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Colistin resistant

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https://www.readbyqxmd.com/read/29034106/epidemiology-and-antibiotic-resistance-phenotypes-of-diarrheagenic-escherichia-coli-responsible-for-infantile-gastroenteritis-in-ouagadougou-burkina-faso
#1
Ali Konaté, René Dembélé, Nathalie K Guessennd, Fernique Konan Kouadio, Innocent Kouamé Kouadio, Mohamed Baguy Ouattara, Wendpoulomdé A D Kaboré, Assèta Kagambèga, Haoua Cissé, Hadiza Bawa Ibrahim, Touwendsida Serge Bagré, Alfred S Traoré, Nicolas Barro
The emergence and persistence of multidrug-resistant (MDR) diarrheagenic Escherichia coli (DEC) causing acute diarrhea is a major public health challenge in developing countries. The aim of this study was to evaluate the resistance phenotypes of DEC isolated from stool samples collected from children less than 5 years of age with acute diarrhea living in Ouagadougou/Burkina Faso. From August 2013 to October 2015, this study was carried out on 31 DEC strains of our study conducted in "Centre Médical avec Antenne Chirurgicale (CMA)" Paul VI and CMA of Schiphra...
September 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/29031106/new-insights-into-resistance-to-colistin-and-third-generation-cephalosporins-of-escherichia-coli-in-poultry-portugal-novel-blactx-m-166-and-blaesac-genes
#2
Vera Manageiro, Lurdes Clemente, Rafael Graça, Ivone Correia, Teresa Albuquerque, Eugénia Ferreira, Manuela Caniça
The increasing incidence of intestinal colonization with extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae and Gram negative organisms that has been observed in food animals such as poultry, cattle and pigs, are suggestive that animals, food and environment are potential sources of ESBL-producing bacteria. Hence, the aim of this study was to characterized commensal E. coli obtained from healthy broiler and turkey flocks at slaughter for the presence of penicillinases-, ESBL-, extended-spectrum AmpC (ESAC)-, plasmid-mediated quinolone resistance- and MCR-encoding genes...
October 4, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29030447/housefly-musca-domestica-and-blow-fly-protophormia-terraenovae-as-vectors-of-colistin-resistance-genes-carrying-bacteria
#3
Jilei Zhang, Jiawei Wang, Li Chen, Afrah Kamal Yassin, Patrick Kelly, Patrick Butaye, Jing Li, Jiansen Gong, Russell Cattley, Kezong Qi, Chengming Wang
Flies have the capacity to transfer pathogens between different environments, acting as one of the most important vectors of human diseases worldwide. In this study, we trapped flies on a university campus and tested them for mobile resistance genes against colistin, a last-resort antibiotic in human medicine for treating clinical infections caused by multidrug-resistant Gram-negative bacteria. Quantitative PCRs we developed showed that 34.1% of Musca domestica (86/252) and 51.1% of Protophormia terraenovae (23/45) were positive for the mcr-1, 1...
October 13, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29030311/potential-transmission-opportunity-of-ctx-m-producing-escherichia-coli-in-large-scale-chicken-farm-in-vietnam
#4
Ngan Bui Thi Kim, Huong Bui Thi Mai, Shuhei Ueda, Tuyen Le Danh, Yoshimasa Yamamoto, Itaru Hirai
OBJECTIVES: Extended spectrum β-lactamase (ESBL)-producing Escherichia coli has been spread out worldwide. We investigated blaCTX-M-positive E. coli in a Vietnamese large-size chicken farm, and evaluated whether there was any different prevalence and molecular characters of blaCTX-M-positive E. coli between the large size chicken farm and a Vietnamese community. METHODS: Fecal samples were collected from 24 human individuals and 38 chickens of a large-scale chicken farm, and from 51 human and 36 chickens of a community...
October 10, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29028568/virulence-genotypes-and-antimicrobial-susceptibility-patterns-of-arcobacter-butzleri-isolated-from-seafood-and-its-environment
#5
Srinu Rathlavath, Vandita Kohli, Asem Sanjit Singh, Manjusha Lekshmi, Gayatri Tripathi, Sanath Kumar, Binaya Bhusan Nayak
Arcobacter butzleri is an emerging pathogen isolated from animals, food and the environment. In this study, 147 A. butzleri isolated from seafood and the coastal environment were tested for the presence of ten putative virulence genes (cadF, cj1349, ciaB, mviN, pldA, tlyA, hecA, hecB, irgA, iroE) and antimicrobial susceptibilities. Majority of the isolates harbored mviN (100%), cj1349 (97.2%), ciaB (95.9%), tlyA (91.8%), pldA (91.1%) and cadF (89.7%). Lower detection rates were observed for hecA (10.8%), hecB (19%), iroE (12...
