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Journal of Antimicrobial Chemotherapy

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https://www.readbyqxmd.com/read/28093485/molecular-insights-into-fosfomycin-resistance-in-escherichia-coli
#1
M Ballestero-Téllez, F Docobo-Pérez, I Portillo-Calderón, J M Rodríguez-Martínez, L Racero, M S Ramos-Guelfo, J Blázquez, J Rodríguez-Baño, A Pascual
OBJECTIVES: Fosfomycin activity in Escherichia coli depends on several genes of unknown importance for fosfomycin resistance. The objective was to characterize the role of uhpT, glpT, cyaA and ptsI genes in fosfomycin resistance in E. coli. METHODS: WT E. coli BW25113 and null mutants, ΔuhpT, ΔglpT, ΔcyaA, ΔptsI, ΔglpT-uhpT, ΔglpT-cyaA, ΔglpT-ptsI, ΔuhpT-cyaA, ΔuhpT-ptsI and ΔptsI-cyaA, were studied. Susceptibility to fosfomycin was tested using CLSI guidelines...
January 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28093484/mic-of-amoxicillin-clavulanate-according-to-clsi-and-eucast-discrepancies-and-clinical-impact-in-patients-with-bloodstream-infections-due-to-enterobacteriaceae
#2
Mercedes Delgado-Valverde, Adoración Valiente-Mendez, Eva Torres, Benito Almirante, Silvia Gómez-Zorrilla, Nuria Borrell, Ana Isabel Aller-García, Mercedes Gurgui, Manel Almela, Mercedes Sanz, Germán Bou, Luis Martínez-Martínez, Rafael Cantón, Jose Antonio Lepe, Manuel Causse, Belén Gutiérrez-Gutiérrez, Álvaro Pascual, Jesús Rodríguez-Baño
OBJECTIVES: To compare results of amoxicillin/clavulanate susceptibility testing using CLSI and EUCAST methodologies and to evaluate their impact on outcome in patients with bacteraemia caused by Enterobacteriaceae. PATIENTS AND METHODS: A prospective observational cohort study was conducted in 13 Spanish hospitals. Patients with bacteraemia due to Enterobacteriaceae who received empirical intravenous amoxicillin/clavulanate treatment for at least 48 h were included...
January 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28093483/treatment-simplification-to-atazanavir-ritonavir%C3%A2-%C3%A2-lamivudine-versus-maintenance-of-atazanavir-ritonavir%C3%A2-%C3%A2-two-nrtis-in-virologically-suppressed-hiv-1-infected-patients-48-week-results-from-a-randomized-trial-atlas-m
#3
Simona Di Giambenedetto, Massimiliano Fabbiani, Eugenia Quiros Roldan, Alessandra Latini, Gabriella D'Ettorre, Andrea Antinori, Antonella Castagna, Giancarlo Orofino, Daniela Francisci, Pierangelo Chinello, Giordano Madeddu, Pierfrancesco Grima, Stefano Rusconi, Massimo Di Pietro, Annalisa Mondi, Nicoletta Ciccarelli, Alberto Borghetti, Emanuele Focà, Manuela Colafigli, Andrea De Luca, Roberto Cauda
BACKGROUND: Combination ART (cART)-related toxicities and costs have prompted the need for treatment simplification. The ATLAS-M trial explored 48 week non-inferior efficacy of simplification to atazanavir/ritonavir  +  lamivudine versus maintaining three-drug atazanavir/ritonavir-based cART in virologically suppressed patients. METHODS: We performed an open-label, multicentre, randomized, non-inferiority study, enrolling HIV-infected adults on atazanavir/ritonavir + two NRTIs, with stable HIV-RNA <50 copies/mL and CD4 + >200 cells/mm(3) Main exclusion criteria were hepatitis B virus coinfection, past virological failure on or resistance to study drugs, recent AIDS and pregnancy...
