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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
#1
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
#2
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
#3
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...
April 13, 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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/29527517/biofilm-formation-in-klebsiella-pneumoniae-bacteremia-strains-was-found-to-be-associated-with-cc23-and-the-presence-of-wcag
#8
Jin-Xin Zheng, Zhi-Wei Lin, Chen Chen, Zhong Chen, Fo-Jun Lin, Yang Wu, Si-Yu Yang, Xiang Sun, Wei-Ming Yao, Duo-Yun Li, Zhi-Jian Yu, Jia-Lin Jin, Di Qu, Qi-Wen Deng
Klebsiella pneumoniae bacteremia biofilm traits and distribution characteristics have not been clarified. This study aimed to determine the prevalence and characteristics of K. pneumoniae bacteremia biofilm formation (BF) and to explore the virulence factors associated with K. pneumoniae BF. A total of 250 K. pneumoniae bacteremia isolates were collected from patients in Shenzhen and Shanghai, China. Virulence genes in their genomes were detected by PCR. The isolates were subjected to multilocus sequence typing (MLST) and clonal complex (CC) classification based on housekeeping genes...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29518198/molecular-epidemiology-of-ndm-1-and-oxa-48-producing-klebsiella-pneumoniae-in-an-iranian-hospital-clonal-dissemination-of-st11-and-st893
#9
Hamid Solgi, Farzad Badmasti, Christian G Giske, Shadi Aghamohammad, Fereshteh Shahcheraghi
Objectives: Despite the fact that the blaOXA-48 and blaNDM-1 genes have successfully disseminated among Klebsiella pneumoniae isolates worldwide, outbreaks remain unidentified in Iran. Here we examined the molecular epidemiology of 96 carbapenem-resistant K. pneumoniae recovered from an Iranian hospital. Methods: A total of 96 non-replicate carbapenem-resistant K. pneumoniae were recovered from clinical specimens in a university hospital. Detection of ESBLs and carbapenemases produced by studied strains was performed using PCR and DNA sequencing...
March 6, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29505557/genotypic-analysis-of-clinical-and-environmental-cryptococcus-neoformans-isolates-from-brazil-reveals-the-presence-of-vnb-isolates-and-a-correlation-with-biological-factors
#10
Leonardo Euripedes Andrade-Silva, Kennio Ferreira-Paim, Thatiana Bragine Ferreira, Anderson Vilas-Boas, Delio José Mora, Verônica Morais Manzato, Fernanda Machado Fonseca, Kelli Buosi, Juliana Andrade-Silva, Bruno da Silva Prudente, Natalia Evelyn Araujo, Helioswilton Sales-Campos, Marcus Vinicius da Silva, Virmondes Rodrigues Júnior, Wieland Meyer, Mario Léon Silva-Vergara
Cryptococcal infections are mainly caused by members of the Cryptococcus neoformans species complex (molecular types VNI, VNII, VNB, VNIV and the AD hybrid VNIII). PCR of the mating type loci and MLST typing using the ISHAM-MLST consensus scheme were used to evaluate the genetic relationship of 102 (63 clinical and 39 environmental) C. neoformans isolates from Uberaba, Brazil and to correlate the obtained genotypes with clinical, antifungal susceptibility and virulence factor data. All isolates were mating type alpha...
2018: PloS One
https://www.readbyqxmd.com/read/29478336/carbapenemase-producing-enterobacteriaceae-in-south-korea-a-report-from-the-national-laboratory-surveillance-system
#11
Eun-Jeong Yoon, Ji Woo Yang, Jung Ok Kim, Hyukmin Lee, Kwang Jun Lee, Seok Hoon Jeong
AIM: To assess the epidemiology of carbapenemase-producing Enterobacteriaceae (CPE) in South Korea. MATERIALS & METHODS: From 2011 to 2015, 2487 carbapenem-nonsusceptible Enterobacteriaceae were collected through the Korean National Laboratory Surveillance System. Disk-diffusion for antimicrobial susceptibility, PCR/sequencing to detect carbapenemase genes and multilocus sequence typing for molecular epidemiology were carried out. RESULTS: The number of carbapenem-nonsusceptible Enterobacteriaceae was increasing approximately 1...
