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https://www.readbyqxmd.com/read/28811108/methylene-blue-guided-debridement-as-an-intraoperative-adjunct-for-the-surgical-treatment-of-periprosthetic-joint-infection
#1
Jeremy D Shaw, Steve Miller, Anna Plourde, Daniel L Shaw, Rosanna Wustrack, Erik N Hansen
BACKGROUND: Current methods to identify infected tissue in periprosthetic joint infection (PJI) are inadequate. The purpose of this study was (1) to assess methylene blue-guided surgical debridement as a novel technique in PJI using quantitative microbiology and (2) to evaluate clinical success based on eradication of infection and infection-free survival. METHODS: Sixteen total knee arthroplasty patients meeting Musculoskeletal Infection Society criteria for PJI undergoing the first stage of 2-stage exchange arthroplasty were included in this prospective study...
July 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28797124/preclinical-development-of-a-vaccine-against-oligomeric-alpha-synuclein-based-on-virus-like-particles
#2
Marika Doucet, Aadil El-Turabi, Franziska Zabel, Benjamin H M Hunn, Nora Bengoa-Vergniory, Milena Cioroch, Mauricio Ramm, Amy M Smith, Ariane Cruz Gomes, Gustavo Cabral de Miranda, Richard Wade-Martins, Martin F Bachmann
Parkinson's disease (PD) is a progressive and currently incurable neurological disorder characterised by the loss of midbrain dopaminergic neurons and the accumulation of aggregated alpha-synuclein (a-syn). Oligomeric a-syn is proposed to play a central role in spreading protein aggregation in the brain with associated cellular toxicity contributing to a progressive neurological decline. For this reason, a-syn oligomers have attracted interest as therapeutic targets for neurodegenerative conditions such as PD and other alpha-synucleinopathies...
2017: PloS One
https://www.readbyqxmd.com/read/28771993/a-pegylated-fibrin-hydrogel-based-antimicrobial-wound-dressing-controls-infection-without-impeding-wound-healing
#3
Joel Gil, Shanmugasundaram Natesan, Jie Li, Jose Valdes, Andrew Harding, Michael Solis, Stephen C Davis, Robert J Christy
Combat injuries are associated with a high incidence of infection, and there is a continuing need for improved approaches to control infection and promote wound healing. Due to the possible local and systemic adverse effects of standard 1% cream formulation (Silvadene), we had previously developed a polyethylene glycol (PEGylated) fibrin hydrogel (FPEG)-based wound dressing for the controlled delivery of silver sulfadiazine (SSD) entrapped in chitosan microspheres (CSM). In this study, we have evaluated the antimicrobial and wound healing efficacy of SSD-CSM-FPEG using a full-thickness porcine wound infected with Pseudomonas aeruginosa...
August 2, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28745010/the-detrimental-impact-of-extracellular-bacterial-proteases-on-wound-healing
#4
Sharon Lindsay, Angela Oates, Katie Bourdillon
In addition to clinical signs of infection (e.g. inflammation, purulence and pain), a microbial count of ≥10(5) colony-forming units/g has historically been used to define wound infection. However, it is increasingly recognised that, rather than a high bioburden level alone being detrimental to wound healing, it is the virulence of the invading microorganism and the host's immune status that can affect clinical outcomes. Bacteria, such as Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus epidermidis, have developed a range of virulence factors to help them overcome host defences and proliferate within the underlying soft tissue...
July 25, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28732741/long-acting-water-stable-organosilane-agent-and-its-sustained-effect-on-reducing-microbial-load-in-an-intensive-care-unit
#5
Katie Fitton, Kimberly R Barber, Alison Karamon, Nate Zuehlke, Sara Atwell, Susan Enright
BACKGROUND: Contaminated hospital surfaces contribute significantly to the transmission of health care-associated infections. Although disinfectants reduce bioburden by up to 99%, bacterial growth can rebound within hours to precleaning levels. We tested the effectiveness of an innovative, long-acting water-stable organosilane (WSO) to achieve sustained decreases in bioburden on hard surfaces. METHODS: A 5-month prospective, randomized, double-blind controlled study was performed...
