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https://www.readbyqxmd.com/read/29451428/extended-spectrum-%C3%AE-lactamase-ampc-and-mbl-producing-gram-negative-bacteria-on-fresh-vegetables-and-ready-to-eat-salads-sold-in-local-markets
#1
Ramona Iseppi, Simona de Niederhäusern, Moreno Bondi, Patrizia Messi, Carla Sabia
We investigated the occurrence of extended-spectrum β-lactamase (ESBL), AmpC, and carbapenemase-producing Gram-negative bacteria isolated from 160 samples of fresh vegetables (n = 80) and ready-to-eat (RTE) prepacked salads (n = 80). Phenotypic and genotypic analyses were carried out on the isolates in terms of the species present and relative resistance. Resistance to β-lactam antibiotics was found in only 44 (24 from fresh vegetables and 20 from RTE salads) of a total of 312 Gram-negative strains (14.1%)...
February 16, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29450209/creation-and-assessment-of-a-clinical-predictive-calculator-and-mortality-associated-with-candida-krusei-bloodstream-infections
#2
Ryan Kronen, Kevin Hsueh, Charlotte Lin, William G Powderly, Andrej Spec
Background: Candida krusei bloodstream infection (CK BSI) is associated with high mortality, but whether this is due to underlying comorbidities in affected patients or the organism itself is unknown. Identifying patient characteristics that are associated with CK BSI is crucial for clinical decision-making and prognosis. Methods: We conducted a retrospective analysis of hospitalized patients with Candida BSI at our institution between 2002 and 2015. Data were collected on demographics, comorbidities, medications, procedures, central lines, vital signs, and laboratory values...
February 2018: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29449049/extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-national-study-of-antimicrobial-treatment-for-pediatric-urinary-tract-infection
#3
M Lagree, S Bontemps, R Dessein, F Angoulvant, F Madhi, A Martinot, R Cohen, F Dubos
OBJECTIVE: To evaluate clinical practices for ESBL-producing urinary tract infection (UTI) in France. METHODS: We performed an observational, retrospective, cross-sectional, hospital-based study in 22 pediatric departments of university or secondary care hospitals. We collected data of the last five patients presenting with ESBL-producing UTI in 2012 and the physicians' therapeutic approach to two case vignettes of acute non-septic ESBL-producing pyelonephritis (7-month-old girl) and cystitis (30-month-old girl)...
February 12, 2018: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/29447989/aetiology-of-lower-respiratory-tract-infection-in-adults-in-primary-care-a-prospective-study-in-11-european-countries
#4
Margareta Ieven, Samuel Coenen, Katherine Loens, Christine Lammens, Frank Coenjaerts, Anouk Vanderstraeten, Birgitta Henriques-Normark, Derrick Crook, Kris Huygen, Chris C Butler, Theo Jm Verheij, Paul Little, Kalina Zlateva, Anton van Loon, Eric Cj Claas, Herman Goossens
OBJECTIVES: To describe the role of bacteria (including bacterial resistance), viruses (including those recently described), and mixed bacterial-viral infections in adults presenting to primary care with lower respiratory tract infection (LRTI). METHODS: We enrolled 3104 adults with LRTI, 141 (4.5%) of whom had community-acquired pneumonia (CAP), and 2985 matched controls in a prospective study in 16 primary care networks in Europe, and followed patients up at 28-35 days...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29444952/treatment-of-infections-caused-by-extended-spectrum-beta-lactamase-ampc-and-carbapenemase-producing-enterobacteriaceae
#5
REVIEW
Jesús Rodríguez-Baño, Belén Gutiérrez-Gutiérrez, Isabel Machuca, Alvaro Pascual
Therapy of invasive infections due to multidrug-resistant Enterobacteriaceae (MDR-E) is challenging, and some of the few active drugs are not available in many countries. For extended-spectrum β-lactamase and AmpC producers, carbapenems are the drugs of choice, but alternatives are needed because the rate of carbapenem resistance is rising. Potential active drugs include classic and newer β-lactam-β-lactamase inhibitor combinations, cephamycins, temocillin, aminoglycosides, tigecycline, fosfomycin, and, rarely, fluoroquinolones or trimethoprim-sulfamethoxazole...
