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Theodore Gouliouris, Ben Warne, Edward J P Cartwright, Luke Bedford, Chathika K Weerasuriya, Kathy E Raven, Nick M Brown, M Estée Török, Direk Limmathurotsakul, Sharon J Peacock
Background: VRE bacteraemia has a high mortality and continues to defy control. Antibiotic risk factors for VRE bacteraemia have not been adequately defined. We aimed to determine the risk factors for VRE bacteraemia focusing on duration of antibiotic exposure. Methods: A retrospective matched nested case-control study was conducted amongst hospitalized patients at Cambridge University Hospitals NHS Foundation Trust (CUH) from 1 January 2006 to 31 December 2012...
March 13, 2018: Journal of Antimicrobial Chemotherapy
Farnaz Foolad, Brandie D Taylor, Samuel A Shelburne, Cesar A Arias, Samuel L Aitken
VRE are associated with ∼1300 deaths per year in the USA. Recent literature suggests that daptomycin, a cyclic lipopeptide antibiotic with concentration-dependent bactericidal activity, is the preferred treatment option for VRE bacteraemia, yet the optimal dosing strategy for this indication has not been established. In vitro evidence suggests that higher-than-labelled doses of daptomycin are required to optimally treat VRE bacteraemia and to inhibit the development of resistance. However, concern of dose-dependent toxicities, notably increases in creatine phosphokinase and the development of rhabdomyolysis, are a barrier to initiating high-dose schemes in clinical practice...
March 13, 2018: Journal of Antimicrobial Chemotherapy
Yamaan S Saadeh, Luis E Savastano, Julian L Gendreau, Aditya S Pandey
Optimal management of patients with stroke due to symptomatic carotid artery disease coexistent with bacterial endocarditis is still not well established. We report the case of a patient who presented with multifocal left middle cerebral artery stroke in the setting of Enterococcus faecalis endocarditis and was found to have near-occlusive ipsilateral carotid artery stenosis in stroke workup. Carotid artery endarterectomy was performed, and atheroma material demonstrated complicated plaque with cultures positive for E...
March 15, 2018: BMJ Case Reports
Shinichiro Morioka, Mika Ichikawa, Keita Mori, Hanako Kurai
BACKGROUND: Coagulase-negative staphylococci (CoNS) are the most common contaminants of blood cultures, however, we sometimes have difficulties in determining their clinical significance. It is still controversial that there is a significant difference between the contamination group and the true bacteraemia group in the time to positivity (TTP) of blood cultures. We validated the relationship between a TTP and the presence of CoNS bacteraemia in cancer patients by using an objective, non-judgmental definition for CoNS contamination...
March 16, 2018: Infectious Diseases
Nafisatu Bello, Abubakar Tukur Dawakin Kudu, Azeezat Bolanle Adetokun, Dalha Wada Taura, Yusuf Dan'asabe Jobbi, Mustapha Umar, Ibrahim Yusuf
Background and Objectives: Bacterial infection in sickle cell anaemic patients is a major cause of mortality and requires proper treatment with appropriate antibiotics. However, continue defiant of these infections causing pathogens to many antibiotics and inadequate screening methods in overburden health care facilities such as our in Kano, Nigeria necessitates the conduct of this study. A research was therefore conducted to isolate, characterize and test for antimicrobial susceptibility of bacteraemia-causing pathogens from febrile children with and without sickle cell disease in Kano, Nigeria...
2018: Mediterranean Journal of Hematology and Infectious Diseases
Hiroshige Mikamo, Yoshio Takesue, Yuji Iwamoto, Takahiko Tanigawa, Masaharu Kato, Yoko Tanimura, Shigeru Kohno
The objective of this open-label, randomised (i.e. 2:1 ratio), Phase 3 study was to compare the efficacy and safety of tedizolid phosphate 200 mg, once-daily treatment with that of linezolid 600 mg, twice-daily treatment for 7-14 days in Japanese adult patients (N = 125) with skin and soft tissue infections (SSTIs) and/or for 7-21 days for those with SSTI-related bacteraemia, caused by confirmed or highly suspected methicillin-resistant Staphylococcus aureus (MRSA). Primary outcome was clinical cure rate at test-of-cure (TOC, in SSTI: 7-14 days, in bacteraemia: 4-6 weeks after end-of-therapy [EOT]) time point in the microbiologically evaluable MRSA (ME-MRSA) population (N = 39)...