July 18, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28732530/minocycline-modulates-nf%C3%AE%C2%BAb-phosphorylation-and-enhances-antimicrobial-activity-against-staphylococcus-aureus-in-mesenchymal-stromal-stem-cells
#6
Alberto Daniel Guerra, Warren E Rose, Peiman Hematti, W John Kao
BACKGROUND: Mesenchymal stromal/stem cells (MSCs) have demonstrated pro-healing properties due to their anti-inflammatory, angiogenic, and even antibacterial properties. We have shown previously that minocycline enhances the wound healing phenotype of MSCs, and MSCs encapsulated in poly(ethylene glycol) and gelatin-based hydrogels with minocycline have antibacterial properties against Staphylococcus aureus (SA). Here, we investigated the signaling pathway that minocycline modulates in MSCs which results in their enhanced wound healing phenotype and determined whether preconditioning MSCs with minocycline has an effect on antimicrobial activity...
July 21, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28726559/supercritical-carbon-dioxide-assisted-decellularization-of-aorta-and-cornea
#7
Selcan Guler, Bahar Aslan, Pezhman Hosseinian, Halil Murat Aydin
Tissue engineering approaches utilize both natural and synthetic materials in the repair and regeneration processes. A naturally sourced material for this purpose is required to be free from any antigenic matter such as cells or cellular components. Decellularization of tissues may be achieved through chemical or physical removal agents. Supercritical carbon dioxide (sc-CO2) has been used on the purpose of removing bioburden from tissues and offers an alternative to the traditionally used treatment methods...
August 17, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28696230/implications-of-antimicrobial-combinations-in-complex-wound-biofilms-containing-fungi
#8
Eleanor M Townsend, Leighann Sherry, Ryan Kean, Donald Hansom, William G Mackay, Craig Williams, John Butcher, Gordon Ramage
Diabetic foot ulcer treatment currently focuses on targeting bacterial biofilms, while dismissing fungi. To investigate this we used an in vitro biofilm model containing bacteria and fungi, reflective of the wound environment, to test the impact of antimicrobials. Here we showed that while mono-treatment approaches influenced biofilm composition it had no discernible effect on overall quantity. Only by combining bacterial and fungal specific antibiotics were we able to decrease the biofilm bioburden, irrespective of composition...
July 10, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28684346/antibiotic-loaded-bone-graft-for-reduction-of-surgical-site-infection-in-spinal-fusion
#9
Stefanie M Shiels, Vivek P Raut, Patrick B Patterson, Brian R Barnes, Joseph C Wenke
BACKGROUND CONTEXT: Infections remain a leading complication associated with spinal arthrodesis, regardless of the use of prophylactic antibiotics and improved surgical techniques, with incidence of infection as high as 8.2%. Infection prolongs antibiotic usage, increases hospital time, and inevitably inflates overall treatment costs. Local antibiotics, such as vancomycin, have been used in combination with fusion materials over the past decade to decrease infection risk. An ideal graft material would serve a dual role: encourage vertebral fusion while reducing incidence of infection...
July 3, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28625700/the-effectiveness-of-sterilization-for-flexible-ureteroscopes-a-real-world-study
#10
Cori L Ofstead, Otis L Heymann, Mariah R Quick, Ellen A Johnson, John E Eiland, Harry P Wetzler
BACKGROUND: There are no guidelines or quality benchmarks specific to ureteroscope reprocessing, and patient injuries and infections have been linked to ureteroscopes. This prospective study evaluated ureteroscope reprocessing effectiveness. METHODS: Reprocessing practices at 2 institutions were assessed. Microbial cultures, biochemical tests, and visual inspections were conducted on sterilized ureteroscopes. RESULTS: Researchers examined 16 ureteroscopes after manual cleaning and sterilization using hydrogen peroxide gas...
