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https://www.readbyqxmd.com/read/29925644/multiplex-pcr-analysis-for-the-rapid-detection-of-klebsiella-pneumoniae-carbapenem-resistant-st258-11-and-hypervirulent-st23-65-86-375-strains
#1
Fangyou Yu, Jingnan Lv, Siqiang Niu, Hong Du, Yi-Wei Tang, Johann D D Pitout, Robert A Bonomo, Barry N Kreiswirth, Liang Chen
Carbapenem-resistant and hypervirulent Klebsiella pneumoniae have emerged recently. These strains are both hypervirulent and multidrug resistant, and may also be highly transmissible and able to cause severe infections in both the hospital and in the community. Clinical and public health need is required for a rapid and comprehensive molecular detection assay to identify and track their spread and provide timely infection control information. Here we develop a rapid multiplex PCR assay capable of distinguishing K...
June 20, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29891605/-in-vitro-activity-of-ceftazidime-avibactam-against-carbapenem-resistant-and-hypervirulent-klebsiella-pneumoniae-isolates
#2
Fangyou Yu, Jingnan Lv, Siqiang Niu, Hong Du, Yi-Wei Tang, Robert A Bonomo, Barry N Kreiswirth, Liang Chen
Carbapenem-resistant and hypervirulent Klebsiella pneumoniae (CR-hvKp) strains have emerged while antimicrobial treatment options remain limited. Herein, we tested the in vitro activity of ceftazidime-avibactam and other comparator antibiotics against 65 CR-hvKp isolates. Ceftazidime-avibactam, colistin and tigecycline are highly active in vitro against CR-hvKp isolates (MIC90 ≤ 1μg/ml), including KPC-2-producing ST11 CR-hvKp. Based upon previous clinical experience and the in vitro data presented herein, we posit that ceftazidime-avibactam is a considered therapeutic option against CR-hvKp infections...
June 11, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29885368/antimicrobial-susceptibility-microbiological-and-epidemiologic-characteristics-of-hypermucoviscous-klebsiella-pneumoniae-strains-in-a-tertiary-hospital-at-hangzhou-in-china
#3
Chen Qiong, Zhou Jia-Wei, Qiu Chun-Ning, Wang Min-Min, Wang Xian-Jun, Ruan Zhi, Fan Jian-Zhong
OBJECTIVES: Hypermucoviscous Klebsiella pneumoniae (HMKP) has been increasingly recovered in clinical isolates. This study sought to examine the microbiological and epidemiologic characteristics of HMKP strains in a tertiary hospital at Hangzhou in China. METHODS: HMKP isolates were collected and identified via matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF). A string test was performed for the hypermucoviscous phenotype...
June 6, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29883490/resistome-of-carbapenem-and-colistin-resistant-klebsiella-pneumoniae-clinical-isolates
#4
Sara Lomonaco, Matthew A Crawford, Christine Lascols, Ruth E Timme, Kevin Anderson, David R Hodge, Debra J Fisher, Segaran P Pillai, Stephen A Morse, Erum Khan, Molly A Hughes, Marc W Allard, Shashi K Sharma
The emergence and dissemination of carbapenemases, bacterial enzymes able to inactivate most β-lactam antibiotics, in Enterobacteriaceae is of increasing concern. The concurrent spread of resistance against colistin, an antibiotic of last resort, further compounds this challenge further. Whole-genome sequencing (WGS) can play a significant role in the rapid and accurate detection/characterization of existing and emergent resistance determinants, an essential aspect of public health surveillance and response activities to combat the spread of antimicrobial resistant bacteria...
2018: PloS One
https://www.readbyqxmd.com/read/29881543/whole-genome-sequence-revealed-the-fine-transmission-map-of-carbapenem-resistant-klebsiella-pneumonia-isolates-within-a-nosocomial-outbreak
#5
Wenjun Sui, Haijian Zhou, Pengcheng Du, Lijun Wang, Tian Qin, Mei Wang, Hongyu Ren, Yanfei Huang, Jing Hou, Chen Chen, Xinxin Lu
Background: Carbapenem-resistant Klebsiella pneumoniae (CRKP) is a major cause of nosocomial infections worldwide. The transmission route of CRKP isolates within an outbreak is rarely described. This study aimed to reveal the molecular characteristics and transmission route of CRKP isolates within an outbreak of nosocomial infection. Methods: Collecting case information, active screening and targeted environmental monitoring were carried out. The antibiotic susceptibility, drug-resistant genes, molecular subtype and whole genome sequence of CRKP strains were analyzed...