January 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28093482/dissemination-of-blaoxa-58-in-proteus-mirabilis-isolates-from-germany
#4
Felix Lange, Niels Pfennigwerth, Sonja Gerigk, Frank Gohlke, Klaus Oberdorfer, Ingvill Purr, Nikolaus Wohanka, Andreas Roggenkamp, Sören G Gatermann, Martin Kaase
OBJECTIVES: Characterization of Proteus mirabilis isolates harbouring blaOXA-58 with emphasis on the genetic environment of this resistance determinant. METHODS: Strains of P. mirabilis (n = 37) isolated from different patients were tested for the presence of blaOXA-58 The genetic context of blaOXA-58 was determined by WGS of two strains and Sanger sequencing. Clonality of the strains was assessed by PFGE. Susceptibility testing was performed by microdilution according to EUCAST...
January 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088770/a-novel-disrupted-mcr-1-gene-and-a-lysogenized-phage-p1-like-sequence-detected-from-a-large-conjugative-plasmid-cultured-from-a-human-atypical-enteropathogenic-escherichia-coli-aepec-recovered-in-china
#5
LETTER
Li Bai, Juan Wang, Daniel Hurley, Zhongyi Yu, Lili Wang, Qian Chen, Juan Li, Fengqin Li, Séamus Fanning
No abstract text is available yet for this article.
January 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088769/ultradeep-sequencing-detection-of-the-r263k-integrase-inhibitor-drug-resistance-mutation
#6
LETTER
Jérémy Jaffré, Daniele Armenia, Maria Concetta Bellocchi, Marc Wirden, Luca Carioti, Sidonie Lambert, Marc-Antoine Valantin, Thuy Nguyen, Anne Simon, Christine Katlama, Massimo Andreoni, Carlo Federico Perno, Vincent Calvez, Francesca Ceccherini-Silberstein, Anne-Geneviève Marcelin, Eve Todesco
No abstract text is available yet for this article.
January 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088768/in-vitro-activity-of-ceftazidime-avibactam-against-urinary-isolates-from-patients-in-a-phase-3-clinical-trial-programme-for-the-treatment-of-complicated-urinary-tract-infections
#7
Gregory G Stone, Patricia A Bradford, Katrina Yates, Paul Newell
OBJECTIVES: To evaluate the in vitro activity of ceftazidime/avibactam relative to comparator agents against Gram-negative isolates from a Phase 3 clinical trial programme for complicated urinary tract infections (RECAPTURE). METHODS: The in vitro activity of ceftazidime/avibactam was evaluated against 840 Gram-negative pathogens isolated at baseline from 1033 randomized patients in two pivotal Phase 3 clinical trials for the treatment of complicated urinary tract infections...
January 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088767/pharmacokinetic-study-of-anidulafungin-in-icu-patients-with-intra-abdominal-candidiasis
#8
H Dupont, L Massias, B Jung, N Ammenouche, P Montravers
BACKGROUND: Only limited pharmacokinetic data are available for anidulafungin in ICU patients, especially in patients treated for severe intra-abdominal infection (IAI). METHODS: This was a prospective multicentre observational study in ICU patients with suspected yeast IAI. All patients received an intravenous loading dose of 200 mg of anidulafungin, followed by 100 mg/day. Thirteen blood samples were drawn between day 1 and day 5 for pharmacokinetic analysis...
January 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088766/staphylococcus-aureus-cc395-harbours-a-novel-composite-staphylococcal-cassette-chromosome-mec-element
#9
Jesper Larsen, Paal S Andersen, Volker Winstel, Andreas Peschel
BACKGROUND: CoNS species are likely reservoirs of the staphylococcal cassette chromosome mec (SCCmec) in Staphylococcus aureus S aureus CC395 is unique as it is capable of exchanging DNA with CoNS via bacteriophages, which are also known to mediate transfer of SCCmec OBJECTIVES: To analyse the structure and putative origin of the SCCmec element in S aureus CC395. METHODS: The only MRSA CC395 strain described in the literature, JS395, was subjected to WGS, and its SCCmec element was compared with those found in CoNS species and other S...