February 26, 2018: Future Microbiology
https://www.readbyqxmd.com/read/29471690/genetic-support-of-carbapenemases-in-double-carbapenemase-producer-klebsiella-pneumoniae-isolated-in-the-arabian-peninsula
#12
Amna E Al-Baloushi, Tibor Pál, Akela Ghazawi, Agnes Sonnevend
Enterobacteriaceae co-producing NDM- and OXA-48-type carbapenemases were encountered in higher frequency in the United Arab Emirates (UAE) than in the neighboring countries in our earlier study. The aim of this investigation was to characterize the seven double carbapenemase producer Klebsiella pneumoniae found in the region to assess factors contributing to their emergence. Three K. pneumoniae ST14 isolated in the UAE harboring blaNDM-1 on IncHI1b and blaOXA-232 on IncColE plasmids were clonally related. Furthermore, two K...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29459053/virulence-genes-capsular-and-plasmid-types-of-multidrug-resistant-ctx-m-2-8-15-and-kpc-2-producing-klebsiella-pneumoniae-isolates-from-four-major-hospitals-in-brazil
#13
Leonardo Neves Andrade, Ângela Novais, Lenita Maria Marcato Stegani, Joseane Cristina Ferreira, Carla Rodrigues, Ana Lucia Costa Darini, Luisa Peixe
We performed a single-month snapshot study of the population diversity of multidrug resistant (MDR) Klebsiella pneumoniae isolates producing carbapenemases and/or extended-spectrum β-lactamases from four major hospitals in Brazil. Isolates produced diverse ESBL (CTX-M-2, -8, -15, SHV-2), KPC-2 or both (CTX-M-2 and KPC-2), linked to specific genetic backgrounds and plasmids from a few families (IncR, IncFIIk, IncL/M) that were shared among clonal lineages within and between hospitals. A high clonal diversity was identified, among isolates from the same ST (ST11, ST15, ST101 or ST340)...
January 12, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29458851/combination-of-multilocus-sequence-typing-and-pulsed-field-gel-electrophoresis-reveals-an-association-of-molecular-clonality-with-the-emergence-of-extensive-drug-resistance-xdr-in-salmonella
#14
Yongzhong Cao, Yongxiu Shen, Lingling Cheng, Xiaorong Zhang, Chao Wang, Yan Wang, Xiaohui Zhou, Guoxiang Chao, Yantao Wu
Salmonellae is one of the most important foodborne pathogens and becomes resistant to multiple antibiotics, which represents a significant challenge to food industry and public health. However, a molecular signature that can be used to distinguish antimicrobial resistance profile, particularly multi-drug resistance or extensive-drug resistance (XDR). In the current study, 168 isolates from the chicken and pork production chains and ill chickens were characterized by serotyping, antimicrobial susceptibility test, multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE)...
March 2018: Microbiological Research
https://www.readbyqxmd.com/read/29458443/epidemiology-and-control-measures-of-an-oxa-48-producing-enterobacteriaceae-hospital-wide-oligoclonal-outbreak
#15
V Pérez-Blanco, L Redondo-Bravo, G Ruíz-Carrascoso, J R Paño-Pardo, R Gómez-Gil, A Robustillo-Rodela, J García-Rodríguez, J Mingorance, R Herruzo
The main objective of our study was to describe the epidemiological and microbiological features of an oligoclonal hospital-wide outbreak caused by OXA-48-producing Enterobacteriaceae (OXA-48-PE). OXA-48 is a carbapenemase belonging to Ambler class D beta-lactamases, identified frequently in the Mediterranean and Southern European countries, and associated with several Enterobacteriaceae species. An outbreak of OXA-48-PE with a complex epidemic pattern was detected in January 2011. Initial control measures included contact precautions and the reinforcement of infection control practices, but despite all efforts made, the epidemiological situation hardly changed and new measures were implemented during 2013...
February 20, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29452198/microbial-infection-pattern-pathogenic-features-and-resistance-mechanism-of-carbapenem-resistant-gram-negative-bacilli-during-long-term-hospitalization
#16
Shuxian Wen, Donghua Feng, Zerong Lu, Junyan Liu, Brian M Peters, Hailing Tang, Danhong Su, Yong-Ping Lin, Ling Yang, Zhenbo Xu, Mark E Shirtliff, Dingqiang Chen
BACKGROUND: Carbapenem-resistant Gram-negative bacilli (GNB) have become an important cause of nosocomial infections of hospitalized patients. METHODS: To investigate the microbial infection patterns and molecular epidemiology characteristics of the carbapenem-resistant GNB isolates from a long-term hospitalized patient, antimicrobial susceptibility testing, phenotypic screening test for carbapenemase production, PCR screening and DNA sequencing of carbapenemase genes, repetitive extragenic palindromic sequence-based PCR (REP-PCR), multilocus sequencing typing (MLST) and genetic environment analysis were performed...