March 9, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
James J Gilchrist, Anna Rautanen, Benjamin P Fairfax, Tara C Mills, Vivek Naranbhai, Holly Trochet, Matti Pirinen, Esther Muthumbi, Salim Mwarumba, Patricia Njuguna, Neema Mturi, Chisomo L Msefula, Esther N Gondwe, Jenny M MacLennan, Stephen J Chapman, Malcolm E Molyneux, Julian C Knight, Chris C A Spencer, Thomas N Williams, Calman A MacLennan, J Anthony G Scott, Adrian V S Hill
Nontyphoidal Salmonella (NTS) is a major cause of bacteraemia in Africa. The disease typically affects HIV-infected individuals and young children, causing substantial morbidity and mortality. Here we present a genome-wide association study (180 cases, 2677 controls) and replication analysis of NTS bacteraemia in Kenyan and Malawian children. We identify a locus in STAT4, rs13390936, associated with NTS bacteraemia. rs13390936 is a context-specific expression quantitative trait locus for STAT4 RNA expression, and individuals carrying the NTS-risk genotype demonstrate decreased interferon-γ (IFNγ) production in stimulated natural killer cells, and decreased circulating IFNγ concentrations during acute NTS bacteraemia...
March 9, 2018: Nature Communications
Katherine Elizabeth Triplett, Ronan Murray, Matthew Anstey
A 51-year-old female presented with acute confusion associated with a non-specific headache and lethargy. The patient's history included bipolar disorder on valproate and recent travel to northern Vietnam. The patient was subsequently found to have hyperammonaemia as well as a urinary tract infection and bacteraemia with Klebsiellapneumoniae The patient was presumed to have a multifactorial non-cirrhotic hyperammonaemic encephalopathy due to a combination of a urinary tract infection and bacteraemia with K...
March 9, 2018: BMJ Case Reports
I M Markusse, S P van Mens, P J de Vries
A 40-year-old woman with a history of liver cirrhosis presented with septic shock caused by an Anaerobiospirillum succiniciproducens bacteraemia after a cat bite. A. succiniciproducens sepsis can develop after a cat or dog bite, especially in immunocompromised hosts, or might occur after translocation from the gut flora. It is a potentially lethal infection.
March 2018: Netherlands Journal of Medicine
Peter M Hawkey, Roderic E Warren, David M Livermore, Cliodna A M McNulty, David A Enoch, Jonathan A Otter, A Peter R Wilson
The Working Party makes more than 100 tabulated recommendations in antimicrobial prescribing for the treatment of infections caused by multidrug-resistant (MDR) Gram-negative bacteria (GNB) and suggest further research, and algorithms for hospital and community antimicrobial usage in urinary infection. The international definition of MDR is complex, unsatisfactory and hinders the setting and monitoring of improvement programmes. We give a new definition of multiresistance. The background information on the mechanisms, global spread and UK prevalence of antibiotic prescribing and resistance has been systematically reviewed...
March 1, 2018: Journal of Antimicrobial Chemotherapy
Natasha E Holmes, J Owen Robinson, Sebastiaan J van Hal, Wendy J Munckhof, Eugene Athan, Tony M Korman, Allen C Cheng, John D Turnidge, Paul D R Johnson, Benjamin P Howden
BACKGROUND: Various studies have identified numerous factors associated with poor clinical outcomes in patients with Staphylococcus aureus bacteraemia (SAB). A new study was created to provide deeper insight into in-hospital complications and risk factors for treatment failure. METHODS: Adult patients hospitalised with Staphylococcus aureus bacteraemia (SAB) were recruited prospectively into a multi-centre cohort. The primary outcome was treatment failure at 30 days (composite of all-cause mortality, persistent bacteraemia, or recurrent bacteraemia), and secondary measures included in-hospital complications and mortality at 6- and 12-months...
March 5, 2018: BMC Infectious Diseases
Lara Thieme, Mareike Klinger-Strobel, Anita Hartung, Claudia Stein, Oliwia Makarewicz, Mathias W Pletz
Background: Enterococci frequently cause severe biofilm-associated infections such as endocarditis. The combination of ampicillin/ceftriaxone has recently been clinically evaluated as non-inferior compared with the standard therapy of ampicillin/gentamicin for treatment of Enterococcus faecalis endocarditis. Ceftaroline is a novel cephalosporin with enhanced activity against Gram-positive bacteria. Objectives: To compare the in vitro effectiveness of the ceftaroline/ampicillin combination with those of gentamicin/ampicillin and ceftriaxone/ampicillin in planktonic and biofilm cultures of clinical E...
February 28, 2018: Journal of Antimicrobial Chemotherapy
Yu-Tsung Huang, Chun-Hsing Liao, Shey-Ying Chen, Hsin-Sui Hsu, Lee-Jene Teng, Po-Ren Hsueh
Clinical data related to bacteraemia caused by mecA-positive borderline-oxacillin resistant (minimum inhibitory concentrations, 0.5-4 mg/L) Staphylococcus aureus (BORSA) isolates are limited. Patients (age >15 years) with bacteraemia due to BORSA who were admitted to the emergency department in a tertiary hospital between January 2001 and December 2015 were evaluated. Clinical characteristics of patients with bacteraemia caused by BORSA, methicillin-susceptible S. aureus and MRSA were compared. Minimum inhibitory concentrations of 12 antibiotics were determined using the agar dilution method...
