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Colistin resistance

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https://www.readbyqxmd.com/read/29165563/ceftazidime-avibactam-alone-or-in-combination-with-aztreonam-against-colistin-resistant-and-carbapenemase-producing-klebsiella-pneumoniae
#1
Aurélie Jayol, Patrice Nordmann, Laurent Poirel, Véronique Dubois
No abstract text is available yet for this article.
November 18, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29165525/-the-colistin-mic-determination-in-acinetobacter-baumannii-should-it-be-reviewed
#2
Xabier Villanueva, Andrés Opazo-Capurro, Mario Quezada-Aguiluz, Mariana Domínguez, Helia Bello-Toledo, Gerardo González-Rocha
Currently, there is a controversy in how to determine the minimal inhibitory concentration (MIC) of colistin against Acinetobacter baumannii. We compared three methods, concluding that the addition of Tween-80 (0.002%) to Müller-Hinton broth in the microdilution method could improve MIC determination and it could reduce false resistance.
August 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/29163422/a-novel-inca-c1-group-conjugative-plasmid-encoding-vim-1-metallo-beta-lactamase-mediates-the-acquisition-of-carbapenem-resistance-in-st104-klebsiella-pneumoniae-isolates-from-neonates-in-the-intensive-care-unit-of-v-monaldi-hospital-in-naples
#3
Eliana P Esposito, Stefano Gaiarsa, Mariateresa Del Franco, Valeria Crivaro, Mariano Bernardo, Susanna Cuccurullo, Francesca Pennino, Maria Triassi, Piero Marone, Davide Sassera, Raffaele Zarrilli
The emergence of carbapenemase producing Enterobacteriaceae has raised major public health concern. The aim of this study was to investigate the molecular epidemiology and the mechanism of carbapenem resistance acquisition of multidrug-resistant Klebsiella pneumoniae isolates from 20 neonates in the neonatal intensive care unit (NICU) of the V. Monaldi Hospital in Naples, Italy, from April 2015 to March 2016. Genotype analysis by pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST) identified PFGE type A and subtypes A1 and A2 in 17, 2, and 1 isolates, respectively, and assigned all isolates to sequence type (ST) 104...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29163387/a-multiplex-sybr-green-real-time-pcr-assay-for-the-detection-of-three-colistin-resistance-genes-from-cultured-bacteria-feces-and-environment-samples
#4
Jiyun Li, Xiaomin Shi, Wenjuan Yin, Yang Wang, Zhangqi Shen, Shuangyang Ding, Shaolin Wang
The aim of the study was to develop a multiplex assay for rapid detection of mcr-1, mcr-2, and mcr-3, a group of genes of conferring resistance to colistin mediated by plasmid in Enterobacteriaceae. A SYBR Green based real-time PCR assay has been designed to detect the mcr genes, and applied to cultured bacteria, feces and soil samples. All three mcr genes could be detected with a lower limit of 10(2) cultured bacteria. This test was highly specific and sensitive, and generated no false-positive results. The assay was also conclusive when applied to feces and soil samples containing mcr-1-positive Escherichia coli, which could facilitate the screening of mcr genes not only in the bacteria, but also directly from the environment...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29162308/a-novel-series-of-enoyl-reductase-inhibitors-targeting-the-eskape-pathogens-staphylococcus-aureus-and-acinetobacter-baumannii
#5
Jieun Kwon, Tina Mistry, Jinhong Ren, Michael E Johnson, Shahila Mehboob
S. aureus and A. baumannii are among the ESKAPE pathogens that are increasingly difficult to treat due to the rise in the number of drug resistant strains. Novel therapeutics targeting these pathogens are much needed. The bacterial enoyl reductase (FabI) is as potentially significant drug target for developing pathogen-specific antibiotics due to the presence of alternate FabI isoforms in many other bacterial species. We report the identification and development of a novel N-carboxy pyrrolidine scaffold targeting FabI in S...