October 3, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29028174/could-frequent-carbapenem-use-be-a-risk-factor-for-colistin-resistance
#6
Aycan Gundogdu, Aysegul Ulu-Kilic, Huseyin Kilic, Esra Ozhan, Dilek Altun, Ozlem Cakir, Emine Alp
AIMS: The antibiotic colistin, which had been previously abandoned, is being brought back as a last line of defense against bacterial infection. However, colistin resistance was reported shortly after its reintroduction. This study evaluated the risk factors for colonization/infections due to colistin-resistant Acinetobacter baumannii (ColR-Ab) and Klebsiella pneumoniae (ColR-Kp) strains and characterized the molecular epidemiology of these two strains. RESULTS: Age, previous hospitalization duration, and previous use of carbapenem and colistin were risk factors for ColR-Kp, whereas previous use of carbapenem and colistin was a risk factor for ColR-Ab...
October 13, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29026662/intrathecal-and-intraventricular-antibiotics-for-postoperative-gram-negative-meningitis-and-ventriculitis
#7
Saad Akhtar Khan, Muhammad Waqas, Usman T Siddiqui, Muhammad Shahzad Shamim, Karim Rizwan Nathani, Rashid Jooma, Faisal Mehmood
BACKGROUND: Postoperative meningitis is a growing cause of concern, especially with the evolution of multidrug-resistant organism. The authors evaluate the use of intraventricular/intrathecal (IVT/IT) antibiotics for postoperative gram-negative meningitis in patients whom intravenous antibiotics were ineffective. METHODS: Medical records were retrospectively reviewed and neurosurgery patients with gram-negative postoperative infection meningitis/ventriculitis were enrolled in the study...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29026355/colistin-and-polymyxin-b-minimal-inhibitory-concentrations-determined-by-etest-found-unreliable-for-gram-negative-bacilli
#8
Shelby Simar, Diane Sibley, Deborah Ashcraft, George Pankey
BACKGROUND: A reliable method of polymyxin B and E (colistin) susceptibility testing remains elusive. These drugs diffuse poorly into agar, creating potentially inaccurate Etest and disk diffusion results, and testing by these methods is not recommended. Broth microdilution is the reference testing method, although it can be sometimes difficult to interpret. Currently, when a colistin susceptibility test is ordered for a patient in the Ochsner Health System, our diagnostic microbiology laboratory performs the Etest...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/29020404/colistin-vs-ceftazidime-avibactam-in-the-treatment-of-infections-due-to-carbapenem-resistant-enterobacteriaceae
#9
David van Duin, Judith J Lok, Michelle Earley, Eric Cober, Sandra S Richter, Federico Perez, Robert A Salata, Robert C Kalayjian, Richard R Watkins, Yohei Doi, Keith S Kaye, Vance G Fowler, David L Paterson, Robert A Bonomo, Scott Evans
Background: The efficacy of ceftazidime-avibactam - a cephalosporin-β-lactamase inhibitor combination with in vitro activity against Klebsiella pneumoniae carbapenemase (KPC)-producing carbapenem-resistant Enterobacteriaceae (CRE) - as compared to colistin remains unknown. Methods: Patients initially treated with either ceftazidime-avibactam or colistin for CRE infections were selected from the Consortium on resistance against carbapenems in Klebsiella and other Enterobacteriaceae (CRACKLE), a prospective, multicenter, observational study...
September 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29019312/widespread-distribution-of-mcr-1-bearing-bacteria-in-the-ecosystem-2015-to-2016
#10
Kaichao Chen, Edward Wai-Chi Chan, Miaomiao Xie, Liangwei Ye, Ning Dong, Sheng Chen
The recently discovered colistin resistance-encoding element, mcr-1, adds to the list of mobile resistance genes whose products rapidly erode the antimicrobial efficacy of not only the commonly used antibiotics, but also the last line agents of carbapenems and colistin. The relative prevalence of mcr-1-bearing strains in various ecological niches including 1,371 food samples, 480 animal faecal samples, 150 human faecal samples and 34 water samples was surveyed using a novel in-house method. Bacteria bearing mcr-1 were commonly detected in water (71% of samples), animal faeces (51%), food products (36%), and exhibited stable carriage in 28% of human subjects surveyed...
