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New delhi metallo

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https://www.readbyqxmd.com/read/28916900/were-all-carbapenemases-created-equal-treatment-of-ndm-producing-extensively-drug-resistant-enterobacteriaceae-a-case-report-and-literature-review
#1
REVIEW
Vindana Chibabhai, Trusha Nana, Norma Bosman, Teena Thomas, Warren Lowman
PURPOSE: There is currently a paucity of published literature focused on the treatment of infections caused by NDM-producing organisms. METHODS: We describe a case of a bacteraemia caused by an extensively drug-resistant (XDR) New Delhi metallo-β-lactamase (NDM)-producing Serratia marcescens and review the treatment options for XDR NDM-producing Enterobacteriaceae. RESULTS: Infections caused by New Delhi beta-lactamase (NDM)-producing Enterobacteriaceae are becoming increasingly prevalent worldwide...
September 15, 2017: Infection
https://www.readbyqxmd.com/read/28910381/genetic-characterization-of-blandm-harboring-plasmids-in-carbapenem-resistant-escherichia-coli-from-myanmar
#2
Yo Sugawara, Yukihiro Akeda, Noriko Sakamoto, Dan Takeuchi, Daisuke Motooka, Shota Nakamura, Hideharu Hagiya, Norihisa Yamamoto, Isao Nishi, Hisao Yoshida, Kazuhisa Okada, Khwar Nyo Zin, Mya Mya Aye, Kazunori Tonomo, Shigeyuki Hamada
The bacterial enzyme New Delhi metallo-β-lactamase hydrolyzes almost all β-lactam antibiotics, including carbapenems, which are drugs of last resort for severe bacterial infections. The spread of carbapenem-resistant Enterobacteriaceae that carry the New Delhi metallo-β-lactamase gene, blaNDM, poses a serious threat to public health. In this study, we genetically characterized eight carbapenem-resistant Escherichia coli isolates from a tertiary care hospital in Yangon, Myanmar. The eight isolates belonged to five multilocus-sequence types and harbored multiple antimicrobial-resistance genes, resulting in resistance against nearly all of the antimicrobial agents tested, except colistin and fosfomycin...
2017: PloS One
https://www.readbyqxmd.com/read/28887202/hospital-sewage-water-a-reservoir-for-variants-of-new-delhi-metallo-%C3%AE-lactamase-blandm-and-esbl-producing-enterobacteriaceae
#3
Shadab Parvez, Asad U Khan
New Delhi metallo-β-lactamase (NDM)-producing Enterobacteriaceae has become a threat to public health. Hospital sewage is generally unexplored, having a potential for harbouring bacteria causing healthcare-associated infections. Hence, we initiated this study to monitor NDM-producing Enterobacteriaceae in hospital sewage water. We detected 32 isolates with blaNDM variants, 17 Escherichia coli, 8 Citrobacter freundii, 4 Shigella boydii, 2 Citrobacter braakii, and 1 Citrobacter farmeri in hospital sewage water, showing resistance to all antibiotics except colistin...
September 5, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28878746/inhibition-of-new-delhi-metallo-%C3%AE-lactamase-1-ndm-1-producing-escherichia-coli-ir-6-by-selected-plant-extracts-and-their-synergistic-actions-with-antibiotics
#4
Brinda Chandar, Sundar Poovitha, Kaliappan Ilango, Ramasamy MohanKumar, Madasamy Parani
Improper use of antibiotics has led to a great concern in the development of pathogenic microbial resistance. New Delhi metallo-β-lactamase 1 (NDM-1) producing bacteria are resistant to most of the β-lactam antibiotics, and so far, no new compounds have been clinically tested against these bacteria. In this study, ethanol extracts from the leaves of 240 medicinal plant species were screened for antibacterial activity against an NDM-1 Escherichia coli strain. The extracts that showed antibacterial activity were then tested for minimum inhibitory concentrations (MICs) and zones of inhibition...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28876082/co-production-of-ndm-1-and-oxa-232-by-st16-klebsiella-pneumoniae-italy-2016
#5
Manuela Avolio, Carla Vignaroli, Massimo Crapis, Alessandro Camporese
Carbapenem-resistant Klebsiella pneumoniae strains, New Delhi metallo-β-lactamase-1 producers, are still rare in Italy, being endemic in Southeast Asiatic region. In October 2016, a multidrug-resistant K. pneumoniae was isolated from blood and urine of an Italian long-hospitalized patient with urosepsis without travel history abroad. To the best of our knowledge, this is the first report of bacteremia caused by an ST16 K. pneuomoniae New Delhi metallo-β-lactamase-1 and OXA-232 co-producing carbapenemase, in Italy...
