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https://www.readbyqxmd.com/read/28449463/efficacy-of-nebulized-colistin-based-therapy-without-concurrent-intravenous-colistin-for-ventilator-associated-pneumonia-caused-by-carbapenem-resistant-acinetobacter-baumannii
#1
Yong Kyun Kim, Jae Ha Lee, Hyun-Kyung Lee, Byung Cheol Chung, Seung Jung Yu, Ho-Young Lee, Jin-Han Park, Sunyoung Kim, Hyeon-Kuk Kim, Sungmin Kiem, Hang-Jea Jang
BACKGROUND: Although there have been studies regarding the role of nebulized colistin as adjunctive therapy of ventilator-associated pneumonia (VAP) caused by carbapenem-resistant Acinetobacter baumannii (CRAB), a paucity of information on the efficacy of nebulized colistin as monotherapy is available. METHODS: We retrospectively reviewed 219 patients with VAP caused by CRAB treated with either intravenous (n=93) or nebulized colistin (n=126), from March 2010 to November 2015...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28448572/clonality-virulence-determinants-and-profiles-of-resistance-of-clinical-acinetobacter-baumannii-isolates-obtained-from-a-spanish-hospital
#2
Elias Dahdouh, Rosa Gómez-Gil, Sonsoles Pacho, Jesús Mingorance, Ziad Daoud, Monica Suárez
INTRODUCTION: Acinetobacter baumannii is a nosocomial pathogen that is showing increasing rates of carbapenem resistance. Multi-Drug Resistant (MDR) International Clones (ICs), associated with certain oxacillinases, are being reported globally. This organism also harbors numerous virulence determinants. In this study, we aim at characterizing A. baumannii isolated from a Spanish hospital in terms of antimicrobial susceptibility, clonality, carbapenemase genes harbored, and virulence determinants expressed...
2017: PloS One
https://www.readbyqxmd.com/read/28446900/bioactive-molecule-from-streptomyces-sp-mitigates-mdr-klebsiella-pneumoniae-in-zebrafish-infection-model
#3
Lalitha Cheepurupalli, Thiagarajan Raman, Sudarshan S Rathore, Jayapradha Ramakrishnan
The emergence and spread of multi-drug resistant (MDR) especially carbapenem-resistant Klebsiella pneumoniae is a major emerging threat to public health, leading to excess in mortality rate as high as 50-86%. MDR K. pneumoniae manifests all broad mechanisms of drug resistance, hence development of new drugs to treat MDR K. pneumoniae infection has become a more relevant question in the scientific community. In the present study a potential Streptomyces sp. ASK2 was isolated from rhizosphere soil of medicinal plant...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28446572/evaluation-of-the-accelerate-pheno%C3%A2-system-for-fast-identification-and-antimicrobial-susceptibility-testing-from-positive-blood-culture-in-gram-negative-bloodstream-infection
#4
Matthias Marschal, Johanna Bachmaier, Ingo Autenrieth, Philipp Oberhettinger, Matthias Willmann, Silke Peter
Bloodstream infections (BSI) are an important cause of morbidity and mortality. Increasing rates of antimicrobial resistant pathogens limit treatment options, prompting an empirical use of broad-range antibiotics. Fast and reliable diagnostic tools are needed to provide adequate therapy in a timely manner and to enable a de-escalation of treatment.The Accelerate Pheno™ system (Accelerate Diagnostics, USA) is a fully automated test system that performs both identification (ID) and antimicrobial susceptibility testing (AST) directly from positive blood cultures within approx...
April 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28445786/metallo-%C3%AE-lactamase-inhibitors-by-bioisosteric-replacement-preparation-activity-and-binding
#5
Susann Skagseth, Sundus Akhter, Marianne H Paulsen, Zeeshan Muhammad, Silje Lauksund, Ørjan Samuelsen, Hanna-Kirsti S Leiros, Annette Bayer
Bacterial resistance is compromising the use of β-lactam antibiotics including carbapenems. The main resistance mechanism against β-lactams is hydrolysis of the β-lactam ring mediated by serine- or metallo-β-lactamases (MBLs). Although several inhibitors of MBLs have been reported, none has been developed into a clinically useful inhibitor. Mercaptocarboxylic acids are among the most prominent scaffolds reported as MBL inhibitors. In this study, the carboxylate group of mercaptocarboxylic acids was replaced with bioisosteric groups like phosphonate esters, phosphonic acids and NH-tetrazoles...
