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https://www.readbyqxmd.com/read/28198105/antibiotic-dependent-perturbations-of-extended-spectrum-beta-lactamase-producing-klebsiella-pneumoniae-proteome
#1
Moo-Jin Suh, Sarah L Keasey, Ernst E Brueggemann, Robert G Ulrich
Extended spectrum beta-lactamase producing Klebsiella pneumoniae (ESBL-KP) causes life-threatening infections in susceptible and immuno-compromised individuals. Because of the emergence of multidrug resistance and tolerance, it is crucial to better understand the mechanisms by which ESBL-KP can adapt to antibiotic stress. The aim of this study was to provide an overview of the global proteome changes occurring in ESBL-KP in response to sub-lethal concentrations of the antibiotics doxycycline (DC, bacteriostatic) and streptomycin (SM, bactericidal), which both impair ribosomal synthesis of bacterial proteins...
February 15, 2017: Proteomics
https://www.readbyqxmd.com/read/28196696/patients-hospitalized-abroad-as-importers-of-multiresistant-bacteria-a-cross-sectional-study
#2
Tamim Khawaja, Juha Kirveskari, Sara Johansson, Juuso Väisänen, Aurora Djupsjöbacka, Annika Nevalainen, Anu Kantele
OBJECTIVES: The pandemic spread of multidrug-resistant (MDR) bacteria poses a threat to healthcare worldwide, with highest prevalence in indigent regions of the (sub)tropics. As hospitalization constitutes a major risk factor for colonization, infection control management in low-prevalence countries urgently needs background data on patients hospitalized abroad. METHODS: We collected data on 1122 patients who, after hospitalization abroad, were treated at the Helsinki University Hospital between 2010 and 2013...
February 11, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28193648/pharmacodynamics-of-finafloxacin-ciprofloxacin-and-levofloxacin-in-serum-and-urine-against-tem-and-shv-type-extended-spectrum-beta-lactamase-producing-enterobacteriaceae-isolated-from-patients-with-urinary-tract-infections
#3
A Dalhoff, S Schubert, A Vente
Background: Pharmacodynamics of finafloxacin, ciprofloxacin and levofloxacin against ESBL-producing Enterobacteriaceae were compared. As quinolones loose activity in acidic media and in particular in urine, their activities were tested in parallel under conventional conditions and in acidic artificial urine.Methods: TEM- and SHV-type ESBL-producing E. coli and K. pneumoniae and their wild-type counterparts were exposed in a modified Grasso model to serum- and urine-concentrations following oral doses of finafloxacin 800mg qd, immediate- release ciprofloxacin 500mg bid, extended release ciprofloxacin-XR 1000mg qd, levofloxacin 500mg qd, or levofloxacin 750mg qd...
February 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28167307/fosfomycin-in-vitro-efficacy-against-multidrug-resistant-isolates-beyond-urinary-isolates
#4
Tulin Demir, Tuncay Buyukguclu
OBJECTIVES: Fosfomycin (FOF) is a bactericidal antimicrobial agent active against a range of Gram-negative bacteria, including multidrug-resistant (MDR) and metallo-β-lactamase (MBL)-producing Enterobacteriaceae. However, data are scarce regarding use of the drug beyond urinary tract infections (UTIs). METHODS: In this study, susceptibility rates to FOF among 290 MDR Enterobacteriaceae isolates were analysed by gradient and disk diffusion tests and the results were compared with agar dilution according to the Clinical and Laboratory Standards Institute (CLSI)...
February 3, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28165890/enterobacteriaceae-harboring-ampc-blacmy-and-esbl-blactx-m-in-migratory-and-nonmigratory-wild-songbird-populations-on-ohio-dairies
#5
Dimitria A Mathys, Blake A Mathys, Dixie F Mollenkopf, Joshua B Daniels, Thomas E Wittum
Extended-spectrum β-lactamases (ESBLs) confer bacterial resistance to critically important antimicrobials, including extended-spectrum cephalosporins (ESCs). Livestock are important reservoirs for the zoonotic food-borne transmission of ESC-resistant enteric bacteria. Our aim is to describe the potential role of migratory and resident wild birds in the epidemiology of ESBL-mediated bacterial resistance on dairy farms. Using mist nets, we sampled wild migratory and resident birds either immediately adjacent to or 600 ft away from free-stall barns on three Ohio dairy farms during the 2014 and 2015 spring migrations...