November 11, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29160808/interplay-between-colistin-resistance-virulence-and-fitness-in-acinetobacter-baumannii
#6
REVIEW
Gabriela Jorge Da Silva, Sara Domingues
Acinetobacter baumannii is an important opportunistic nosocomial pathogen often resistant to multiple antibiotics classes. Colistin, an "old" antibiotic, is now considered a last-line treatment option for extremely resistant isolates. In the meantime, resistance to colistin has been reported in clinical A. baumannii strains. Colistin is a cationic peptide that disrupts the outer membrane (OM) of Gram-negative bacteria. Colistin resistance is primarily due to post-translational modification or loss of the lipopolysaccharide (LPS) molecules inserted into the outer leaflet of the OM...
November 21, 2017: Antibiotics
https://www.readbyqxmd.com/read/29160518/evaluation-of-carbapenem-resistant-enterobacteriaceae-in-a-tertiary-level-reference-hospital-in-rio-grande-do-sul-brazil
#7
Vinícius Victor Lorenzoni, Danielly da Costa Silva, Roberta Filipini Rampelotto, Patrícia Chaves Brites, Bárbara Villa, Rosmari Hörner
INTRODUCTION: The rapid global spread of carbapenem-resistant Enterobacteriaceae (CRE) is a threat to the health system. METHODS: We evaluated the antimicrobial susceptibility profiles of 70 CRE isolated in a tertiary hospital in Brazil between August and December 2015, and determined their resistance mechanisms. RESULTS: The most prevalent microorganism was Klebsiella pneumoniae (95.7%); it showed high-level resistance to carbapenems (>98%), with sensitivity to colistin (91...
September 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29160428/plasmid-mediated-mcr-1-in-carbapenem-susceptible-escherichia-coli-st156-causing-a-blood-infection-an-unnoticeable-spread-of-colistin-resistance-in-brazil
#8
Flavia Rossi, Raquel Girardello, Carlos Morais, Ana Paula Cury, Layla Farage Martins, Aline Maria da Silva, Edson Abdala, João Carlos Setubal, Alberto José da Silva Duarte
OBJECTIVE: We describe an IncX4 pHC891/16mcr plasmid carrying mcr-1 in a colistin-resistant and carbapenem-susceptible E. coli isolate (HC891/16), ST156, which caused a blood infection in a Brazilian patient with gallbladder adenocarcinoma. METHODS: Strain HC891/16 was subjected to whole genome sequencing using the MiSeq Platform (Illumina, Inc., USA). Assembly was performed using Mira and ABACAS. RESULTS: The isolates showed resistance only to ciprofloxacin, ampicillin and cefoxitin, and whole-genome sequencing revealed the presence of aac(6')Ib-cr and blaTEM1...
October 2017: Clinics
https://www.readbyqxmd.com/read/29156858/risk-factors-for-colistin-associated-nephrotoxicity-and-mortality-in-critically-ill-patients
#9
Hüseyin Özkarakaş, Işıl Köse, Çiler Zincircioğlu, Sibel Ersan, Gürsel Ersan, Nimet Şenoğlu, Şükran Köse, Rıza Hakan Erbay
Background/aim: Colistin is gaining popularity against multidrug-resistant bacteria. The primary concern with colistin is its nephrotoxicity (NT). The aim of this study was to evaluate the incidence and risk factors for NT and to evaluate the risk factors for mortality in the toxicity group. Materials and methods: NT was defined according to the RIFLE criteria. Data of patients who did or did not develop NT were compared. Positive and negative predictive values, risk ratio, and correlation coefficients were calculated...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29154715/virulence-and-antibiotic-resistance-of-vibrio-parahaemolyticus-isolates-from-seafood-from-three-developing-countries-and-of-worldwide-environmental-seafood-and-clinical-isolates-from-2000-to-2017
#10
Mohammad M Obaidat, Alaa E Bani Salman, Amira A Roess
Vibrio parahaemolyticus is a leading cause of seafood-associated illness. This study investigated the prevalence, virulence, and antibiotic resistance of V. parahaemolyticus in three low- and middle-income countries. Freshly caught fish samples (n = 330) imported to Jordan from Yemen, India, and Egypt were tested. The overall prevalence of V. parahaemolyticus was 15% (95% confidence interval: 11 to 19%). Three isolates (6%) were positive for the thermostable direct hemolysin-related (trh) gene, and all isolates was negative for the thermostable direct hemolysin (tdh) gene...