April 2018: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/29444761/chronic-infection-sustained-by-a-pseudomonas-aeruginosa-high-risk-clone-producing-the-vim-1-metallo-%C3%AE-lactamase-in-a-cystic-fibrosis-patient-after-lung-transplantation
#6
Simona Pollini, Claudia Mugnaioli, Daniela Dolce, Silvia Campana, Anna Silvia Neri, Giovanni Taccetti, Gian Maria Rossolini
BACKGROUND: The significance of chronic lung infection by multidrug-resistant (MDR) pathogens in Cystic Fibrosis (CF) transplanted patients remains controversial, and the available information is overall limited. Here we describe the case of a chronic infection, sustained by a metallo-β-lactamase (MBL)-producing P. aeruginosa strain, in a CF patient following lung transplantation. METHODS: Twelve P. aeruginosa isolates collected from a CF patient over a 15-years follow-up period after lung transplantation were analysed for their antibiotic susceptibility profile, MBL production and clonal relatedness...
February 12, 2018: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29443069/the-use-of-a-%C3%AE-lactamase-based-conductimetric-biosensor-assay-to-detect-biomolecular-interactions
#7
Marylène Vandevenne, Mathieu Dondelinger, Sami Yunus, Astrid Freischels, Régine Freischels, Oscar Crasson, Noureddine Rhazi, Pierre Bogaerts, Moreno Galleni, Patrice Filée
Biosensors are becoming increasingly important and implemented in various fields such as pathogen detection, molecular diagnosis, environmental monitoring, and food safety control. In this context, we used β-lactamases as efficient reporter enzymes in several protein-protein interaction studies. Furthermore, their ability to accept insertions of peptides or structured proteins/domains strongly encourages the use of these enzymes to generate chimeric proteins. In a recent study, we inserted a single-domain antibody fragment into the Bacillus licheniformis BlaP β-lactamase...
February 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29442147/-urosepsis
#8
Mathias W Pletz, Sebastian Weis, Christina Forstner, Florian Wagenlehner
Urosepsis is defined as a severe disease due to organ failure caused by a urinary tract infection. An empirical antibiotic therapy should be instigated within the first hour after diagnosis. Urine cultures and blood cultures should be performed before antibiotic treatment. Further diagnostics should be carried out at an early stage to enable an interventional focus control in the case of urinary tract obstruction or abscess formation, if necessary. Gram-negative pathogens are most frequently isolated. Extended spectrum beta-lactamase (ESBL) forming bacteria as a cause of urosepsis are increasing...
February 7, 2018: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/29442101/a-molecular-dynamics-study-of-the-complete-binding-process-of-meropenem-to-new-delhi-metallo-%C3%AE-lactamase-1
#9
Juan Duan, Chuncai Hu, Jiafan Guo, Lianxian Guo, Jia Sun, Zuguo Zhao
The mechanism of substrate hydrolysis of New Delhi metallo-β-lactamase 1 (NDM-1) has been reported, but the process in which NDM-1 captures and transports the substrate into its active center remains unknown. In this study, we investigated the process of the substrate entry into the NDM-1 activity center through long unguided molecular dynamics simulations using meropenem as the substrate. A total of 550 individual simulations were performed, each of which for 200 ns, and 110 of them showed enzyme-substrate binding events...
February 14, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29439654/prospective-study-on-human-fecal-carriage-of-enterobacteriaceae-possessing-mcr-1-and-mcr-2-genes-in-a-regional-hospital-in-hong-kong
#10
Wai-Sing Chan, Chun-Hang Au, Dona N Ho, Tsun-Leung Chan, Edmond Shiu-Kwan Ma, Bone Siu-Fai Tang
BACKGROUND: Human fecal carriage of Enterobacteriaceae possessing mobilized colistin resistance genes (mcr-1 and mcr-2) remains obscure in Hong Kong. As part of routine surveillance on emerging antibiotic resistance, we conducted a prospective study on this topic in a regional hospital in Hong Kong. METHODS: From October 31 to November 25, 2016, all fecal specimens submitted for routine analysis were included in this surveillance study. These comprised 672 consecutive routine fecal specimens collected from 616 individuals...