April 14, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28445776/antimicrobial-resistance-in-the-bacteroides-fragilis-group-in-faecal-samples-from-patients-receiving-broad-spectrum-antibiotics
#6
Kia Cirkeline Møller Hansen, Simon A F Schwensen, Daniel Pilsgaard Henriksen, Ulrik Stenz Justesen, Thomas Vognbjerg Sydenham
Members of the Bacteroides fragilis group are opportunistic pathogens and cause severe infections including bacteraemia. As increased levels of antimicrobial resistance in B. fragilis group bacteria can be detected years after administration of specific antibiotics, monitoring antimicrobial susceptibility in the gut microbiota could be important. The objectives of this study were to 1) investigate the distribution of species and the occurrence of reduced antimicrobial susceptibility in the B. fragilis group from patients treated at departments with a high level of antibiotic use, 2) to determine the prevalence of the carbapenem resistance gene cfiA in B...
April 23, 2017: Anaerobe
https://www.readbyqxmd.com/read/28445009/evaluation-of-six-phenotypic-methods-for-the-detection-of-carbapenemases-in-gram-negative-bacteria-with-characterized-resistance-mechanisms
#7
Kunling Sun, Xiuyu Xu, Jinrong Yan, Liping Zhang
BACKGROUND: We compared the performance of the modified Hodge test (MHT), Triton Hodge test (THT), Carba NP test (CNPt), simplified Carba NP test (CNPt-direct), blue-Carba NP test (BCT), and carbapenem inactivation method (CIM) for rapid and accurate carbapenemase detection. METHODS: The methods were evaluated by using 256 gram-negative isolates, including 197 Enterobacteriaceae (79 Enterobacter spp., 74 Klebsiella spp., 33 Escherichia coli, 10 Citrobacter spp., and 1 Serratia marcescens), 51 Acinetobacter baumannii, and 8 Pseudomonas aeruginosa strains...
July 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28440605/-carbapenem-resistance-in-pseudomonas-aeruginosa-isolated-from-urine-cultures-prevalence-and-risk-factors
#8
J Álvarez-Otero, J L Lamas-Ferreiro, L González-González, I Rodríguez-Conde, M J Fernández-Soneira, A Arca-Blanco, J R Bermúdez-Sanjurjo, J de la Fuente-Aguado
OBJECTIVE: Pseudomonas aeruginosa is a non-fermentative gram-negative bacillus with a great ability to develop resistance to multiple antibiotics, including carbapenems, which is a growing problem worldwide. The aim of this study was to analyse the prevalence of carbapenem-resistant P. aeruginosa (CRPA) in urine cultures and to determine the risk factors associated with the development of carbapanem resistance. METHODS: Positive urine cultures to P. aeruginosa between September 2012 and September 2014 were identified...
April 25, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28438945/multi-hospital-occurrence-of-pan-resistant-klebsiella-pneumoniae-st147-with-an-isecp1-directed-blaoxa-181-insertion-into-the-mgrb-gene-in-the-united-arab-emirates
#9
Ágnes Sonnevend, Akela Ghazawi, Rayhan Hashmey, Aliasgher Haidermota, Safinaz Girgis, Mubarak Alfaresi, Mohammed Omar, David L Paterson, Hosam M Zowawi, Tibor Pál
The emergence of pan-resistant Klebsiella pneumoniae strains is an increasing concern. In the current study we describe a cluster of 9 pan-resistant K. pneumoniae ST147 isolates encountered in 4 patients over nearly one year in 3 hospitals of the United Arab Emirates. The isolates exhibited highly similar genotypes. All produced chromosomally encoded OXA-181 and the majority also produced the NDM-5 carbapenemase. Similarly to the previously described single isolate from the UAE, MS6671, the mgrB was disrupted by a functional, ISEcp1-driven blaOXA-181 insertion causing resistance to carbapenems...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28438937/incx2-and-incx1-x2-hybrid-plasmids-coexisting-in-fosa6-producing-escherichia-coli
#10
Qinglan Guo, Jiachun Su, Christi Lee McElheny, Nicole Stoesser, Yohei Doi, Minggui Wang
IncX plasmids are receiving much attention as vehicles of carbapenem and colistin resistance genes, such as blaNDM, blaKPC and mcr-1 Among them, IncX2 subgroup plasmids remain rare. Here we characterized IncX2 and IncX1-X2 hybrid plasmids coexisting in a FosA6-producing Escherichia coli strain, which were possibly generated as a consequence of recombination events between an R6K-like IncX2 plasmid and a pLN126_33-like IncX1 plasmid. Variable multidrug resistance mosaic regions were observed in these plasmids indicating their potential to serve as flexible carriers of resistance genes...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28438192/chryseobacterium-gleum-in-a-man-with-prostatectomy-in-senegal-a-case-report-and-review-of-the-literature
#11
O Arouna, F Deluca, M Camara, B Fall, B Fall, A Ba Diallo, J D Docquier, S Mboup
BACKGROUND: Here we report a rare case of a urinary tract infection due to Chryseobacterium gleum. This widely distributed Gram-negative bacillus is an uncommon human pathogen and is typically associated with health care settings. CASE PRESENTATION: We describe a case of urinary tract infection caused by Chryseobacterium gleum in a 68-year-old man of Wolof ethnicity (an ethnic group in Senegal, West Africa) who presented to our Department of Urology in a university teaching hospital (Hôpital Aristide Le Dantec) in Dakar, Senegal, 1 month after prostatectomy...