September 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29017452/whole-genome-sequencing-for-the-molecular-characterization-of-carbapenem-resistant-klebsiella-pneumoniae-strains-isolated-at-the-italian-asst-fatebenefratelli-sacco-hospital-2012-2014
#11
Sara Giordana Rimoldi, Bernardina Gentile, Cristina Pagani, Annamaria Di Gregorio, Anna Anselmo, Anna Maria Palozzi, Antonella Fortunato, Valentina Pittiglio, Anna Lisa Ridolfo, Maria Rita Gismondo, Giuliano Rizzardini, Florigio Lista
BACKGROUND: The emergence of carbapenem-resistant Klebsiella pneumoniae strains is threatening antimicrobial treatment. METHODS: Sixty-eight carbapenemase-producing K. pneumoniae strains isolated at Luigi Sacco University Hospital-ASST Fatebenefratelli Sacco (Milan, Italy) between 2012 and 2014 were characterised microbiologically and molecularly. They were tested for drug susceptibility and carbapenemase phenotypes, investigated by means of repetitive extra-genic palindromic polymerase chain reaction (REP-PCR), and fully sequenced by means of next-generation sequencing for the in silico analysis of multi-locus sequence typing (MLST), their resistome, virulome and plasmid content, and their core single nucleotide polymorphism (SNP) genotypes...
October 10, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29017267/colistin-resistance-in-carbapenem-resistant-klebsiella-pneumoniae-de-novo-or-drug-exposure
#12
Nenad Macesic, Brian Nelson, Anne-Catrin Uhlemann
No abstract text is available yet for this article.
August 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28993143/ceftolozane-tazobactam-activity-against-drug-resistant-enterobacteriaceae-and-pseudomonas-aeruginosa-causing-health-care-associated-infections-in-the-asia-pacific-region-apac-minus-china-australia-and-new-zealand-report-from-an-antimicrobial-surveillance-program
#13
M A Pfaller, D Shortridge, H S Sader, M Castanheira, R K Flamm
OBJECTIVES: To evaluate the in vitro activity of ceftolozane-tazobactam and comparator agents tested against Enterobacteriaceae and Pseudomonas aeruginosa isolates from patients in the Asia-Pacific region (APAC) with health care associated infections (HAI). Ceftolozane-tazobactam is an antipseudomonal cephalosporin combined with a well-established β-lactamase inhibitor. METHODS: A total of 1,963 gram-negative organisms (489 P. aeruginosa and 1,474 Enterobacteriaceae) were consecutively collected using a prevalence-based approach from 14 medical centers in the APAC region...
October 6, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28991315/-impact-of-rational-use-of-antibiotics-in-a-third-level-clinic-in-colombia
#14
Christian J Pallares, Juan C Cataño
BACKGROUND: The increasing resistance of bacteria to antibiotics threatens the survival of patients and health costs. AIM: To determine the impact of an antimicrobial stewardship program in bacterial resistance and antibiotic consumption. MATERIALS AND METHODS: Quasi experimental study in a third level clinic in the city of Medellin, that evaluate in two time periods (pre-intervention between October 2012 and September 2013 and post intervention between October 2013 and September 2014) the impact of an antimicrobial stewardship program in terms of antibiotic consumption and bacterial ecology...
June 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28986476/colistin-is-substrate-of-the-carnitine-organic-cation-transporter-2-octn2-slc22a5
#15
Michele Visentin, Zhibo Gai, Angelo Torozi, Christian Hiller, Gerd A Kullak-Ublick
Colistin is a polycation antibiotic used for the treatment of multidrug-resistance (MDR) gram-negative infections; nevertheless, its use is often limited by the high incidence of renal damage. The mechanism underlying colistin-induced nephrotoxicity is not known, but perhaps related to its accumulation in the renal cortex upon extensive reabsorption from the nascent urine. Because little is known about the membrane transport of colistin, the purpose of the present study was to characterize better the transport system involved in colistin renal handling by using HEK293 cells stably transfected with the main organic cation transporters expressed at the apical membrane of the proximal tubule...
October 6, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28984232/chromagar-col-apse-a-selective-bacterial-culture-medium-for-the-isolation-and-differentiation-of-colistin-resistant-gram-negative-pathogens
#16
Muhd Haziq F Abdul Momin, David C Bean, Rene S Hendriksen, Marisa Haenni, Lynette M Phee, David W Wareham
PURPOSE: A selective chromogenic culture medium for the laboratory isolation and differentiation of colistin resistant Acinetobacter, Pseudomonas, Stenotrophomonas and Enterobacteriaceae spp. (CHROMagar COL-APSE) was developed, evaluated and compared to an existing selective bacterial culture medium (SuperPolymyxin). METHODOLOGY: The medium was challenged with 84 isolates, including polymyxin B (POL B)-susceptible and -resistant type strains and colistin (COL)-resistant organisms recovered from human and animal samples...
