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New Delhi Metallo-beta-lactamase

Gaurav Kumar, Bagre Issa, Debasish Kar, Sarmistha Biswal, Anindya S Ghosh
New Delhi Metallo beta-lactamase (NDM) is of significant public health concern due to its enormous potential to hydrolyse all major beta-lactams including carbapenems. Amino acid substitutions outside the active site reportedly affect NDM beta-lactamase activities. Here, the effect of amino acid substitutions in the possible omega-like loop region of NDM-5 has been elucidated. Overall, three substitution mutations near active site of NDM-5 were done, namely, E152A, S191A, and D223A and subsequently, the change in antimicrobial resistance was monitored upon expressing each mutant in a suitable host...
January 12, 2017: FEMS Microbiology Letters
Lei Chen, Randall Todd, Julia Kiehlbauch, Maroya Walters, Alexander Kallen
No abstract text is available yet for this article.
January 13, 2017: MMWR. Morbidity and Mortality Weekly Report
(no author information available yet)
[This corrects the article DOI: 10.4103/0255-0857.188314.].
October 2016: Indian Journal of Medical Microbiology
D N Tran, H H Tran, M Matsui, M Suzuki, S Suzuki, K Shibayama, T D Pham, T T Van Phuong, D A Dang, H S Trinh, C T Loan, L T V Nga, H R van Doorn, H F L Wertheim
Acinetobacter baumannii is an important cause of multidrug-resistant hospital acquired infections in the world. Here, we investigate the presence of NDM-1 and other carbapenemases among carbapenem-resistant A. baumannii isolated between August 2010 and December 2014 from three large hospitals in Hanoi, Vietnam. We identified 23/582 isolates (4 %) (11 from hospital A, five from hospital B, and seven from hospital C) that were NDM-1 positive, and among them 18 carried additional carbapenemase genes, including seven isolates carrying NDM-1, IMP-1, and OXA-58 with high MICs for carbapenems...
October 6, 2016: European Journal of Clinical Microbiology & Infectious Diseases
Amit Ranjan, Sabiha Shaik, Agnismita Mondal, Nishant Nandanwar, Arif Hussain, Torsten Semmler, Narender Kumar, Sumeet K Tiwari, Savita Jadhav, Lothar H Wieler, Niyaz Ahmed
The global dissemination and increasing incidence of carbapenem-resistant, Gram-negative organisms have resulted in acute public health concerns. Here, we present a retrospective multicenter study on molecular characterization of metallo-β-lactamase (MBL)-producing clinical Escherichia coli isolates recovered from extraintestinal infections in two hospitals in Pune, India. We screened a large sample size of 510 E. coli isolates for MBL production wherein we profiled their molecular determinants, antimicrobial resistance phenotypes, functional virulence properties, genomic features, and transmission dynamics...
November 2016: Antimicrobial Agents and Chemotherapy
Yong Shen, Wei-Qiang Xiao, Jiao-Mei Gong, Jun Pan, Qing-Xia Xu
BACKGROUND: The increase in blaNDM -1 in Enterobacteriaceae has become a major concern worldwide. In previous study, we investigated clonal dissemination and mechanisms of resistance to carbapenem in China. METHODS: We carried out retrospective surveillance for blaNDM -1 among carbapenem-resistant enterobacter strains, which were isolated from patients at our hospital by bacterial strains selection, antimicrobial susceptibility testing, species identification, and molecular detection of resistance gene...
August 27, 2016: Journal of Clinical Laboratory Analysis
Chih-Cheng Lai, Chi-Chung Chen, Hui-Ling Huang, Yin-Ching Chuang, Hung-Jen Tang
This study assessed the in vitro antibacterial activity of combinations of amikacin and doxycycline or tigecycline against multidrug-resistant E. coli isolates. Twenty-four different pulsotypes, including 10 extended-spectrum β-lactamase (ESBL)-, 10 carbapenem-resistant, 2 New Delhi Metallo-beta-lactamase (NDM)- and 2 Klebsiella pneumoniae carbapenemase (KPC)-E. coli isolates were collected. All 24 isolates were susceptible to amikacin and tigecycline. Only 30% of ESBL and 50% of carbapenem-resistant E. coli were susceptible to doxycycline...
August 18, 2016: Scientific Reports
Erum Khan, Seema Irfan, Binish Arif Sultan, Amna Nasir, Rumina Hasan
OBJECTIVE: To find out frequency of isolation of carbapenem-resistant enterobacteriaceae and the predominantly responsible metallo-beta-lactamasegene in a hospital setting. METHODS: The descriptive, cross-sectional study was conducted from May 2009 to June 2012 at the Aga Khan University Hospital, Karachi, and comprised non-duplicate clinical carbapenem-resistant enterobacteriaceae isolates obtained from different collection units across Pakistan. Kirby-Bauer disk diffusion screening of carbapenem-resistant enterobacteriaceae was confirmed by minimum inhibitory concentration using E-test...