January 14, 2017: Journal of Antimicrobial Chemotherapy
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
#10
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/28082360/comment-on-pneumocystis-jirovecii-pneumonia-still-a-concern-in-patients-with-haematological-malignancies-and-stem-cell-transplant-recipients
#11
Spinello Antinori, Francesca Binda, Lorena van den Bogaart, Roberto Rech, Antonio Castelli, Massimo Galli, Laura Milazzo, Mario Corbellino, Anna Lisa Ridolfo
No abstract text is available yet for this article.
January 12, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28077674/population-structure-of-japanese-extraintestinal-pathogenic-escherichia-coli-and-its-relationship-with-antimicrobial-resistance
#12
Yasufumi Matsumura, Taro Noguchi, Michio Tanaka, Toru Kanahashi, Masaki Yamamoto, Miki Nagao, Shunji Takakura, Satoshi Ichiyama
OBJECTIVES: To define the population structure of extraintestinal pathogenic Escherichia coli (ExPEC) in Japan and its relationship with antimicrobial resistance and the major resistance mechanisms for fluoroquinolones and β-lactams, we designed a multicentre prospective study. METHODS: A total of 329 ExPEC isolates were collected at 10 Japanese acute-care hospitals during December 2014. We defined the clonal groups of ExPEC by fumC and fimH sequencing (CH typing)...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28077673/outpatient-parenteral-antibiotic-therapy-opat-in-asia-missing-an-opportunity
#13
Dale Fisher, Jessica Michaels, Ryota Hase, Jing Zhang, Sushila Kataria, Benedict Sim, Joseph Kay-Yan Tsang, James Pollard, Monica Chan, Subramanian Swaminathan
OBJECTIVES: Healthcare facilities internationally have grown outpatient parenteral antibiotic administration services for the last few decades. The literature contains publications from dozens of countries describing systematized processes with specialist oversight and their levels of service provision and outcomes. Such descriptions are absent in the majority of Asian countries. We sought to elucidate the extent and nature of outpatient parenteral antibiotic therapy (OPAT) in Asia and to consider the ramifications and opportunities for improvement METHODS: Utilizing colleagues and their personal networks, we surveyed healthcare facilities across 17 countries in Asia to ascertain the current means (if any) of providing OPAT...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28077672/potentiation-of-ceftazidime-by-avibactam-against-%C3%AE-lactam-resistant-pseudomonas-aeruginosa-in-an-in-vitro-infection-model
#14
Sherwin K B Sy, Luning Zhuang, Marie-Eve Beaudoin, Philipp Kircher, Maria A M Tabosa, Noely C T Cavalcanti, Christian Grunwitz, Sebastian Pieper, Virna J Schuck, Wright W Nichols, Hartmut Derendorf
OBJECTIVES: This study evaluated the in vitro pharmacodynamics of combinations of ceftazidime and the non-β-lactam β-lactamase inhibitor, avibactam, against ceftazidime-, piperacillin/tazobactam- and meropenem-multiresistant Pseudomonas aeruginosa by a quantitative time-kill method. METHODS: MICs of ceftazidime plus 0-16 mg/L avibactam were determined against eight isolates of P. aeruginosa Single-compartment, 24 h time-kill kinetics were investigated for three isolates at 0-16 mg/L avibactam with ceftazidime at 0...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28077671/impact-of-long-term-care-facility-residence-on-the-antibiotic-resistance-of-urinary-tract-escherichia-coli-and-klebsiella
#15
Alicia Rosello, Andrew C Hayward, Susan Hopkins, Carolyne Horner, Dean Ironmonger, Peter M Hawkey, Sarah R Deeny
BACKGROUND: Long-term care facilities (LTCFs) are thought to be important reservoirs of antimicrobial-resistant (AMR) bacteria; however, there is no routine surveillance of resistance in LTCF residents, or large population-based studies comparing AMR in LTCFs with the community, so the relative burden of AMR in LTCFs remains unknown. OBJECTIVES: To compare the frequency of antibiotic resistance of urinary tract bacteria from residents of LTCFs for the elderly and adults aged 70 years or older living in the community...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28073970/estimated-generic-prices-for-novel-treatments-for-drug-resistant-tuberculosis