March 2, 2018: International Journal of Antimicrobial Agents
Emma McGuire, Simon Tiberi, Holly Ciesielczuk, Mark Melzer
We present a rare case of Shigella flexneri bacteraemia and toxic megacolon, and discuss the challenges of conventional laboratory techniques versus molecular PCR platforms in differentiating between Shigella species and Escherichia coli.
March 1, 2018: International Journal of Infectious Diseases: IJID
J S Davis, J Turnidge, S Y C Tong
BACKGROUND AND OBJECTIVES: Antistaphylococcal penicillins (ASPs) are recommended as first line treatment for invasive infections caused by methicillin-susceptible Staphylococcus aureus (MSSA). Cefazolin is an alternative option, but there is theoretical concern about using it due to the fact that some MSSA strains produce beta-lactamases active against cefazolin. We aimed to compare outcomes from patients with MSSA infections treated with flucloxacillin and cefazolin. METHODS: We analysed data from The Australia and New Zealand Co-operative Outcomes of Staphylococcal Sepsis (ANZCOSS) observational study, which included all consecutive unique episodes of Staphylococcus aureus bacteraemia from 27 hospital-based or independent microbiology laboratories from January 2007 to September 2013...
February 27, 2018: International Journal of Antimicrobial Agents
Michael P Ryan, J Tony Pembroke
Non-fermenting Gram-negative bacteria are problematic in clinical locations, being one of the most prevalent causes of nosocomial infections. Many of these non-fermenting Gram-negative bacteria are opportunistic pathogens that affect patients that are suffering with underlying medical conditions and diseases. Brevundimonas spp., in particular Brevundimonas diminuta and Brevundimonas vesicularis, are a genus of non-fermenting Gram-negative bacteria considered of minor clinical importance. Forty-nine separate instances of infection relating to Brevundimonas spp were found in the scientific literature along with two pseudo-infections...
January 1, 2018: Virulence
Srilata Ballu, Ramesh Itteboina, Sree Kanth Sivan, Vijjulatha Manga
Staphylococcus aureus is a gram positive bacterium. It is the leading cause of skin and respiratory infections, osteomyelitis, Ritter's disease, endocarditis, and bacteraemia in the developed world. We employed combined studies of 3D QSAR, molecular docking which are validated by molecular dynamics simulations and in silico ADME prediction have been performed on Isothiazoloquinolones inhibitors against methicillin resistance Staphylococcus aureus. Three-dimensional quantitative structure-activity relationship (3D-QSAR) study was applied using comparative molecular field analysis (CoMFA) with Q2 of 0...
December 20, 2017: Computational Biology and Chemistry
F N J Frakking, W S Bril, J C Sinnige, J E van 't Klooster, B A W de Jong, E J van Hannen, M Tersmette
BACKGROUND: A large outbreak of three epidemic vancomycin-resistant Enterococcus faecium (VRE) clones affected our hospital for almost two years. AIM: To describe the strategy to successfully control this outbreak and eradicate VRE from our hospital. METHODS: Infection control interventions started after detection of VRE in three patients. After ongoing transmission despite isolation precautions, cleaning and contact tracing, hospital-wide surveillance was started...
February 20, 2018: Journal of Hospital Infection
Peera Hemarajata, Thomas Amick, Shangxin Yang, Aric Gregson, Cameron Holzmeyer, Karen Bush, Romney M Humphries
Objectives: Antibiotic selective pressure may result in changes to antimicrobial susceptibility throughout the course of infection, especially for organisms that harbour chromosomally encoded AmpC β-lactamases, notably Enterobacter spp., in which hyperexpression of ampC may be induced following treatment with cephalosporins. In this study, we document a case of bacteraemia caused by a blaSME-1-harbouring Serratia marcescens that subsequently developed resistance to expanded-spectrum cephalosporins, piperacillin/tazobactam and fluoroquinolones, over the course of several months of treatment with piperacillin/tazobactam and ciprofloxacin...
February 19, 2018: Journal of Antimicrobial Chemotherapy
Ashish K Singh, Rosanne Y Hertzberger, Ulla G Knaus
Inflammatory bowel disease (IBD) is a multifactorial chronic inflammatory disease of the gastrointestinal tract, characterized by cycles of acute flares, recovery and remission phases. Treatments for accelerating tissue restitution and prolonging remission are scarce, but altering the microbiota composition to promote intestinal homeostasis is considered a safe, economic and promising approach. Although probiotic bacteria have not yet fulfilled fully their promise in clinical trials, understanding the mechanism of how they exert beneficial effects will permit devising improved therapeutic strategies...
February 12, 2018: Redox Biology
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