February 6, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28154560/detection-of-sgi1-pgi1-elements-and-resistance-to-extended-spectrum-cephalosporins-in-proteae-of-animal-origin-in-france
#6
Eliette Schultz, Axel Cloeckaert, Benoît Doublet, Jean-Yves Madec, Marisa Haenni
Proteae, and especially Proteus mirabilis, are often the cause of urinary tract infections (UTIs) in humans. They were reported as carriers of extended-spectrum β-lactamase (ESBL) genes, and recently of carbapenemases, mostly carried by the Salmonella genomic island 1 (SGI1) and Proteus genomic island 1 (PGI1). Proteae have also lately become an increasing cause of UTIs in companion animals, but antimicrobial susceptibility data in animals are still scarce. Here, we report the characterization of 468 clinical epidemiologically unrelated Proteae strains from animals collected between 2013 and 2015 in France...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28148226/trends-in-antimicrobial-resistance-and-empiric-antibiotic-therapy-of-bloodstream-infections-at-a-general-hospital-in-mid-norway-a-prospective-observational-study
#7
Arne Mehl, Bjørn Olav Åsvold, Angela Kümmel, Stian Lydersen, Julie Paulsen, Ingvild Haugan, Erik Solligård, Jan Kristian Damås, Stig Harthug, Tom-Harald Edna
BACKGROUND: The occurrence of bloodstream infection (BSI) and antimicrobial resistance have been increasing in many countries. We studied trends in antimicrobial resistance and empiric antibiotic therapy at a medium-sized general hospital in Mid-Norway. METHODS: Between 2002 and 2013, 1995 prospectively recorded episodes of BSI in 1719 patients aged 16-99 years were included. We analyzed the antimicrobial non-susceptibility according to place of acquisition, site of infection, microbe group, and time period...
February 2, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28146187/-factors-associated-with-extended-spectrum-betalactamases-producing-organisms-among-patients-with-urinary-tract-infections-a-prospective-cohort-study
#8
Cristián Avilés, Pablo Betancour, Carmen Luz Velasco, Rodrigo Godoy, Elizabeth Barthel, Felipe Martínez
BACKGROUND: Urinary tract infections (UTIs) caused by extended-spectrum betalactamases (ESBL) are an increasingly common problem. AIM: To develop an association model to allow an early detection of ESBL-producing microorganisms. METHODS: A prospective observational cohort study was undertaken among patients admitted with a diagnosis of culture-proven UTI to the Internal Medicine Ward of the Hospital Naval Almirante Nef between February and November, 2011...
December 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28143782/esbl-ampc-and-carbapenemase-producing-enterobacteriaceae-in-animals-a-threat-for-humans
#9
REVIEW
Jean-Yves Madec, Marisa Haenni, Patrice Nordmann, Laurent Poirel
There has been a great and long-term concern that ESBL/AmpC- and carbapenemase-producing Enterobacteriaceae occurring in animals may constitute a public health issue. A large number of factors with complex interrelations contribute to the spread of those bacteria among animals and humans. ESBL/AmpC- or carbapenemase-encoding genes are most often located onto mobile genetic elements favouring their dissemination. Some shared reservoirs of ESBL/AmpC or carbapenemase genes, plasmids or clones have been identified and suggest cross-transmissions...
January 28, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28138376/survey-of-ctx-m-gene-frequency-in-extended-spectrum-beta-lactamase-producing-enterobacteriaceae-isolates-using-the-combination-disk-and-pcr-methods-in-ahvaz-iran
#10
Mojtaba Moosavian, Nazanin Ahmadkhosravy
BACKGROUND: A common mechanism of resistance to beta-lactam antibiotics is the production of beta-lactamase by Gram-negative bacteria. Recently, nonderivative extended-spectrum beta-lactamases (ESBLs) from the TEM and SHV enzymes, such as CTX-M, that were related to different geographical regions have been recognized. OBJECTIVES: The aim of this study was to determine the frequency of the CTX-M gene in ESBL-producing Enterobacteriaceae isolates in hospitalized patients in the teaching hospitals of Ahvaz, Iran...