2018: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29873627/emergence-and-nosocomial-spread-of-st11-carbapenem-resistant-klebsiella-pneumoniae-co-producing-oxa-48-and-kpc-2-in-a-regional-hospital-in-taiwan
#6
Chih-Ming Chen, Ming-Kai Guo, Se-Chin Ke, Yi-Pei Lin, Chia-Ru Li, Hong Thuy Vy Nguyen, Lii-Tzu Wu
PURPOSE: Carbapenem-resistant Klebsiella pneumoniae (CRKP) has emerged as a major challenge for global healthcare systems. The objectives of this study were to determine the nosocomial spread of CRKP clones and analyse the molecular characteristics of CRKP in our hospital. METHODOLOGY: Ninety-eight non-duplicated clinical CRKP isolates were collected from March 2014-June 2015. Clinical, demographic and microbiological data of patients with CRKP were reviewed. Pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing were applied to investigate the genetic relationship between the 98 isolates...
June 6, 2018: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29800340/emergence-of-an-xdr-and-carbapenemase-producing-hypervirulent-klebsiella-pneumoniae-strain-in-taiwan
#7
Yen-Hua Huang, Sheng-Hua Chou, Syun-Wun Liang, Chung-En Ni, Yi-Tsung Lin, Yi-Wei Huang, Tsuey-Ching Yang
Background: Carbapenemase-producing Klebsiella pneumoniae causes high mortality owing to the limited therapeutic options available. Here, we investigated an emergent carbapenem-resistant K. pneumoniae strain with hypervirulence found among KPC-2-producing strains in Taiwan. Methods: KPC-producing K. pneumoniae strains were collected consecutively from clinical specimens at the Taipei Veterans General Hospital between January 2012 and December 2014. Capsular types and the presence of rmpA/rmpA2 were analysed, and PFGE and MLST performed using these strains...
May 24, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29782210/colonization-with-enterobacteriaceae-producing-esbls-ampcs-and-oxa-48-in-wild-avian-species-spain-2015-2016
#8
Jesús Oteo, Aida Mencía, Verónica Bautista, Natalia Pastor, Noelia Lara, Fernando González-González, Francisco Javier García-Peña, José Campos
Antibiotic resistance is a global threat of complex and changeable epidemiology. The role of wild birds in the dissemination of antibacterial resistance might be underestimated. We studied the cloacal colonization by cefotaxime-resistant Enterobacteriaceae in 668 wild birds in Spain. Eighty-eight wild birds (13.2%) of 28 species carried cefotaxime-resistant isolates; 58 of them (8.7%) carried extended-spectrum β-lactamases (ESBLs) and 15 (2.5%) plasmid-mediated AmpCs of the blaCIT family. The 58 ESBLs belonged to the CTX-M-1 group (63...
May 21, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29781594/-monoclonal-spread-of-multi-drug-resistant-ctx-m-15-producing-klebsiella-pneumoniae-impact-of-measures-to-control-the-outbreak
#9
M A Asencio Egea, M Huertas Vaquero, C Muñoz-Cuevas, J Gaitán Pitera, O Herráez Carrera, P Alcázar Carmona, H D Patiño Ortega, M Franco Huerta, C Román Ortiz, M C Conde García, R Carranza González, J R Barberá, V Bautista Sánchez
OBJECTIVE: To describe an outbreak of multi-drug resistant extended-spectrum β-lactamases-producing Klebsiella pneumoniae (MDR-ESBL-KPN) and the impact of measures for its control. METHODS: We reviewed the patients´ clinical records with MDR-ESBL-KPN isolation during 2013-2016 with resistance to fluoroquinolones, aminoglycosides, fosfomycin, and nitrofurantoin; susceptible to imipenem, meropenem, colistin, and tigecycline and variable to ertapenem and cotrimoxazole (Vitek-2)...
May 18, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/29753130/clonal-dissemination-of-carbapenemase-producing-klebsiella-pneumoniae-two-distinct-sub-lineages-of-sequence-type-11-carrying-bla-kpc-2-and-bla-oxa-48
#10
Min-Chi Lu, Hui-Ling Tang, Chien-Shun Chiou, Yao-Chen Wang, Ming-Ko Chiang, Yi-Chyi Lai
OBJECTIVES: The global spread of carbapenem-resistant Klebsiella pneumoniae (CR-Kp) has become a massive threat to human health. We here investigated the clonal relatedness of CR-Kp strains in central Taiwan. METHODS: CR-Kp were prospectively collected from inpatients referred to Chung Shan Medical University Hospital (CSMUH) during Sep. 2011 to Dec. 2015. The presence of carbapenemase genes, including blaKPC-2 , blaVIM-1 , blaNDM-1 , and blaOXA-48 was analyzed with PCR and sequence determination...