September 6, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28867789/multiple-antibiotic-resistant-extended-spectrum-%C3%AE-lactamase-esbl-producing-enterobacteria-in-fresh-seafood
#6
Asem Sanjit Singh, Manjusha Lekshmi, Sreepriya Prakasan, Binaya Bhusan Nayak, Sanath Kumar
Members of the family Enterobacteriaceae include several human pathogens that can be acquired through contaminated food and water. In this study, the incidence of extended spectrum β-lactamase (ESBL)-producing enterobacteria was investigated in fresh seafood sold in retail markets. The ESBL-positive phenotype was detected in 169 (78.60%) isolates, with Escherichia coli being the predominant species (53), followed by Klebsiella oxytoca (27), and K. pneumoniae (23). More than 90% of the isolates were resistant to third generation cephalosporins, cefotaxime, ceftazidime, and cefpodoxime...
August 30, 2017: Microorganisms
https://www.readbyqxmd.com/read/28859500/emergence-of-ndm-1-among-carbapenem-resistant-klebsiella-pneumoniae-in-iraqi-hospitals
#7
Nadheema Hammood Hussein
Carbapenems are the last drugs of choice apart from colistin against serious infections caused by Gram-negative bacteria. However, there are increasing number of reports indicating prevailing emergence of metallo-β-lactamase (MBL)-producing clinical isolates worldwide and among them New Delhi MBL (NDM) is the most prevalent one. This study reports NDM-1 for the first time among Klebsiella pneumoniae from hospitalized patients in Baghdad, Iraq. Fifty-five clinical isolates of K. pneumoniae resistant to carbapenem were investigated from burned wounds, sputum, and blood samples...
September 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28854628/genomic-epidemiology-of-ndm-1-encoding-plasmids-in-latin-american-clinical-isolates-reveals-insights-into-the-evolution-of-multidrug-resistance
#8
Ricaurte Alejandro Marquez-Ortiz, Leanne Haggerty, Narda Olarte, Carolina Duarte, Ulises Garza-Ramos, Jesus Silva-Sanchez, Betsy E Castro, Eby M Sim, Mauricio Beltran, María V Moncada, Alberto Valderrama, Jaime E Castellanos, Ian G Charles, Natasha Vanegas, Javier Escobar-Perez, Nicola K Petty
Bacteria that produce the broad-spectrum Carbapenem antibiotic New Delhi Metallo-β-lactamase (NDM) place a burden on health care systems worldwide, due to the limited treatment options for infections caused by them and the rapid global spread of this antibiotic resistance mechanism. Although it is believed that the associated resistance gene blaNDM-1 originated in Acinetobacter spp., the role of Enterobacteriaceae in its dissemination remains unclear. In this study, we used whole genome sequencing to investigate the dissemination dynamics of blaNDM-1-positive plasmids in a set of 21 clinical NDM-1-positive isolates from Colombia and Mexico (Providencia rettgeri, Klebsiella pneumoniae, and Acinetobacter baumannii) as well as six representative NDM-1-positive Escherichia coli transconjugants...
June 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28839253/complete-sequences-of-two-novel-bla-ndm-1-harbouring-plasmids-from-two-acinetobacter-towneri-isolates-in-china-associated-with-the-acquisition-of-tn125
#9
Dayang Zou, Yong Huang, Wei Liu, Zhan Yang, Derong Dong, Simo Huang, Xiaoming He, Da Ao, Ningwei Liu, Shengshu Wang, Yong Wang, Yigang Tong, Jing Yuan, Liuyu Huang
Two novel New Delhi metallo-β-lactamase-1 (NDM-1)-positive plasmids containing a complete composite transposon, Tn125, from two respective Acinetobacter towneri isolates were characterized. Plasmid pNDM-GJ01 (30,293 bp) isolated from A. towneri G165 did not show homology to any known plasmid structure, except for the transposon Tn125 containing bla NDM-1. A novel repB gene and two XRE-type transcriptional regulators were found in pNDM-GJ01. Plasmid pNDM-GJ02 (62,011 bp) isolated from A. towneri G295 showed the highest homology to pBJAB0715 (41% coverage, 99% nucleotide identity)...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28830556/transmission-and-characterization-of-bla-ndm-1-in-enterobacter-cloacae-at-a-teaching-hospital-in-yunnan-china
#10
Na Du, Shumin Liu, Min Niu, Yong Duan, Shuangmeng Zhang, Jing Yao, Jian Mao, Ran Chen, Yan Du
BACKGROUND: In recent years, New Delhi metallo-beta-lactamases 1 (bla NDM-1) has been reported with increasing frequency and become prevalent. The present study was undertaken to investigate the epidemiological dissemination of the bla NDM-1 gene in Enterobacter cloacae isolates at a teaching hospital in Yunnan, China. METHODS: Antimicrobial susceptibility testing was performed using VITEK 2 system and E test gradient strips. The presence of integrons and insertion sequence common region 1 were examined by PCR and sequencing...