February 13, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29437541/molecular-characterization-of-extended-spectrum-beta-lactamase-and-carbapenemase-producing-pseudomonas-aeruginosa-strains-from-a-malaysian-tertiary-hospital
#11
Hannah Y P Phoon, Hazilawati Hussin, Baizurah M Hussain, Kwai Lin Thong
Pseudomonas aeruginosa infections account for high morbidity and mortality rates worldwide. Increasing resistance toward β-lactams, especially carbapenems, poses a serious therapeutic challenge. However, the multilocus sequence typing (MLST) of extended-spectrum beta lactamase (ESBL)- and carbapenemase-producing clinical P. aeruginosa has not been reported in Malaysia. This study aimed to determine the antibiotic susceptibility profiles, resistance genes, pulsotypes, and sequence types (STs) of clinical P...
February 13, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29437306/clinical-predictors-of-ceftriaxone-resistance-in-microorganisms-causing-febrile-urinary-tract-infections-in-men
#12
Javier Ramos Lázaro, Alex Smithson, Neus Jovè Vidal, María Teresa Batida Vila
OBJECTIVES: Because of high rates of resistance to fluoroquinolones, ceftriaxone has become one of the main options for treating febrile urinary tract infection (FUTI). This study aimed to identify predictors of ceftriaxone resistance in community-acquired FUTIs in men. MATERIAL AND METHODS: Cross-sectional ambispective study enrolling men with FUTIs treated in the emergency department of a local area hospital in Spain. RESULTS: A total of 552 FUTI episodes were studied; 103 (18...
February 2018: Emergencias: revista de la Sociedad Española de Medicina de Emergencias
https://www.readbyqxmd.com/read/29436593/l%C3%A2-histidine-augments-the-oxidative-damage-against-gram%C3%A2-negative-bacteria-by-hydrogen-peroxide
#13
Tamiko Nagao, Haruyuki Nakayama-Imaohji, Miad Elahi, Ayano Tada, Emika Toyonaga, Hisashi Yamasaki, Katsuichiro Okazaki, Hirokazu Miyoshi, Koichiro Tsuchiya, Tomomi Kuwahara
Excessive damage to DNA and lipid membranes by reactive oxygen species reduces the viability of bacteria. In the present study, the proliferation of recA‑deficient Escherichia coli strains was revealed to be inhibited by 1% L‑histidine under aerobic conditions. This inhibition of proliferation was not observed under anaerobic conditions, indicating that L‑histidine enhances oxidative DNA damage to E. coli cells. Reverse transcription‑quantitative polymerase chain reaction analysis demonstrated that the expression of recA in E...
February 7, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29434938/genetic-characterization-and-in-vitro-activity-of-antimicrobial-combinations-of-multidrug-resistant-acinetobacter-baumannii-from-a-general-hospital-in-china
#14
Fang Chen, Ling Wang, Min Wang, Yixin Xie, Xiaomeng Xia, Xianping Li, Yanhua Liu, Wei Cao, Tingting Zhang, Pengling Li, Min Yang
The present study aimed to develop a rational therapy based on the genetic epidemiology, molecular mechanism evaluation and in vitro antibiotic combinations activity in multidrug-resistant Acinetobacter baumannii (MDRAB). MDRAB was screened by the Kirby-Bauer method. The random amplified polymorphic DNA technique was used to establish genetic fingerprinting, and a series of resistance genes were detected by polymerase chain reaction. Antimicrobial agents including amikacin (AK), cefoperazone/sulbactam (SCF I/II), meropenem (MEM), minocycline (MINO) and ciprofloxacin (CIP) were used to determine the minimum inhibitory concentrations (MICs) and interactions between antibiotics by the broth microdilution method and chequerboard assays...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434581/site-specific-recombination-at-xerc-d-sites-mediates-the-formation-and-resolution-of-plasmid-co-integrates-carrying-a-blaoxa-58-and-tnapha6-resistance-module-in-acinetobacter-baumannii
#15
María M Cameranesi, Jorgelina Morán-Barrio, Adriana S Limansky, Guillermo D Repizo, Alejandro M Viale
Members of the genus Acinetobacter possess distinct plasmid types which provide effective platforms for the acquisition, evolution, and dissemination of antimicrobial resistance structures. Many plasmid-borne resistance structures are bordered by short DNA sequences providing potential recognition sites for the host XerC and XerD site-specific tyrosine recombinases (XerC/D-like sites). However, whether these sites are active in recombination and how they assist the mobilization of associated resistance structures is still poorly understood...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29434398/a-highly-promiscuous-integron-plasmids-extended-spectrum-beta-lactamases-and-efflux-pumps-as-factors-governing-multidrug-resistance-in-a-highly-drug-resistant-vibrio-fluvialis-isolate-bd146-from-kolkata-india
#16
Neha Rajpara, Mrinalini Nair, Ashima Kushwaha Bhardwaj
In an earlier study from this laboratory, Vibrio fluvialis BD146, a clinical isolate from Kolkata, India, 2002, was found to be resistant to all the fourteen antibiotics tested. It harboured a high copy number plasmid pBD146 and a low copy number plasmid. In the present study, a more detailed analysis was carried out to unravel different resistance mechanisms in this isolate. Sequencing showed that variable region of class 1 integron located on low copy number plasmid harbored arr3-cmlA-blaOXA10-aadA1 gene cassettes...