May 9, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29698126/whole-genome-sequencing-of-ndm-1-producing-st11-klebsiella-pneumoniae-isolated-in-a-private-laboratory-in-greece
#11
Georgios Meletis, Fani Chatzopoulou, Dimitrios Chatzidimitriou, Fani Tsingerlioti, Christina Botziori, Georgios Tzimagiorgis, Lemonia Skoura
The emergence and spread of NDM-1-encoding Klebsiella pneumoniae is causing worldwide concern, whereas a second epicenter of their dissemination after the Indian subcontinent is thought to be located in the Balkans. In this study, the complete genome sequencing of an NDM-1-producing ST11 K. pneumoniae isolated in a private laboratory in Greece is presented. The genome sequencing was performed on Illumina MiniSeq. Multilocus Sequence Typing was determined using a BLAST-based approach whereas antimicrobial resistance genes and plasmid replicons were identified by ResFinder and PlasmidFinder respectively...
April 26, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29680295/rodents-are-carriers-of-clostridioides-difficile-strains-similar-to-those-isolated-from-piglets
#12
Carlos Augusto de Oliveira, Michelle de Paula Gabardo, Roberto Maurício Carvalho Guedes, Fabrice Poncet, Dominique S Blanc, Francisco Carlos Faria Lobato, Rodrigo Otávio Silveira Silva
Features of Clostridioides difficile transmission in swine and the role of rodents as C. difficile reservoir are not clear. To investigate if rodents can carry strains of C. difficile that are genetically similar to those isolated from swine, 97 fecal samples from neonatal piglets and 41 intestinal contents from rodents were collected in two farms. All samples were subjected to C. difficile culture and the presence of A/B toxins in piglet feces were accessed by commercial enzyme imunoassay (EIA). C. difficile isolates were typed by double- (DLST) and multi-locus sequence typing (MLST)...
June 2018: Anaerobe
https://www.readbyqxmd.com/read/29675006/the-rapid-emergence-of-tigecycline-resistance-in-bla-kpc-2-harboring-klebsiella-pneumoniae-as-mediated-in-vivo-by-mutation-in-teta-during-tigecycline-treatment
#13
Xiaoxing Du, Fang He, Qiucheng Shi, Feng Zhao, Juan Xu, Ying Fu, Yunsong Yu
Tigecycline is one of the last resort treatments for carbapenem-resistant Klebsiella pneumoniae (CRKP) infections. Tigecycline resistance often occurs during the clinical treatment of CRKP, yet its mechanism has still not been clearly elucidated. This study presents an analysis of a tigecycline resistance mechanism that developed in clinical isolates from a 56-year-old female patient infected with CRKP during tigecycline treatment. Consecutive clonal consistent K. pneumoniae isolates were obtained during tigecycline treatment...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29662886/high-prevalence-of-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-among-clinical-isolates-from-cats-and-dogs-admitted-to-a-veterinary-hospital-in-switzerland
#14
Anna Lena Zogg, Sabrina Simmen, Katrin Zurfluh, Roger Stephan, Sarah N Schmitt, Magdalena Nüesch-Inderbinen
Objectives: This study aimed to identify and characterize extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae among clinical samples of companion animals. Methods: A total of 346 non-duplicate Enterobacteriaceae isolates were collected between 2012 and 2016 from diseased cats ( n  = 115) and dogs ( n  = 231). The presence of bla ESBL , PMQR genes, and the azithromycin resistance gene mph(A) was confirmed by PCR and sequencing of bla genes...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29661874/characterization-of-extensively-or-pandrug-resistant-st147-and-st101-oxa-48-producing-klebsiella-pneumoniae-isolates-causing-bloodstream-infections-in-icu-patients
#15
Kalliope Avgoulea, Vincenzo Di Pilato, Olympia Zarkotou, Samanta Sennati, Leda Politi, Antonio Cannatelli, Katerina Themeli-Digalaki, Tommaso Giani, Athanassios Tsakris, Gian Maria Rossolini, Spyros Pournaras
Carbapenem-resistant Klebsiella pneumoniae cause important healthcare-associated infections worldwide. An outbreak of ST11 OXA-48-producing K. pneumoniae isolates (OXA-48-Kp) occurred in Tzaneio Hospital in 2012 and was contained until 2014, when OXA-48-Kp reemerged. The present study involved 19 bloodstream infection (BSI) OXA-48-Kp recovered from 19 ICU patients hospitalized between August 2014 and July 2016. MICs were determined by broth microdilution. β-lactamase genes were detected by PCR. All isolates were typed by PFGE/MLST and 10 representative isolates by next generation sequencing (NGS)...