February 13, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29431605/multifactorial-chromosomal-variants-regulate-polymyxin-resistance-in-extensively-drug-resistant-klebsiella-pneumoniae
#17
Miranda E Pitt, Alysha G Elliott, Minh Duc Cao, Devika Ganesamoorthy, Ilias Karaiskos, Helen Giamarellou, Cely S Abboud, Mark A T Blaskovich, Matthew A Cooper, Lachlan J M Coin
Extensively drug-resistant Klebsiella pneumoniae (XDR-KP) infections cause high mortality and are disseminating globally. Identifying the genetic basis underpinning resistance allows for rapid diagnosis and treatment. XDR isolates sourced from Greece and Brazil, including 19 polymyxin-resistant and five polymyxin-susceptible strains, were subjected to whole genome sequencing. Seventeen of the 19 polymyxin-resistant isolates harboured variations upstream or within mgrB. The most common mutation identified was an insertion at nucleotide position 75 in mgrB via an ISKpn26-like element in the ST258 lineage and ISKpn13 in one ST11 isolate...
February 12, 2018: Microbial Genomics
https://www.readbyqxmd.com/read/29430190/-salmonella-enterica-serovars-typhimurium-and-enteritidis-causing-mixed-infections-in-febrile-children-in-mozambique
#18
Vanesa García, Inácio Mandomando, Joaquim Ruiz, Silvia Herrera-León, Pedro L Alonso, M Rosario Rodicio
Background and purpose: Invasive nontyphoidal salmonellosis, mostly caused by serovars Typhimurium and Enteritidis of Salmonella enterica , has emerged as a major public health problem in sub-Saharan Africa. The aim of this study was the clinical and microbiological characterization of nontyphoidal salmonellosis episodes affecting febrile children in Mozambique. Patients and methods: The clinical records of the patients were evaluated, and S. enterica isolates were characterized with regard to serovar, phage type, antimicrobial resistance (phenotype/responsible genes), plasmid content, pulsed-field gel electrophoresis, and multilocus sequence typing...
2018: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29424684/genome-analysis-of-clinical-multilocus-sequence-type-11-klebsiella-pneumoniae-from-china
#19
Ning Dong, Rong Zhang, Lizhang Liu, Ruichao Li, Dachuan Lin, Edward Wai-Chi Chan, Sheng Chen
The increasing prevalence of KPC-producing Klebsiella pneumoniae strains in clinical settings has been largely attributed to dissemination of organisms of specific multilocus sequence types, such as ST258 and ST11. Compared with the ST258 clone, which is prevalent in North America and Europe, ST11 is common in China but information regarding its genetic features remains scarce. In this study, we performed detailed genetic characterization of ST11 K. pneumoniae strains by analyzing whole-genome sequences of 58 clinical strains collected from diverse geographic locations in China...
February 8, 2018: Microbial Genomics
https://www.readbyqxmd.com/read/29422888/klebsiella-pneumoniae-carbapenemase-producers-in-south-korea-between-2013-and-2015
#20
Eun-Jeong Yoon, Jung Ok Kim, Dokyun Kim, Hyukmin Lee, Ji Woo Yang, Kwang Jun Lee, Seok Hoon Jeong
Between 2014 and 2015, the Klebsiella pneumoniae carbapenemase (KPC) was becoming endemic in South Korea. To assess this period of transition, we analyzed KPC producers in terms of molecular epidemiology. A total of 362 KPC-producing Enterobacteriaceae strains, including one from 2013, 13 from 2014, and 348 from 2015, were actively collected from 60 hospitals throughout the peninsula. Subtypes of KPC were determined by PCR and direct sequencing, and isotypes of Tn4401 (the transposon flanking the blaKPC gene) were specified by PCR using isotype-specific primers and direct sequencing...
2018: Frontiers in Microbiology
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