May 4, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28624776/mold-control-and-detection-in-biological-drug-substance-manufacturing-facilities-an-industry-perspective
#11
Anita Bawa, Sophia Asefi, Stephanie Ramsey, Christine Arbesser-Rastburg, Mousumi Paul, Francisco Leira, Kim McFarland, Tracy Landeryou, Bindhu Reddy, Marie Murphy, Barbara Daddis, David Baine, Derek Willison-Parry
The biopharmaceutical industry produces non-sterile and/or low-bioburden intermediates and bulk biologics (i.e. Drug Substances) using bioburden controlled processes in accordance to Q7A and Annex 2. In many cases, single mold isolation events have received a high level of scrutiny; the goal of this paper is to challenge this paradigm and provide the rationale for an enhanced control approach that focuses on trending of mold species as microbial indicators rather than on single isolation events. Molds, can also be part (in much lower numbers) of the normal microbial population of a biologics manufacturing facility and, therefore, mold isolation is not an unexpected event in non-aseptic processing environments...
June 16, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28602266/does-negative-pressure-wound-therapy-influence-subjacent-bacterial-growth-a-systematic-review
#12
REVIEW
Graeme E Glass, George R F Murphy, Jagdeep Nanchahal
BACKGROUND: Negative-pressure wound therapy is a ubiquitous wound management resource. The influence of NPWT on the bacterial bioburden of the subjacent wound remains unclear. We sought to examine the evidence. DATASOURCES: MEDLINE, Embase, PubMed, the Cochrane Database of Systematic Reviews and the Cochrane Controlled Trials Register were searched for articles quantitatively evaluating bacterial load under NPWT. RESULTS: Twenty-four studies met the inclusion criteria including 4 randomised controlled trials, 8 clinical series and 12 experimental studies...
May 22, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28599034/a-prospective-randomized-controlled-two-arm-clinical-study-evaluating-the-efficacy-of-a-bioelectric-dressing-system-for-blister-management-in-us-army-ranger-recruits
#13
Greggory J Housler, Sue Cross, Vanessa Marcel, Daniel O Kennedy, Michael Husband, Andrew Register, Thomas Roberts, Seth Grubbs, Douglas Dudewicz, Nathan Setka, Curt Bay, Martin E Wendelken, Mina J Izadjoo
This study focused on a clinically relevant healthcare problem in the military: acute soft tissue wounds, or blisters. The trial was a prospective, controlled, randomized two-arm study evaluating the efficacy of a bioelectric dressing, Procellera®, applied topically two to three times per week for 2 weeks to blisters developed in Ranger trainees during training at Fort Benning, Georgia. A total of 80 US Army Ranger recruits with blister wounds below the knee were randomly assigned to one of two treatment groups (n = 40/group)...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28594320/silver-containing-foam-dressings-with-safetac-a-review-of-the-scientific-and-clinical-data
#14
Phil Davies, Sara McCarty, Kristina Hamberg
Background Topical antimicrobials, such as silver dressings, are progressively being used alongside systemic antibiotics to provide adjunctive, antimicrobial therapy to wounds that are clinically infected or at risk of infection. To help improve wound management, dressings that use Safetac soft silicone technology in combination with a silver-impregnated foam dressing material were developed by Mölnlycke Health Care (Gothenburg, Sweden). The range comprises Mepilex Ag, Mepilex Border Ag and Mepilex Transfer Ag...