August 2016: JPMA. the Journal of the Pakistan Medical Association
A Manoharan, G S Barla, R Peter, M Sugumar, D Mathai
In this study, we evaluated the coexistence of extended-spectrum beta-lactamases (ESBL), AmpC and New Delhi metallo-beta-lactamase-1 (NDM-1) genes among carbapenem-resistant Enterobacteriaceae (CRE) recovered prospectively from patients at multiple sites. The study included 285 CRE strains from 2782 Gram-negative Bacilli collected from multiple centres during 2007-2010, of which 87 were characterised. Standard and reference laboratory methods were used for resistance determination. Detection of blaNDM-1 , blaAmpC , blaTEM , blaSHV and blaCTX-M was done by polymerase chain reaction...
July 2016: Indian Journal of Medical Microbiology
P B Mal, J Farooqi, S Irfan, M A Hughes, E Khan
We analysed susceptibility of multidrug-resistant organisms (MDROs) including New Delhi metallo-beta-lactamase-1 positive Enterobacteriaceae to chlorhexidine and compared results to their susceptible counterparts. Susceptibilities of chlorhexidine digluconate in a standard (CHX-S) preparation and two commercial disinfectants containing different CHX concentrations (2% w/v and 4% w/w) were performed. MDROs had narrower range of higher CHX-S minimum inhibitory concentrations (MICs) as compared to pan-sensitive organisms...
July 2016: Indian Journal of Medical Microbiology
G K Subramanian, P G Soundari, V Ramanathan, P Krishnan
PURPOSE: blaNDM genes are MBL genes that confer resistance to carbapenems. Globally, they are associated with diverse clones and plasmids. In this study, we characterised three isolates of Klebsiella pneumoniae-harbouring blaNDM1 from patients undergoing chronic haemodialysis and renal transplantation. MATERIALS AND METHODS: 3 blaNDM1 -producing K. pneumoniae were isolated from end-stage renal disease patients undergoing haemodialysis and renal transplantation from a nephrology unit...
July 2016: Indian Journal of Medical Microbiology
P Wilkowski, M Ciszek, K Dobrzaniecka, J Sańko-Resmer, A Łabuś, K Grygiel, T Grochowiecki, G Młynarczyk, L Pączek
BACKGROUND: Klebsiella pneumoniae New Delhi metallo-beta-lactamase-1 (NDM-1) strains have recently become a new threat in kidney transplant recipients due to the strains' resistance to almost all antibiotics, including carbapenems. METHODS: We present a case series of 3 patients with urinary tract infections (UTIs) caused by multiresistant K pneumoniae NDM-1 strains who were treated with the same protocol. Genotyping sequencing with pulsed-field gel electrophoresis was performed in all cases...
June 2016: Transplantation Proceedings
Wei Xin Khong, Eryu Xia, Kalisvar Marimuthu, Wenting Xu, Yik-Ying Teo, Eng Lee Tan, Shiyong Neo, Prabha Unny Krishnan, Brenda S P Ang, David C B Lye, Angela L P Chow, Rick Twee-Hee Ong, Oon Tek Ng
BACKGROUND: New Delhi metallo-β-lactamase (bla NDM), a plasmid-borne carbapenemase gene associated with significant mortality and severely limited treatment options, is of global public health concern as it is found in extremely diverse Gram-negative bacterial strains. This study thus aims to genetically characterize local and global spread of bla NDM. METHODS: To investigate local transmission patterns in the context of a single hospital, whole genome sequencing data of the first 11 bla NDM-positive bacteria isolated in a local hospital were analyzed to: (1) identify and compare bla NDM-positive plasmids; and (2) study the phylogenetic relationship of the bacteria chromosomes...
2016: BMC Genomics
Fabiana Schuelter-Trevisol, Graciane Jacinta Schmitt, Jane Martins de Araújo, Liliane Braga de Souza, Juliana Gomes Nazário, Raquel Landuchi Januário, Rogério Sobroza de Mello, Daisson José Trevisol
New Delhi metallo-beta-lactamase-1 (NDM-1) is a bacterial enzyme that renders the bacteria resistant to a variety of beta-lactam antibiotics. A 20-year-old man was hospitalized several times for surgical treatment and complications caused by a right-sided vestibular schwannoma. Although the patient acquired several multidrug-resistant infections, this study focuses on the NDM-1-producing Acinetobacter spp. infection. As it was resistant to all antimicrobials tested, the medical team developed a 20-day regimen of 750mg/day metronidazole, 2,000,000IU/day polymyxin B, and 100mg/day tigecycline...