November 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/28137941/pharmacodynamics-of-ceftazidime-avibactam-against-extracellular-and-intracellular-forms-of-pseudomonas-aeruginosa
#11
J M Buyck, C Luyckx, G G Muccioli, K M Krause, W W Nichols, P M Tulkens, F Van Bambeke
OBJECTIVES: When tested in broth, avibactam reverses ceftazidime resistance in many Pseudomonas aeruginosa that express ESBLs. We examined whether similar reversal is observed against intracellular forms of P. aeruginosa METHODS: Strains: reference strains; two engineered strains with basal non-inducible expression of AmpC and their isogenic mutants with stably derepressed AmpC; and clinical isolates with complete, partial or no resistance to reversion with avibactam. Pharmacodynamic model: 24 h concentration-response to ceftazidime [0...
January 30, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28131671/comparison-of-two-rapid-biochemical-tests-and-four-chromogenic-selective-media-for-detection-of-carbapenemase-producing-gram-negative-bacteria
#12
Vladimira Hinić, Ivo Amrein, Sabrina Stammler, Judith Heckendorn, Dominik Meinel, Reno Frei, Adrian Egli
We evaluated RAPIDEC® CARBA NP, Neo-Rapid CARB, chromID® CARBA SMART (CARB/OXA), Brilliance™ CRE/ESBL, ChromArt CRE and BBL™ CHROMagar™ CPE for the detection of carbapenemase-producing bacteria. The analytical sensitivity of RAPIDEC® CARBA NP was better than that of Neo-Rapid CARB. A combination of carbapenemase and ESBL screening plates could be advantageous.
January 25, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28131557/-profile-of-bacterial-resistance-in-pediatric-urinary-tract-infections-in-2014
#13
A Flammang, R Morello, M Vergnaud, J Brouard, P Eckart
In pediatric units, bacteria-producing extended-spectrum-betalactamase (ESBL) have an increasing prevalence among bacteria causing febrile urinary tract infections (UTIs). The purpose of this study was to evaluate the epidemiology of bacteria resistance patterns observed in UTIs, in order to assess the current antibiotic treatment protocols. This study is based upon a single-center retrospective chart review of the cytobacteriological urine cultures performed in UTIs between 1 January and 31 December 2014, in the medical pediatric unit of the Caen University Hospital...
January 25, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28115333/clinical-efficacy-of-%C3%AE-lactam-%C3%AE-lactamase-inhibitor-combinations-for-the-treatment-of-bloodstream-infection-due-to-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-in-haematological-patients-with-neutropaenia-a-study-protocol-for-a-retrospective-observational
#14
C Gudiol, C Royo-Cebrecos, C Tebe, E Abdala, M Akova, R Álvarez, G Maestro-de la Calle, A Cano, C Cervera, W T Clemente, P Martín-Dávila, A Freifeld, L Gómez, T Gottlieb, M Gurguí, F Herrera, A Manzur, G Maschmeyer, Y Meije, M Montejo, M Peghin, J Rodríguez-Baño, I Ruiz-Camps, T C Sukiennik, J Carratalà
INTRODUCTION: Bloodstream infection (BSI) due to extended-spectrum β-lactamase-producing Gram-negative bacilli (ESBL-GNB) is increasing at an alarming pace worldwide. Although β-lactam/β-lactamase inhibitor (BLBLI) combinations have been suggested as an alternative to carbapenems for the treatment of BSI due to these resistant organisms in the general population, their usefulness for the treatment of BSI due to ESBL-GNB in haematological patients with neutropaenia is yet to be elucidated...
January 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28110781/carriage-of-antimicrobial-resistant-escherichia-coli-in-dogs-prevalence-associated-risk-factors-and-molecular-characteristics
#15
Amy L Wedley, Susan Dawson, Thomas W Maddox, Karen P Coyne, Gina L Pinchbeck, Peter Clegg, Tim Nuttall, Miranda Kirchner, Nicola J Williams
Resistance to antimicrobials, in particular that mediated by extended spectrum β-lactamases (ESBL) and AmpC β-lactamases are frequently reported in bacteria causing canine disease as well as in commensal bacteria, which could be a potential health risk for humans they come into contact with. This cross-sectional study aimed to estimate the prevalence and investigate the molecular characteristics of ESBL and plasmid encoded AmpC (pAmpC)-producing E. coli in the mainland UK vet-visiting canine population and, using responses from detailed questionnaires identify factors associated with their carriage...
