,428) and 9,371 isolates of Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, and Proteus mirabilis with an ertapenem-susceptible extended-spectrum β-lactamase (ESBL)-positive phenotype were assessed for the presence of common carbapenemase genes using the Check-MDR CT101 microarray (Check-Points, Wageningen, the Netherlands) and published multiplex PCR assays...
March 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28295617/carbapenemases-producing-klebsiella-pneumoniae-in-hospitals-of-two-regions-of-southern-italy
#15
Carla Calia, Carlo Pazzani, Marta Oliva, Maria Scrascia, Piero Lovreglio, Carmen Capolongo, Anna Maria Dionisi, Adriana Chiarelli, Rosa Monno
Carbapenem-resistant Klebsiella pneumoniae infections are reported with increasing frequency elsewhere in the world, representing a worrying phenomenon for global health. In Italy, there are hotspot data on the diffusion and type of carbapenemase-producing Enterobacteriaceae and K. pneumoniae in particular, with very few data coming from Apulia and Basilicata, two regions of Southern Italy. This study was aimed at characterizing by phenotypic and genotypic methods carbapenem-resistant K. pneumoniae isolated from several Hospitals of Apulia and Basilicata, Southern Italy...
March 15, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28291671/molecular-characterization-of-kpc-producing-klebsiella-pneumoniae-isolated-from-patients-in-a-public-hospital-in-caracas-venezuela
#16
Aura Dayana Falco Restrepo, Mariel Alexandra Velásquez Nieves, Howard Takiff
INTRODUCTION: Klebsiella pneumoniae carbapenemase (KPC)-producing bacteria are amongst the most important causative agents of nosocomial infections worldwide. Isolates of this bacterium have been identified in Venezuela but little is known about their local spread. The aim of this study was to perform the molecular characterization of KPC-producing strains isolated from 2012 to 2013 in a public hospital in Caracas, Venezuela. METHODS: Twenty-two K. pneumoniae clinical isolates phenotypically classified as KPC producing were subjected to PCR screening for the presence of blaKPC genes and their location within transposon Tn4401...
March 11, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28242667/in-vitro-selection-of-meropenem-resistance-among-ceftazidime-avibactam-resistant-meropenem-susceptible-klebsiella-pneumoniae-isolates-with-variant-kpc-3-carbapenemases
#17
Ryan K Shields, M Hong Nguyen, Ellen G Press, Liang Chen, Barry N Kreiswirth, Cornelius J Clancy
Ceftazidime-avibactam resistance is mediated by blaKPC-3 mutations, which restore carbapenem susceptibility. We subjected blaKPC-3 mutant (n=5) and wild-type (n=2) K. pneumoniae isolates to serial meropenem passage. Meropenem MICs against all isolates increased. Ompk36 porin mutations evolved in 5 isolates, including those with wild-type blaKPC-3 In different passage lineages, blaKPC-3 mutations reverted to wild-type, were replaced by new mutations, or were retained. Carbapenem treatment of ceftazidime-avibactam resistant K...
February 27, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28223379/mutations-in-blakpc-3-that-confer-ceftazidime-avibactam-resistance-encode-novel-kpc-3-variants-that-function-as-extended-spectrum-%C3%AE-lactamases
#18
Ghady Haidar, Cornelius J Clancy, Ryan K Shields, Binghua Hao, Shaoji Cheng, M Hong Nguyen
We identified four blaKPC-3 mutations in ceftazidime-avibactam resistant clinical Klebsiella pneumoniae isolates, corresponding to D179Y, T243M, D179Y/T243M, and EL165 KPC-3 variants. Using site-directed mutagenesis and transforming vectors into Escherichia coli, we conclusively demonstrated that mutant blaKPC-3 encoded enzymes that functioned as extended-spectrum β-lactamases; mutations directly conferred higher MICs of ceftazidime-avibactam MICs, and decreased MICs of carbapenems and other β-lactams. Impact was strongest for the D179Y mutant, highlighting the importance of the KPC Ω-loop...
February 21, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28219824/characterisation-of-the-first-kpc-2-producing-klebsiella-pneumoniae-st340-from-peru
#19
Gertrudis Horna, Jorge Velasquez, Nathaly Fernández, Jesus Tamariz, Joaquim Ruiz
OBJECTIVES: The aim of this study was to characterise a KPC-carrying Klebsiella pneumoniae isolate from a Peruvian hospital setting. METHODS: The identity of the isolate was confirmed by amplification and sequencing of the 16S rRNA gene, and the antibiotic resistance profile was determined by disk diffusion and automated methods The sequence type (ST) and phylogenetic group were established by PCR. The presence of different β-lactamase genes was determined, including blaMBL, blaKPC, blaCTX-M, blaSHV, blaOXA-1-like, blaOXA-2-like, blaOXA-5-like, blaOXA-48-like and blaTEM and up to six different plasmid-encoded AmpC genes as well as class 1 integrons...
February 20, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28215914/fecal-carriage-of-mdros-in-a-population-of-lebanese-elderly-dynamics-and-impact-on-bacterial-fitness
#20
Caren Challita, Elias Dahdouh, Michel Attieh, Iman Dandachi, Elio Ragheb, Roy Taoutel, Carl Tanba, Ziad Daoud
Muti-Drug Resistant Organisms (MDROs) are problematic all over the world, especially in Lebanon. High fecal carriage rates of MDR Enterobacteriaceae were reported from Lebanese nursing homes. Some studies show that MDROs have a fitness cost as compared to sensitive isolates. In this study, the competitive growth of MDR Escherichia coli obtained from fecal samples from elderly is assessed. Fecal swabs from ten elderly patients from a Lebanese nursing home were obtained between June and December, 2015. Isolates were identified by API 20E and antimicrobial susceptibilities were determined...
February 16, 2017: Journal of Infection and Public Health
keyword
keyword
117151
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"