February 2016: Revista da Sociedade Brasileira de Medicina Tropical
David van Duin, Robert A Bonomo
Ceftolozane/tazobactam and ceftazidime/avibactam are 2 novel β-lactam/β-lactamase combination antibiotics. The antimicrobial spectrum of activity of these antibiotics includes multidrug-resistant (MDR) gram-negative bacteria (GNB), including Pseudomonas aeruginosa. Ceftazidime/avibactam is also active against carbapenem-resistant Enterobacteriaceae that produce Klebsiella pneumoniae carbapenemases. However, avibactam does not inactivate metallo-β-lactamases such as New Delhi metallo-β-lactamases. Both ceftolozane/tazobactam and ceftazidime/avibactam are only available as intravenous formulations and are dosed 3 times daily in patients with normal renal function...
July 15, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Summaiya Mulla, Jaykaran Charan, Sangita Rajdev
BACKGROUND: Some studies published in recent time revealed that many bacteria from Enterobacteriaceae group are multi-antibiotic-resistant because of the production enzymes carbapenemase particularly New Delhi metallo-beta-lactamase encoded by gene called blaNDM-1. Looking at public health importance of this issue there is a need for studies at other centers to confirm or refute published findings. OBJECTIVES: This study was designed with the aim of exploring antibiotic resistance in Enterobacteriaceae group of bacteria and also to explore gene and enzyme responsible for it...
January 2016: International Journal of Applied and Basic Medical Research
Camille-Ann Thoms-Rodriguez, Tony Mazzulli, Nicole Christian, Barbara M Willey, David A Boyd, Laura F Mataseje, Michael R Mulvey, Celia D C Christie, Alison M Nicholson
INTRODUCTION: The global dissemination of the New Delhi metallo-beta-lactamase (NDM) gene among certain strains of bacteria has serious implications since the infections caused by such organisms pose a therapeutic challenge. Although the NDM gene has been detected in various parts of the world, this is the first report of its detection in the English-speaking Caribbean. The NDM producing Klebsiella pneumoniae was isolated from an Indian patient who had recently relocated to Jamaica. METHODOLOGY: Identification and susceptibility testing of the K...
February 28, 2016: Journal of Infection in Developing Countries
Praewdow Preechachuawong, Wichai Santimaleeworagun, Tossawan Jitwasinkul, Wandee Samret
The purpose of this study was to detect carbapenemase genes in clinical isolates of carbapenem-resistant Enterobacteriaceae (CRE) obtained from patients admitted to Hua-Hin Hospital, Prachuab Khiri Khan Province, Thailand between January and December 2014. Screening of CRE was initially determined using disk diffusion method, and subsequently using modified Hodge test (MHT). Multiplex PCR was employed to amplify carbapenemase genes, blaIMP, blaOXA-48, blaNDM blaKPC, and blaVIM. Of the 624 clinical isolates, seven CRE isolates were identified by the disk diffusion method, but were negative for MHT...
November 2015: Southeast Asian Journal of Tropical Medicine and Public Health
Oguz Karabay, Mustafa Altindis, Mehmet Koroglu, Onur Karatuna, Özlem Akkaya Aydemir, Ali Fuat Erdem
BACKGROUND: Recently, new carbapenemases in Enterobacteriaceae strains and non-fermentative gram-negative bacilli have been reported. The New Delhi metallo-β-lactamase-1 (NDM-1) is a major problem around the world. The purpose of this article is to address the NDM-1 Klebsiella pneumoniae epidemic detected in eight cases in our hospital. METHODS: Bacteria identified in this epidemic were from patients already admitted to the intensive care unit of the Sakarya University Training and Research Hospital during efforts toward establishment of infection surveillance and control program...
February 9, 2016: Annals of Clinical Microbiology and Antimicrobials
R Azumah, J Dutta, A M Somboro, M Ramtahal, L Chonco, R Parboosing, L A Bester, H G Kruger, T Naicker, S Y Essack, T Govender
AIMS: This study aimed at investigating the use of metal chelators as potential metallo-β-lactamase inhibitors (MBL). METHODS AND RESULTS: The minimum inhibitory concentration (MIC) of meropenem was ascertained alone and in combination with various concentrations of macrocyclic (1,4,7- triazacyclononane-1-glutaric acid-4,7-diacetic acid = NODAGA) peptide derivatives and acyclic (N,N,N',N'-Tetrakis(2-pyridylmethyl)ethylenediamine = TPEN and di-(2-picolyl)amine = DPA) metal chelators using the broth microdilution method...
April 2016: Journal of Applied Microbiology
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