February 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28101682/synthesis-spectral-and-extended-spectrum-beta-lactamase-studies-of-transition-metal-tetraaza-macrocyclic-complexes
#16
Dinesh Kumar, Nutan Sharma, Manjula Nair
Urinary tract infections commonly occur in humans due to microbial pathogens invading the urinary tract, which can bring about a range of clinical symptoms and potentially fatal sequelae. The present study is aimed at addressing the development of a new antimicrobial agent against extended spectrum beta lactamase (ESBL) producing E. coli bacteria. We have synthesised some biologically potent (NNNN) donor macrocycles (L 1  = dibenzo[f,n]dipyrido[3,4-b:4',3'-j][1,4,9,12]tetraazacyclohexadecine-6,11,18,23(5H,12H, 7H, 24H)-tetraone, and L 2  = 6,12,19,25-tetraoxo-4,6,11,12,16,18,23,24-octahydrotetrabenzo [b,g,k,p][1,5,10,14]tetra azacyclooctadecine-2,13-dicarboxylic acid) and their Ti and Zr metal complexes in alcoholic media using microwave protocol...
January 18, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28099062/rectal-carriage-of-extended-spectrum-beta-lactamase-and-carbapenemase-producing-gram-negative-bacilli-in-intensive-care-units-in-tunisia
#17
Samia Hammami, Chaima Dahdeh, Kelthoum Mamlouk, Sana Ferjeni, Elaa Maamar, Zeineb Hamzaoui, Mabrouka Saidani, Salma Ghedira, Mohamed Houissa, Amin Slim, Ilhem Boutiba-Ben Boubaker
This study was conducted to evaluate the rate of fecal carriage of Gram-negative bacilli (GNB) resistant to third-generation cephalosporins (third GC) in patients hospitalized in the intensive care unit (ICU) of Charles Nicolle Hospital of Tunis and to identify the enzymatic mechanisms involved. From February to April 2014, rectal swabs were collected from all patients (n = 38) at admission and once weekly thereafter to identify acquisition. They were cultured on desoxycholate-lactose-agar plates supplemented with cefotaxime (2 mg/L)...
January 18, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28096978/carriage-of-antibiotic-resistant-enterobacteriaceae-in-hospitalised-children-in-tertiary-hospitals-in-harare-zimbabwe
#18
Marcelyn T Magwenzi, Muchaneta Gudza-Mugabe, Hilda A Mujuru, Mutsa Dangarembizi-Bwakura, Valerie Robertson, Alexander M Aiken
BACKGROUND: Extended-spectrum β-lactamase-producing and gentamicin resistant Enterobacteriaceae are increasingly recognised as a major cause of infection in low-income countries. We assessed the prevalence of gastrointestinal carriage of these bacteria in hospitalised children in Harare, Zimbabwe. METHODS: We conducted a cohort study in paediatric inpatients at two tertiary-referral hospitals between May and July 2015. Rectal swabs and faecal samples were collected within 24 h of admission and further follow-up samples were collected on alternate days during hospitalization...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28087584/emergence-of-klebsiella-variicola-positive-for-ndm-9-a-variant-of-new-delhi-metallo-%C3%AE-lactamase-in-an-urban-river-in-south-korea
#19
Doris Y W Di, Jeonghwan Jang, Tatsuya Unno, Hor-Gil Hur
OBJECTIVES: To examine the presence of pathogenic bacteria carrying New Delhi metallo-β-lactamase in the environment and to characterize the genome structures of these strains. METHODS: Phenotypic screening of antimicrobial susceptibility and WGS were conducted on three Klebsiella variicola strains possessing NDM-9 isolated from an urban river. RESULTS: Three carbapenem-resistant K. variicola isolated from Gwangju tributary were found to possess blaNDM-9 genes...
January 12, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28078492/first-report-of-bla-ctx-m-15-type-esbl-producing-klebsiella-pneumoniae-in-wild-migratory-birds-in-pakistan
#20
Shahbaz Raza, Mashkoor Mohsin, Waqas Ahmed Madni, Fatima Sarwar, Muhammad Saqib, Bilal Aslam
We investigated wild migratory birds faecal swabs for extended-spectrum β-lactamases-producing Klebsiella pneumoniae (ESBL-K. pneumoniae) from wetland habitats in Pakistan. ESBL-K. pneumoniae were analysed for MDR phenotype, ESBL genotype and genetic diversity. A total of 13 (8.6%) ESBL-K. pneumoniae were recovered. Of these, 8 (61%) isolates were MDR. DNA sequencing confirmed bla CTX-M-15 as the dominant ESBL genotype. BOX-PCR fingerprints showed most of the isolates are unrelated. This study is the first to report the wildlife contamination of CTX-M-15-producing K...
January 11, 2017: EcoHealth
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