March 2018: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29434117/prevalence-and-characteristics-of-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-in-domestic-and-imported-chicken-meats-in-japan
#17
Azimun Nahar, Sharda Prasad Awasthi, Noritoshi Hatanaka, Kentaro Okuno, Phuong Hoai Hoang, Jayedul Hassan, Atsushi Hinenoya, Shinji Yamasaki
The purpose of this study was to investigate the prevalence of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (ESBL-Ec) in retail chicken meats in Japan. Fifty-six domestic and 50 imported (Brazil, n=36; United States, n=8; Thailand, n=6) chicken meat samples were analyzed. The 162 ESBL-Ec included 111 from 43 (77%) domestic samples and 51 from 26 (52%) Brazilian samples. Fifty-three and 30 of 111 and 51 ESBL-Ec from domestic and Brazilian chickens, respectively, were selected for ESBL genotyping...
February 12, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29433694/antibioth%C3%A3-rapie-des-infections-n%C3%A3-onatales-bact%C3%A3-riennes-pr%C3%A3-coces-chez-les-nouveau-n%C3%A3-s-n%C3%A3-s-%C3%A3-partir-de-34-semaines-d%C3%A2-am%C3%A3-norrh%C3%A3-e
#18
O Romain
All newborns superior to 34 weeks of gestationnal age (GA) are concerned by these guidelines of the French Society of Neonatology and the French Society of Pediatrics. Only newborns at risk of Early-Onset Neonatal Bacterial Infection who are clinically symptomatic have to be treated with probabilistic antibiotherapy treatment. The antibiotic combination of choice is amoxicillin + gentamicin. The two exceptions that justify dual therapy with Cefotaxime and Gentamicin are the bacteriological documentation of Escherichia coli and/or the presence of clinical signs of severity...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29433582/the-frequency-of-klebsiella-pneumonia-encoding-genes-for-ctx-m-tem-1-and-shv-1-extended-spectrum-beta-lactamases-enzymes-isolated-from-urinary-tract-infection
#19
Masomeh Dehshiri, Seyed Sajjad Khoramrooz, Mohammad Zoladl, Seyed Abdolmajid Khosravani, Najmeh Parhizgari, Mohammad Hossein Motazedian, Soheyla Jahedi, Asghar Sharifi
BACKGROUND: The extended- spectrum β-lactamase producing bacteria are widely spread worldwide. The productions of these enzymes cause bacterial resistance to a wide range of antibiotics. The aim of this study was to investigated the frequency of K. pneumonia encoding genes for CTX-M, TEM-1 and SHV-1 extended-spectrum beta lactamases enzymes isolated from urinary tract infection. METHODS: This study is cross-sectional study. All K. pneumonia isolates from urine samples, which had grown on media culture more than 105 were delivered to the medical microbiology laboratory...
February 13, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29432938/first-report-on-antimicrobial-resistance-and-molecular-characterization-of-salmonella-enterica-serotype-typhi-isolated-from-human-specimens-in-luanda-angola
#20
Moisés Francisco, Sofia Santos Costa, Adriana Belas, Jorge Ramos, Isabel Couto, Constança Pomba, Miguel Viveiros
OBJECTIVES: Typhoid fever is a common infection in Africa and in spite of scarce surveillance reports, its incidence is commonly considered high by the Angolan Health system. Drug-resistant Salmonella enterica serotype Typhi has emerged, turning antimicrobial susceptibility testing essential to provide clinical guidance. This is the first report analyzing antimicrobial resistance patterns and population structure of the few S. enterica ser. Typhi isolated from patients with Typhoid fever in Luanda, Angola...
February 9, 2018: Journal of Global Antimicrobial Resistance
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