November 20, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29152678/first-year-results-of-an-antibiotic-stewardship-program-in-a-greek-tertiary-care-hospital
#11
K Chrysou, O Zarkotou, S Kalofolia, P Papagiannakopoulou, G Chrysos, K Themeli-Digalaki, A Tsakris, S Pournaras
The aim of this study was to investigate the effect of the implementation of an antibiotic stewardship program (ASP) on antibiotic consumption in our 428-bed hospital. The Infection Control Committee implemented an ASP beginning in January 2016, aiming to reduce inappropriate antibiotic use through improved prescribing practices. The ASP included both pre-authorization and prospective audit and feedback strategies. We collected pharmacy and hospital data for the years 2015 (pre-intervention) and 2016 (post-intervention)...
November 19, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29151282/epidemiology-and-impact-of-bloodstream-infections-among-kidney-transplant-recipients-a-retrospective-single-center-experience
#12
Ali M Shendi, Gabriel Wallis, Helena Painter, Mark Harber, Sophie Collier
BACKGROUND: Bloodstream infections (BSI) represent an important source of morbidity and mortality, as well as an increasing therapeutic challenge, among solid organ transplant recipients. Understanding the epidemiological and microbiological characteristics of BSI following renal transplantation is paramount to the implementation of appropriate preventative and therapeutic measures. METHODS: We conducted a retrospective review of all BSI episodes occurring between July 2009 and April 2016 in adult patients, who received a renal transplant at Royal Free London hospital...
November 19, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29149302/activity-of-colistin-alone-or-in-combination-with-rifampicin-or-meropenem-in-a-carbapenem-resistant-bioluminescent-pseudomonas-aeruginosa-intraperitoneal-murine-infection-model
#13
Yun Cai, Deqing Yang, Jin Wang, Rui Wang
Background: Carbapenem-resistant Pseudomonas aeruginosa (CRPA) infections represent a major therapeutic problem and combination therapy may be the chemotherapeutic option. Methods: Bioluminescent CRPA was developed through sequential subcultures in subinhibitory concentrations of meropenem from an engineered strain of bioluminescent PA Xen5. Then CRPA was injected intraperitoneally to establish an intraperitoneal murine infection model. Treatments of colistin alone or combined with rifampicin or meropenem were started 1 h after infection...
November 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29148380/high-rate-of-mcr-1-producing-escherichia-coli-and-klebsiella-pneumoniae-among-pigs-portugal
#14
Nicolas Kieffer, Marta Aires-de-Sousa, Patrice Nordmann, Laurent Poirel
The mcr-1 (mobile colistin resistance 1) gene, which encodes phosphoethanolamine transferase, has been recently identified as a source of acquired resistance to polymyxins in Escherichia coli. Using the SuperPolymyxin selective medium, we prospectively screened 100 pigs at 2 farms in Portugal for polymyxin-resistant Enterobacteriaceae and recovered 98 plasmid-mediated MCR-1-producing isolates. Most isolates corresponded to nonclonally related E. coli belonging to many sequence types; we also found 2 Klebsiella pneumoniae sequence types...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29147117/colistin-resistance-of-pseudomonas-aeruginosa-isolated-from-snakes-in-taiwan
#15
Po-Yu Liu, Ling-Ling Weng, Shu-Ying Tseng, Chou-Chen Huang, Ching-Chang Cheng, Yan-Chiao Mao, Kwong-Chung Tung
This study included fifty-eight isolates of P. aeruginosa from the oral cavity of snakes that were recruited from clinical cases, captive and wild snakes. The minimum inhibitory concentrations (MICs) for the determination of susceptibility were identified by the broth microdilution method. Polymerase chain reaction (PCR) was employed to detect β-lactamases genes. With regard to antipseudomonal antibiotics, the lowest nonsusceptible rates were in aztreonam (15%), piperacillin/tazobactam (12%), and amikacin (9%)...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/29141051/molecular-and-epidemiological-characterization-of-carbapenemase-producing-enterobacteriaceae-in-norway-2007-to-2014
#16
Ørjan Samuelsen, Søren Overballe-Petersen, Jørgen Vildershøj Bjørnholt, Sylvain Brisse, Michel Doumith, Neil Woodford, Katie L Hopkins, Bettina Aasnæs, Bjørg Haldorsen, Arnfinn Sundsfjord
The prevalence of carbapenemase-producing Enterobacteriaceae (CPE) is increasing worldwide. Here we present associated patient data and molecular, epidemiological and phenotypic characteristics of all CPE isolates in Norway from 2007 to 2014 confirmed at the Norwegian National Advisory Unit on Detection of Antimicrobial Resistance. All confirmed CPE isolates were characterized pheno- and genotypically, including by whole genome sequencing (WGS). Patient data were reviewed retrospectively. In total 59 CPE isolates were identified from 53 patients...