#16
Dzintars Gotham, Joseph Fortunak, Anton Pozniak, Saye Khoo, Graham Cooke, Frederick E Nytko, Andrew Hill
BACKGROUND: The estimated worldwide annual incidence of MDR-TB is 480 000, representing 5% of TB incidence, but 20% of mortality. Multiple drugs have recently been developed or repurposed for the treatment of MDR-TB. Currently, treatment for MDR-TB costs thousands of dollars per course. OBJECTIVES: To estimate generic prices for novel TB drugs that would be achievable given large-scale competitive manufacture. METHODS: Prices for linezolid, moxifloxacin and clofazimine were estimated based on per-kilogram prices of the active pharmaceutical ingredient (API)...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28073969/characterization-of-carbapenemase-producing-enterobacteriaceae-in-the-west-midlands-region-of-england-2007-14
#17
Jacqueline Findlay, Katie L Hopkins, Adela Alvarez-Buylla, Daniéle Meunier, Nazim Mustafa, Robert Hill, Rachel Pike, Li-Xu McCrae, Peter M Hawkey, Neil Woodford
OBJECTIVES: Carbapenemase-producing Enterobacteriaceae (CPE) have been increasingly reported in the UK since 2003. We analysed patient and isolate data for CPE confirmed by the national reference laboratory from laboratories in the West Midlands region from November 2007 to December 2014. METHODS: MICs were determined by BSAC agar dilution methodology and isolates exhibiting resistance to one or more carbapenems were screened for carbapenemase genes by PCR. Plasmid analyses were performed after electro-transformation of carbapenemase-encoding plasmids...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28073968/variants-of-abgri3-carrying-the-arma-gene-in-extensively-antibiotic-resistant-acinetobacter-baumannii-from-singapore
#18
Grace A Blackwell, Kathryn E Holt, Stephen D Bentley, Li Yang Hsu, Ruth M Hall
OBJECTIVES: To investigate the context of the ribosomal RNA methyltransferase gene armA in carbapenem-resistant global clone 2 (GC2) Acinetobacter baumannii isolates from Singapore. METHODS: Antibiotic resistance was determined using disc diffusion; PCR was used to identify resistance genes. Whole genome sequences were determined and contigs were assembled and ordered using PCR. Resistance regions in unsequenced isolates were mapped. RESULTS: Fifteen GC2 A...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28073967/dna-replication-proteins-as-potential-targets-for-antimicrobials-in-drug-resistant-bacterial-pathogens
#19
REVIEW
Erika van Eijk, Bert Wittekoek, Ed J Kuijper, Wiep Klaas Smits
With the impending crisis of antimicrobial resistance, there is an urgent need to develop novel antimicrobials to combat difficult infections and MDR pathogenic microorganisms. DNA replication is essential for cell viability and is therefore an attractive target for antimicrobials. Although several antimicrobials targeting DNA replication proteins have been developed to date, gyrase/topoisomerase inhibitors are the only class widely used in the clinic. Given the numerous essential proteins in the bacterial replisome that may serve as a potential target for inhibitors and the relative paucity of suitable compounds, it is evident that antimicrobials targeting the replisome are underdeveloped so far...
January 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28073966/extended-stability-of-antimicrobial-agents-in-administration-devices
#20
Abi Jenkins, Tim Hills, Mark Santillo, Mark Gilchrist
BACKGROUND: Outpatient parenteral antimicrobial therapy (OPAT) is an established approach to patient care. A lack of data on antimicrobial stability within administration devices is a barrier to service expansion, and poses an antimicrobial stewardship dilemma. Often broad-spectrum, long half-life agents are used instead of narrow-spectrum agents, which need more frequent administration, but could possibly be used if stability data were available. OBJECTIVES: To complete a comprehensive literature review of published antimicrobial stability data, and assess these against a nationally recognized minimum dataset for medicines compounded into administration devices...
January 10, 2017: Journal of Antimicrobial Chemotherapy
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