August 22, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28820386/cost-of-nosocomial-outbreak-caused-by-ndm-1-containing-klebsiella-pneumoniae-in-the-netherlands-october-2015-january-2016
#11
Madelief Mollers, Suzanne P Lutgens, Annelot F Schoffelen, Peter M Schneeberger, Anita W M Suijkerbuijk
During October-December 2015, 29 patients in a hospital in the Netherlands acquired nosocomial infection with a multidrug-resistant, New Delhi-metallo-β-lactamase-positive Klebsiella pneumoniae strain. Extensive infection control measures were needed to stop this outbreak. The estimated economic impact of the outbreak was $804,263; highest costs were associated with hospital bed closures.
September 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28820383/carbapenemase-producing-enterobacteriaceae-and-nonfermentative-bacteria-the-philippines-2013-2016
#12
John Mark Velasco, Maria Theresa Valderama, Trent Peacock, Nirdnoy Warawadee, Kathyleen Nogrado, Fatima Claire Navarro, Domingo Chua, Srijan Apichai, Ruekit Sirigade, Louis R Macareo, Brett Swierczewski
During 2013-2016, we isolated blaNDM- and blaVIM-harboring Enterobacteriaceae and nonfermentative bacteria from patients in the Philippines. Of 130 carbapenem-resistant isolates tested, 45 were Carba NP-positive; 43 harbored blaNDM, and 2 harbored blaVIM. Multidrug-resistant microbial pathogen surveillance and antimicrobial drug stewardship are needed to prevent further spread of New Delhi metallo-β-lactamase variants.
September 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28809565/dipicolinic-acid-derivatives-as-inhibitors-of-new-delhi-metallo-%C3%AE-lactamase-1
#13
Allie Y Chen, Pei W Thomas, Alesha C Stewart, Alexander Bergstrom, Zishuo Cheng, Callie Miller, Christopher R Bethel, Steven H Marshall, Cy V Credille, Christopher L Riley, Richard C Page, Robert A Bonomo, Michael W Crowder, David L Tierney, Walter Fast, Seth M Cohen
The efficacy of β-lactam antibiotics is threatened by the emergence and global spread of metallo-β-lactamase (MBL) mediated resistance, specifically New Delhi metallo-β-lactamase-1 (NDM-1). By utilization of fragment-based drug discovery (FBDD), a new class of inhibitors for NDM-1 and two related β-lactamases, IMP-1 and VIM-2, was identified. On the basis of 2,6-dipicolinic acid (DPA), several libraries were synthesized for structure-activity relationship (SAR) analysis. Inhibitor 36 (IC50 = 80 nM) was identified to be highly selective for MBLs when compared to other Zn(II) metalloenzymes...
September 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28808891/nmr-backbone-resonance-assignment-of-new-delhi-metallo-beta-lactamase
#14
Chendie Yao, Qiong Wu, Guohua Xu, Conggang Li
The emerging of the New Delhi metallo-beta-lactamase (NDM-1) has become one of the greatest threats to the clinical treatment. Although the structure of NDM-1 has been determined by X-ray crystallography, the molecular mechanism and process of catalysis reaction remain elusive. NMR spectroscopy plays a unique role in the characterization of conformational dynamics. Here we report the backbone (1)H, (15)N and (13)C chemical shift assignments of NDM-1 by heteronuclear multidimensional NMR spectroscopy as well as its secondary structure in solution as predicted by TALOS+...
August 14, 2017: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/28807096/a-five-year-surveillance-of-carbapenemase-producing-klebsiella-pneumoniae-in-a-pediatric-hospital-in-china-reveals-increased-predominance-of-ndm-1
#15
Fang Dong, Jie Lu, Yan Wang, Jin Shi, Jing Hui Zhen, Ping Chu, Yang Zhen, Shu Jing Han, Yong Li Guo, Wen Qi Song
OBJECTIVE: To characterize carbapenem (CPM)-non-susceptible Klebsiella pneumoniae (K. pneumoniae) and carbape-nemase produced by these strains isolated from Beijing Children's Hospital based on a five-year surveillance. METHODS: The Minimal Inhibition Concentration values for 15 antibiotics were assessed using the Phonix100 compact system. PCR amplification and DNA sequencing were used to detect genes encoding carbapenemases. WHONET 5.6 was finally used for resistance analysis...