2017: PloS One
https://www.readbyqxmd.com/read/29138303/cxc-chemokines-exhibit-bactericidal-activity-against-multidrug-resistant-gram-negative-pathogens
#17
Matthew A Crawford, Debra J Fisher, Lisa M Leung, Sara Lomonaco, Christine Lascols, Antonio Cannatelli, Tommaso Giani, Gian Maria Rossolini, Yohei Doi, David R Goodlett, Marc W Allard, Shashi K Sharma, Erum Khan, Robert K Ernst, Molly A Hughes
The continued rise and spread of antimicrobial resistance among bacterial pathogens pose a serious challenge to global health. Countering antimicrobial-resistant pathogens requires a multifaceted effort that includes the discovery of novel therapeutic approaches. Here, we establish the capacity of the human CXC chemokines CXCL9 and CXCL10 to kill multidrug-resistant Gram-negative bacteria, including New Delhi metallo-beta-lactamase-1-producing Klebsiella pneumoniae and colistin-resistant members of the family Enterobacteriaceae that harbor the mobile colistin resistance protein MCR-1 and thus possess phosphoethanolamine-modified lipid A...
November 14, 2017: MBio
https://www.readbyqxmd.com/read/29133565/emergence-of-chromosome-borne-colistin-resistance-gene-mcr-1-in-clinical-isolates-of-klebsiella-pneumoniae-from-india
#18
Sanjay Singh, Ashutosh Pathak, Awadhesh Kumar, Mohibur Rahman, Avinash Singh, Bruno G Zorn, Kashi N Prasad
Transmissible colistin resistance gene, mcr-1 has breached the one of the last line of defense for treatment of infections caused by carbapenem-resistant Enterobacteriaceae….
November 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29127051/genomic-analysis-of-in-vivo-acquired-resistance-to-colistin-and-rifampin-in-acinetobacter-baumannii
#19
Nadia Jaidane, Thierry Naas, Wejdene Mansour, Bechir Ben Radhia, Sofiene Jerbi, Noureddine Boujaafar, Olfa Bouallegue, Rémy A Bonnin
Acinetobacter baumannii is an opportunistic pathogen in health-care facilities responsible for nosocomial infections mostly in immune-compromised patients. Colistin resistance is increasingly reported worldwide in that species. We describe here in vivo selection of colistin and rifampin resistance in a carbapenem-resistant A. baumannii (Ab). Antimicrobial susceptibility testing, plasmid analysis, and Whole Genome Sequencing (WGS) were performed to fully characterize the resistome of AbS1 and AbS2 clinical isolates...
November 7, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29126221/identification-and-characterization-of-mcr-mediated-colistin-resistance-in-extraintestinal-escherichia-coli-from-poultry-and-livestock-in-china
#20
Afrah Kamal Yassin, Jilei Zhang, Jiawei Wang, Li Chen, Patrick Kelly, Patrick Butaye, Guangwu Lu, Jiansen Gong, Min Li, Lanjing Wei, Yaoyao Wang, Kezong Qi, Xiangan Han, Stuart Price, Terri Hathcock, Chengming Wang
Antimicrobial resistance to colistin has emerged worldwide threatening the efficacy of one of the last-resort antimicrobials used for the treatment of multidrug-resistant Enterobacteriaceae infection in humans. In this study, we investigated the presence of colistin resistance genes (mcr-1, mcr-2, mcr-3) in Escherichia coli strains isolated from poultry and livestock collected between 2004 and 2012 in China. Furthermore, we studied the maintenance and transfer of the mcr-1 gene in E. coli after serial passages...
November 8, 2017: FEMS Microbiology Letters
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