June 1, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28575999/sterilization-of-silicone-based-hydrogels-for-biomedical-application-using-ozone-gas-comparison-with-conventional-techniques
#15
Raquel Galante, Daniela Ghisleni, Patrizia Paradiso, Vitor D Alves, Terezinha J A Pinto, Rogério Colaço, Ana Paula Serro
Sterilization of hydrogels is challenging due to their often reported sensitivity to conventional methods involving heat or radiation. Although aseptic manufacturing is a possibility, terminal sterilization is safer in biological terms, leading to a higher overall efficiency, and thus should be used whenever it is possible. The main goal of this work was to study the applicability of an innovative ozone gas terminal sterilization method for silicone-based hydrogels and compare its efficacy and effects with those of traditional sterilization methods: steam heat and gamma irradiation...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28570250/effect-of-negative-pressure-wound-therapy-with-instillation-on-bioburden-in-chronically-infected-wounds
#16
Chun Yang, Selena G Goss, Sean Alcantara, Greg Schultz, John C Lantis Ii
INTRODUCTION: Standard negative pressure wound therapy (NPWT) has been shown to help close wounds despite increasing planktonic bioburden. Both planktonic and biofilm critical colonization are associated with delayed wound healing; therefore, reducing microbial colonization is thought to aid wound healing. The use of NPWT with topical antimicrobial irrigation solution has previously shown reduction in quantitative planktonic bioburden when combined with sharp debridement in chronic wounds...
May 25, 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28566785/combined-negative-pressure-wound-therapy-with-open-bone-graft-for-infected-wounds-with-bone-defects-an-experimental-study
#17
Ramesh Kumar Jha, Chengyan Xia, Zonghuan Li, Weiyang Wang, Kai Deng
BACKGROUND: Bone and soft-tissue defects in infected wound have been an intractable problem to many surgical consultations. Infected wounds with bone defects are physical and financial burden to society. Nowadays, infected wounds with compound defect of bone and soft tissues are common in orthopedics department. Currently, no simple and efficient treatment has been found to solve this problem. This study investigates the effects of combining negative pressure wound therapy (NPWT) with open bone graft on this focus...
May 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28522324/non-invasive-three-dimensional-imaging-of-escherichia-coli-k1-infection-using-diffuse-light-imaging-tomography-combined-with-micro-computed-tomography
#18
REVIEW
Luci A Witcomb, Julie Czupryna, Kevin P Francis, Gad Frankel, Peter W Taylor
In contrast to two-dimensional bioluminescence imaging, three dimensional diffuse light imaging tomography with integrated micro-computed tomography (DLIT-μCT) has the potential to realise spatial variations in infection patterns when imaging experimental animals dosed with derivatives of virulent bacteria carrying bioluminescent reporter genes such as the lux operon from the bacterium Photorhabdus luminescens. The method provides an opportunity to precisely localise the bacterial infection sites within the animal and enables the generation of four-dimensional movies of the infection cycle...
May 15, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28503756/biofilms-and-delayed-healing%C3%A2-%C3%A2-an-in-vitro-evaluation-of-silver-and-iodine-containing-dressings-and-their-effect-on-bacterial-and-human-cells
#19
Katie A Bourdillon, Craig P Delury, Breda M Cullen
This study investigated whether there are differences in the ability of wound dressings to modulate certain factors known to affect wound healing. A selection of antimicrobial dressings (AQUACEL(®) Ag Extra(™) , AQUACEL(®) Ag+ Extra(™) , IODOFLEX(™) , ACTICOAT(™) 7 and PROMOGRAN PRISMA(™) matrix) were tested for their effect on both bacterial bioburden and human dermal fibroblasts. Some dressings underwent further evaluation for activity against Pseudomonas aeruginosa biofilms using a colony-drip flow reactor model...
May 14, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28480504/the-feasibility-of-gamma-radiation-sterilization-for-decellularized-tracheal-grafts
#20
Christopher M Johnson, DeHuang Guo, Stephanie Ryals, Gregory N Postma, Paul M Weinberger
OBJECTIVES/HYPOTHESIS: The most promising stem cell-derived tracheal transplantation approach is dependent upon the use of decellularized tracheal grafts. It has been assumed that a sterilization step, such as gamma radiation, would damage the delicate extracellular matrix of the graft, thus rendering it less viable for cellular repopulation, although this has not been thoroughly investigated. STUDY DESIGN: Laboratory-based comparative analysis. METHODS: Fifteen murine tracheas of strain C57/B-6 mice were obtained...
May 7, 2017: Laryngoscope
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