October 6, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28983088/emergence-and-clonal-spread-of-colistin-resistance-due-to-multiple-mutational-mechanisms-in-carbapenemase-producing-klebsiella-pneumoniae-in-london
#17
Jonathan A Otter, Michel Doumith, Frances Davies, Siddharth Mookerjee, Eleonora Dyakova, Mark Gilchrist, Eimear T Brannigan, Kathleen Bamford, Tracey Galletly, Hugo Donaldson, David M Aanensen, Matthew J Ellington, Robert Hill, Jane F Turton, Katie L Hopkins, Neil Woodford, Alison Holmes
Carbapenemase-producing Enterobacteriaceae (CPE) are emerging worldwide, limiting therapeutic options. Mutational and plasmid-mediated mechanisms of colistin resistance have both been reported. The emergence and clonal spread of colistin resistance was analysed in 40 epidemiologically-related NDM-1 carbapenemase producing Klebsiella pneumoniae isolates identified during an outbreak in a group of London hospitals. Isolates from July 2014 to October 2015 were tested for colistin susceptibility using agar dilution, and characterised by whole genome sequencing (WGS)...
October 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28981866/outer-membrane-protein-a-contributes-to-antimicrobial-resistance-of-acinetobacter-baumannii-through-the-ompa-like-domain
#18
Hyo Il Kwon, Shukho Kim, Man Hwan Oh, Seok Hyeon Na, Yoo Jeong Kim, Young Ho Jeon, Je Chul Lee
Objectives: Acinetobacter baumannii outer membrane protein A (AbOmpA) is involved in bacterial pathogenesis. However, the role of AbOmpA in the antimicrobial resistance of A. baumannii has not been fully elucidated. This study aimed to investigate the role of the OmpA-like domain of AbOmpA in the antimicrobial resistance of A. baumannii . Methods: The MICs of antimicrobial agents for the WT A. baumannii ATCC 17978, Δ ompA mutant, OmpA-like domain-deleted (amino acids 223-356) AbOmpA mutant and single-copy ompA -complemented strain were determined by the Etest method...
July 24, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28979332/nephrotoxicity-of-high-and-conventional-dosing-regimens-of-colistin-a-randomized-clinical-trial
#19
Atefeh Ordooei Javan, Shervin Shokouhi, Zahra Sahraei, Jamshid Salamzadeh, Saeed Azad Armaki
Nephrotoxicity has been a major long-standing concern about colistin.This study was designed to compare nephrotoxicity of high dose and conventional dose of colistin. A randomized open-labeled clinical trial on 40 patients with multi-drug resistant gram negative infections was designed. Patients were allocated into two equal-size groups receiving high (a loading dose of 9 million international units (MIU) and maintenance doses of 4.5 MIU every 12 h) and conventional dose (2 MIU every 8 h) of colistin. Blood samples were taken on day 1, 3, 5, 7 and 10 of treatment for measuring serum cystatin C (Cys C) levels...
2017: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/28978685/detection-of-colistin-resistant-mcr-1-positive-escherichia-coli-using-inhibition-by-edta-and-zeta-potential-assays
#20
Fernanda Esposito, Miriam R Fernandes, Ralf Lopes, Maria Muñoz, Caetano P Sabino, Marcos P Cunha, Ketrin C Silva, Rodrigo Cayô, Willames M Martins, Andrea M Moreno, Terezinha Knöbl, Ana C Gales, Nilton Lincopan
The emergence and rapid dissemination of colistin-resistant Escherichia coli carrying the plasmid-mediated mcr-1 gene has created an urgent need to develop specific screening methods. In this study, we evaluate four assays based on the inhibition of the MCR-1 activity by EDTA: i) a combined disk test (CDT) comparing the inhibition zones of colistin (10 μg) and colistin-plus-EDTA (10 μg-plus-100 mM); ii) reduction of colistin MIC (CMR) in the presence of EDTA (80 μg/mL); iii) a modified rapid polymyxin Nordmann/Poirel test (MPNP) and; iv) alteration of Zeta potential (RZP= ZP+EDTA/ZP-EDTA)...
October 4, 2017: Journal of Clinical Microbiology
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