April 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29660729/biogas-liquid-digestate-grown-chlorella-sp-for-biocrude-oil-production-via-hydrothermal-liquefaction
#16
Hugang Li, Meng Wang, Xinfeng Wang, Yuanhui Zhang, Haifeng Lu, Na Duan, Baoming Li, Dongming Zhang, Taili Dong, Zhidan Liu
Microalgae can not only purify and recover the nutrients from wastewater, but also be harvested as wet biomass for the production of biocrude oil via hydrothermal liquefaction (HTL). Chlorella sp. cultivated in the ultrafiltration (UF) membrane treated anaerobic digestion (AD) liquid digestate of chicken manure was used as the feedstock in this study. The present study characterized the products and investigated the elemental migration during HTL of Chlorella sp. fed with AD effluent wastewater (WW) and BG11 standard medium (ST) in 100mL and 500mL reactors under different operational conditions...
September 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29584568/high-prevalence-of-ctx-m-15-type-extended-spectrum-%C3%AE-lactamase-among-ampc-%C3%AE-lactamase-producing-klebsiella-pneumoniae-isolates-causing-bacteremia-in-korea
#17
Min Kyeong Cha, Cheol-In Kang, So Hyun Kim, Doo Ryeon Chung, Kyong Ran Peck, Nam Yong Lee, Jae-Hoon Song
We investigated the antimicrobial susceptibility, the genotypic distributions of extended-spectrum β-lactamase (ESBL) and AmpC genes, and the molecular epidemiology of AmpC-producing Klebsiella pneumoniae (AmpC-KP) isolates causing bacteremia. Among 260 K. pneumoniae clinical isolates included in this study, plasmid-mediated AmpC β-lactamases were found in 20.7% (54/260), which included DHA-1 (96.3%, 52/54), CMY-2 (3.7%, 2/54), and CMY-10 (1.9%, 1/54). One isolate also produced DHA-1 along with CMY-2. Of the 54 AmpC-KP isolates, 31 isolates (57...
March 27, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29571840/dissemination-of-carbapenem-resistant-klebsiella-pneumoniae-harboring-kpc-carrying-plasmid-pkpc_p16-a-pkpc_lk30-variant-in-northern-taiwan
#18
Jiann-Yuan Chen, Ming-Li Liou, Han-Yueh Kuo, Chia-Wei Lu, Yi-Chieh Lai, Yun-Yu Lin, Chang-Hua Chen
The prevalence of carbapenem-resistant Klebsiella pneumoniae (CRKP) was up to 30% between 2014 and 2016 in the study hospital. Of these 77 CRKP isolates, 22 isolates with sequence type ST11 carried the new pKPC_P16 plasmid, a pKPC_LK30 variant, and were widely disseminated between 2014 and 2015 in northern Taiwan.
February 22, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29558475/molecular-epidemiology-and-drug-resistant-mechanism-in-carbapenem-resistant-klebsiella-pneumoniae-isolated-from-pediatric-patients-in-shanghai-china
#19
Xingyu Zhang, Di Chen, Guifeng Xu, Weichun Huang, Xing Wang
Infection by carbapenem-resistant Klebsiella pneumoniae (CR-KP) is a public health challenge worldwide, in particular among children, which was associated with high morbidity and mortality rates. There was limited data in pediatric populations, thus this study aimed to investigate molecular epidemiology and drug resistant mechanism of CR-KP strains from pediatric patients in Shanghai, China. A total of 41 clinical CR-KP isolates from sputum, urine, blood or drainage fluid were collected between July 2014 and May 2015 in Shanghai Children's Medical Center...
2018: PloS One
https://www.readbyqxmd.com/read/29556217/molecular-and-conventional-analysis-of-acute-diarrheal-isolates-identifies-epidemiological-trends-antibiotic-resistance-and-virulence-profiles-of-common-enteropathogens-in-shanghai
#20
Feng Yang, Yonggen Jiang, Lihua Yang, Juanxiu Qin, Mingquan Guo, Yuxia Lu, Hongyou Chen, Yuan Zhuang, Jinghao Zhang, Hong Zhang, Zhaoyun Dai, Min Li, Changqing Yang, Min Chen, Yanmei Zhang, Hu Zhao
Objective: To investigate prevalence of acute diarrhea in Shanghai and analyze virulence associated-genes and antibiotic resistance of major enteropathogens using combination of conventional and molecular epidemiology methods. Method: The 412 stool specimens were obtained by systematic sampling from diarrhea patients throughout entire year 2016. Bacterial and viral pathogens were identified and bacterial isolates were cultured and screened for antibiotic resistance profiles. Two most prevalent bacteria, Vibrio parahaemolyticus and Salmonella were further typed by multi-locus sequence typing (MLST) and analyzed for presence of virulence-associated genes...
2018: Frontiers in Microbiology
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