April 24, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28437232/epidemiological-physiological-and-molecular-characteristics-of-a-brazilian-collection-of-carbapenem-resistant-acinetobacter-baumannii-and-pseudomonas-aeruginosa
#12
Vanessa Cordeiro Dias, Juliana Alves Resende, André Netto Bastos, Lucas Quinet De Andrade Bastos, Victor Quinet De Andrade Bastos, Ricardo Villela Bastos, Cláudio Galuppo Diniz, Vânia Lúcia Da Silva
Nonfermenting Gram-negative bacteria such as Pseudomonas aeruginosa and Acinetobacter baumannii are widespread in the environment and are increasingly associated with nosocomial infections, often associated with multidrug-resistance phenotypes. This study aimed to evaluate epidemiological, physiological, and molecular characteristics of carbapenem resistance in P. aeruginosa and A. baumannii. In total, 63 nonreplicated strains (44 A. baumannii and 19 P. aeruginosa) were isolated from hospitalized patients. Antimicrobial resistance patterns, biocide tolerance, oxidative stress, hemolytic activity, and biofilm formation were assessed...
February 24, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28437228/first-case-of-ndm-1-producing-klebsiella-pneumoniae-in-annaba-university-hospital-algeria
#13
Amel Abderrahim, Nassima Djahmi, Charlotte Pujol, Sabina Nedjai, Mohamed Cherif Bentakouk, Djamila Kirane-Gacemi, Mazouz Dekhil, Albert Sotto, Jean-Philippe Lavigne, Alix Pantel
AIM: The aim of this study was to characterize two carbapenem-resistant Klebsiella pneumoniae isolates recovered from urine samples in a patient hospitalized at Annaba University hospital (Algeria) in 2014. RESULTS: Two K. pneumoniae isolates were studied because they proved resistant to almost all antibiotics tested with a high level resistance to ertapenem (minimum inhibitory concentration = 32 mg/L). The results of modified Hodge test and combined disk test (ROSCO Diagnostica, Taastrup, Denmark) were positive...
February 22, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28435019/epidemiology-and-trends-in-the-antibiotic-susceptibilities-of-gram-negative-bacilli-isolated-from-patients-with-intra-abdominal-infections-in-the-asia-pacific-region-2010-2013
#14
Ya-Ting Chang, Geoffrey Coombs, Thomas Ling, V Balaji, Camilla Rodrigues, Hiroshige Mikamo, Min-Ja Kim, Datin Ganeswrie Rajasekaram, Myrna Mendoza, Thean Yen Tan, Pattarachai Kiratisin, Yuxing Ni, Weinman Barry, Yingchun Xu, Yen-Hsu Chen, Po-Ren Hsueh
This study was conducted to investigate the epidemiology and antimicrobial susceptibility patterns of Gram-negative bacilli (GNB) isolated from intra-abdominal infections (IAIs) in the Asia-Pacific region (APR) from 2010-2013. A total of 17 350 isolates were collected from 54 centres in 13 countries in the APR. The three most commonly isolated GNB were Escherichia coli (46.1%), Klebsiella pneumoniae (19.3%) and Pseudomonas aeruginosa (9.8%). Overall, the rates of extended-spectrum β-lactamase (ESBL)-producing E...
April 20, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28434898/bacteraemia-due-to-ampc-%C3%AE-lactamase-producing-escherichia-coli-in-hospitalized-cancer-patients-risk-factors-antibiotic-therapy-and-outcomes
#15
Qing Zhang, Wenfang Zhang, Zheng Li, Changsen Bai, Ding Li, Shan Zheng, Peng Zhang, Sihe Zhang
AmpC β-lactamase-producing Escherichia coli (AmpC-EC) is one of the main antimicrobial resistant pathogens in patients with cancer. A cohort study was performed to evaluate the risk factors, antibiotic therapy, and outcomes of AmpC-EC bacteraemia in hospitalized cancer patients from September 2012 through December 2015. Two hundred forty-eight cases of E. coli bacteraemia were documented in cancer patients, 51 (20.6%) were caused by AmpC-EC and 197 (79.4%) were caused with non-AmpC-EC. Prior exposure to cephalosporins (OR 2...