August 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28789913/molecular-epidemiology-of-klebsiella-pneumoniae-invasive-infections-over-a-decade-at-kilifi-county-hospital-in-kenya
#16
Sonal P Henson, Christine J Boinett, Matthew J Ellington, Ngure Kagia, Salim Mwarumba, Sammy Nyongesa, Neema Mturi, Samuel Kariuki, J Anthony G Scott, Nicholas R Thomson, Susan C Morpeth
Multidrug resistant (MDR) Klebsiella pneumoniae is a common cause of nosocomial infections worldwide. Recent years have seen an explosion of resistance to extended-spectrum β-lactamases (ESBLs) and emergence of carbapenem resistance. Here, we examine 198 invasive K. pneumoniae isolates collected from over a decade in Kilifi County Hospital (KCH) in Kenya. We observe a significant increase in MDR K. pneumoniae isolates, particularly to third generation cephalosporins conferred by ESBLs. Using whole-genome sequences, we describe the population structure and the distribution of antimicrobial resistance genes within it...
July 22, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28784300/synthesis-and-biological-evaluation-of-aspergillomarasmine-a-derivatives-as-novel-ndm-1-inhibitor-to-overcome-antibiotics-resistance
#17
Jian Zhang, Sanshan Wang, Qi Wei, Qianqian Guo, Yingjie Bai, Shaoqiang Yang, Fuhang Song, Lixin Zhang, Xiaoguang Lei
The β-lactam antibiotic resistance of Gram-negative bacteria has shown to be a critical global health problem. One of the primary reasons for the drug resistance is the existence of β-lactamases especially metallo-β-lactamases such as New Delhi metallo-β-lactamase (NDM-1) and Verona Integron-encoded metallo-β-lactamase (VIM-2). The fungal natural product Aspergillomarasmine A (AMA) has proven to be a promising inhibitor of NDM-1 and VIM-2 both in vitro and in vivo. Seven new analogues of AMA were synthesized by utilizing different strategies...
July 14, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28776045/whole-genome-sequencing-of-human-clinical-klebsiella-pneumoniae-isolates-reveals-misidentification-and-misunderstandings-of-klebsiella-pneumoniae-klebsiella-variicola-and-klebsiella-quasipneumoniae
#18
S Wesley Long, Sarah E Linson, Matthew Ojeda Saavedra, Concepcion Cantu, James J Davis, Thomas Brettin, Randall J Olsen
Klebsiella pneumoniae is a major threat to public health, causing significant morbidity and mortality worldwide. The emergence of highly drug-resistant strains is particularly concerning. There has been a recognition and division of Klebsiella pneumoniae into three distinct phylogenetic groups: Klebsiella pneumoniae, Klebsiella variicola, and Klebsiella quasipneumoniae. K. variicola and K. quasipneumoniae have often been described as opportunistic pathogens that have less virulence in humans than K. pneumoniae does...
July 2017: MSphere
https://www.readbyqxmd.com/read/28743810/polymyxin-combinations-combat-escherichia-coli-harboring-mcr-1-and-blandm-5-preparation-for-a-postantibiotic-era
#19
Zackery P Bulman, Liang Chen, Thomas J Walsh, Michael J Satlin, Yuli Qian, Jürgen B Bulitta, Charles A Peloquin, Patricia N Holden, Roger L Nation, Jian Li, Barry N Kreiswirth, Brian T Tsuji
The rapid increase of carbapenem resistance in Gram-negative bacteria has resurrected the importance of the polymyxin antibiotics. The recent discovery of plasmid-mediated polymyxin resistance (mcr-1) in carbapenem-resistant Enterobacteriaceae serves as an important indicator that the golden era of antibiotics is under serious threat. We assessed the bacterial killing of 15 different FDA-approved antibiotics alone and in combination with polymyxin B in time-killing experiments against Escherichia coli MCR1_NJ, the first reported isolate in the United States to coharbor mcr-1 and a New Delhi metallo-β-lactamase gene (blaNDM-5)...
July 25, 2017: MBio
https://www.readbyqxmd.com/read/28719354/thymol-and-carvacrol-strongly-inhibit-biofilm-formation-and-growth-of-carbapenemase-producing-gram-negative-bacilli
#20
P Raei, T Pourlak, M Y Memar, N Alizadeh, M Aghamali, E Zeinalzadeh, M Asgharzadeh, H S Kafil
Discovery of novel drugs with new mechanisms of action and without cross-reaction with current therapeutic agents is crucial in the management of infections caused by multi-drug resistant (MDR) bacteria. The aim of the present study was to investigate effects of carvacrol and thymol on biofilm formation and antimicrobial activity against different carbapenemase-producing Gram negative bacilli. The antimicrobial and antibiofilm effect of thymol and carvacrol was investigated against strains harboring different genes related to carbapenemase resistance...
May 20, 2017: Cellular and Molecular Biology
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