April 12, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28434558/resistance-profiles-and-risk-factors-of-resistant-microorganisms-in-bacteraemia-of-abdominal-origin
#16
J Martín Jaramago, R Armero Ibáñez, J J Camarena Miñana, M Morales Suárez-Varela
OBJECTIVE: The presence of resistant microorganisms is a major cause of failure in initial empirical antimicrobial therapy. The objectives of this study are to determine the resistance profile of microorganisms that cause bacteraemia of abdominal origin and to identify whether the previous use of antibiotics and the place of acquisition of bacteraemia are risk factors associated with the presence of resistant organisms. MATERIAL AND METHODS: A clinical, observational, epidemiological, retrospective cohort study was conducted with all the adult patients admitted to a university hospital from 2011-2013...
April 20, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28431478/successful-treatment-of-multidrug-resistant-acinetobacter-baumannii-meningitis-with-ampicillin-sulbactam-in-primary-hospital
#17
Leitao Sun, Xiaohong Wang, Zefu Li
INTRODUCTION: Acinetobacter baumannii nosocomial infections, especially those due to multi-drug resistant strains, are increasingly detected. We want to find the effective treatment measures about multi-resistant Acinetobacter baumannii infections through this research. METHODOLOGY: The clinical features and the outcomes of twelve cases of nosocomial Acinetobacter baumannii meningitis treated with ampicillin sulbactam and intrathecal use of amikacin are reported in primary hospital...
April 21, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28429335/imipenem-resistance-in-serratia-marcescens-is-mediated-by-plasmid-expression-of-kpc-2
#18
W-Q Su, Y-Q Zhu, N-M Deng, L Li
OBJECTIVE: Imipenem is a broad-spectrum carbapenem antibiotic with applications against severe bacterial infections. Here, we describe the identification of imipenem-resistant Serratia marcescens in our hospital and the role of plasmid-mediated KPC-2 expression in imipenem resistance. MATERIALS AND METHODS: We used the modified Hodge test to detect carbapenemase produced in imipenem-resistant strains. RESULTS: His resistance can be transferred to E...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28427991/impact-of-the-pneumococcal-conjugate-vaccine-on-serotype-distribution-of-adult-non-invasive-streptococcus-pneumoniae-isolates-in-tokai-region-japan-2008-2016
#19
Yuri Furuya, Yuka Yamagishi, Hayato Okade, Takumi Kadota, Tori Funatsu, Maki Eto, Nobuhiko Nomura, Junichi Mitsuyama, Hiroshige Mikamo
The introduction of the 7-valent pneumococcal conjugate vaccine (PCV7) in February 2010 markedly reduced the burden of invasive pneumococcal disease and changed serotype distribution in Japan. In November 2013, PCV7 was replaced by the 13-valent pneumococcal conjugate vaccine (PCV13). We investigated the serotype distribution and susceptibility trends of non-invasive Streptococcus pneumoniae isolates collected from adult patients. A total of 504 pneumococcal isolates were collected during 4 periods between 2008 and 2016 (Period 1; between June 2008 and April 2009, Period 2; between September 2010 and March 2011, Period 3; between October 2011 and March 2012, Period 4; between August 2015 and January 2016)...
April 17, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28427842/predominance-of-international-clone-2-oxa-23-producing-acinetobacter-baumannii-clinical-isolates-in-greece-2015-results-of-a-nationwide-study
#20
Spyros Pournaras, Konstantina Dafopoulou, Mariateresa Del Franco, Olympia Zarkotou, Evangelia Dimitroulia, Efi Protonotariou, Aggeliki Poulou, Raffaele Zarrilli, Athanasios Tsakris
In a previous nationwide study in Greece, OXA-58 was the sole carbapenemase present among carbapenem-resistant Acinetobacter baumannii (CRAB) isolated between 2000 and 2009. In this study, the antibiotic resistances, carbapenemase gene content and clonal relatedness of 194 single-patient CRAB clinical isolates collected randomly during 2015 from 11 tertiary hospitals located throughout Greece were investigated. Antimicrobial susceptibility was determined using commercial and dilution methods. PCR for carbapenemase genes were performed...
April 18, 2017: International Journal of Antimicrobial Agents
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