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hydrogen peroxide decontamination

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https://www.readbyqxmd.com/read/28642746/virucidal-activity-of-fogged-chlorine-dioxide-and-hydrogen-peroxide-based-disinfectants-against-human-norovirus-and-its-surrogate-feline-calicivirus-on-hard-to-reach-surfaces
#1
Naim Montazeri, Clyde Manuel, Eric Moorman, Janak R Khatiwada, Leonard L Williams, Lee-Ann Jaykus
Human norovirus (NoV) is the leading cause of foodborne illnesses in the United States. Norovirus is shed in high numbers in the feces and vomitous of infected individuals. Contact surfaces contaminated with bodily fluids harboring infectious virus particles serve as vehicles for pathogen transmission. Environmental stability of NoV and its resistance to many conventional disinfectants necessitate effective inactivation strategies to control the spread of virus. We investigated the efficacy of two commercial disinfectants, hydrogen peroxide (7...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28610932/automatic-environmental-disinfection-with-hydrogen-peroxide-and-ion-silver-versus-manual-environmental-disinfection-with-sodium-hypochlorite-a-multicenter-randomized-before-and-after-trial
#2
D Mosci, G W Marmo, L Sciolino, C Zaccaro, R Antonellini, L Accogli, T Lazzarotto, M Mongardi, M P Landini
AIMS: 1. Compare the effectiveness of an automated disinfection system with hydrogen peroxide <8% and silver ion versus a manual method with 0.5% sodium hypochlorite solution to evaluate the reduction of microbial mesophilic contamination and Clostridium difficile (CD) presence; 2. Evaluate the organizational impact of these two technologies in terms of time required for the process. METHODS: A randomized multicenter trial performed in four public and private health facilities in the Emilia-Romagna Region, in different wards including medicine, orthopaedics, long-term care, recovery and functional rehabilitation, which were previously occupied by patients with Clostridium difficile Infection (CDI)...
June 10, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28524724/antibacterial-effect-of-hydrogen-peroxide-titanium-dioxide-suspensions-in-the-decontamination-of-rough-titanium-surfaces
#3
David Wiedmer, Fernanda Cristina Petersen, Jessica Lönn-Stensrud, Hanna Tiainen
The chemical decontamination of infected dental implants is essential for the successful treatment of peri-implantitis. The aim of this study was to assess the antibacterial effect of a hydrogen peroxide-titanium dioxide (H2O2-TiO2) suspension against Staphylococcus epidermidis biofilms. Titanium (Ti) coins were inoculated with a bioluminescent S. epidermidis strain for 8 h and subsequently exposed to H2O2 with and without TiO2 nanoparticles or chlorhexidine (CHX). Bacterial regrowth, bacterial load and viability after decontamination were analyzed by continuous luminescence monitoring, live/dead staining and scanning electron microscopy...
May 19, 2017: Biofouling
https://www.readbyqxmd.com/read/28512177/evaluation-of-novel-process-indicators-for-rapid-monitoring-of-hydrogen-peroxide-decontamination-processes
#4
Neil P McLeod, Melanie Clifford, J Mark Sutton
Geobacillus stearothermophilus spores on stainless steel discs are routinely used as Biological Indicators (BIs) for the validation of hydrogen peroxide bio-decontamination processes. Given ongoing concerns about the reliability and response time of BIs, we explored the potential for an enzyme-based approach decontamination process evaluation. Thermostable adenylate kinase (tAK) enzyme was coated onto a solid support and exposed to hydrogen peroxide vapour, in parallel with standard commercial 6-log BIs, during a series of vapour-phase hydrogen peroxide (VPHP) cycles in a flexible film isolator...
May 15, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28500989/pharmaceuticals-benzene-toluene-and-chlorobenzene-removal-from-contaminated-groundwater-by-combined-uv-h2o2-photo-oxidation-and-aeration
#5
Ondřej Lhotský, Eva Krákorová, Pavel Mašín, Radim Žebrák, Lucie Linhartová, Zdena Křesinová, Josef Kašlík, Jana Steinová, Torgeir Rødsand, Alena Filipová, Klára Petrů, Kristýna Kroupová, Tomáš Cajthaml
This study was performed to test the feasibility of several decontamination methods for remediating heavily contaminated groundwater in a real contaminated locality in the Czech Republic, where a pharmaceuticals plant has been in operation for more than 80 years. The site is polluted mainly by recalcitrant psychopharmaceuticals and monoaromatic hydrocarbons, such as benzene, toluene and chlorobenzene. For this purpose, an advanced oxidation technique employing UV radiation with hydrogen peroxide dosing was employed, in combination with simple aeration pretreatment...
April 30, 2017: Water Research
https://www.readbyqxmd.com/read/28482224/use-of-photo-fenton-s-reaction-by-400-nm-led-light-for-endodontic-disinfection-a-preliminary-in-vitro-study-on-enterococcus-faecalis
#6
Giuseppe Lagori, Carlo Fornaini, Jean-Paul Rocca, Elisabetta Merigo
One of the biggest challenges in endodontics is the complete disinfection of root canals. In addition to mechanical preparation, the technique traditionally also involves channel disinfection with other agents such as sodium hypochlorite, hydrogen peroxide, chlorhexidine, or a combination of these. Some bacterial species are particularly resistant to eradication. Using Enterococcus faecalis in this preliminary study, we tested the bactericidal effectiveness of the Fenton reaction and the photo-Fenton reaction using an LED light with a 400-nm wavelength...
June 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28212822/cryptosporidium-contaminated-water-disinfection-by-a-novel-fenton-process
#7
Sina Matavos-Aramyan, Mohsen Moussavi, Hedieh Matavos-Aramyan, Sara Roozkhosh
Three novel modified advanced oxidation process systems including ascorbic acid-, pro-oxidants- and ascorbic acid-pro-oxidants-modified Fenton system were utilized to study the disinfection efficiency on Cryptosporidium-contaminated drinking water samples. Different concentrations of divalent and trivalent iron ions, hydrogen peroxide, ascorbic acid and pro-oxidants at different exposure times were investigated. These novel systems were also compared to the classic Fenton system and to the control system which comprised of only hydrogen peroxide...
February 16, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28196152/human-histologic-evidence-of-reosseointegration-around-an-implant-affected-with-peri-implantitis-following-decontamination-with-sterile-saline-and-antiseptics-a-case-history-report
#8
Paul Fletcher, Daniel Deluiz, Eduardo Mb Tinoco, John L Ricci, Dennis P Tarnow, Justine Monnerat Tinoco
The treatment of peri-implant disease is one of the most controversial topics in implant dentistry. The multifactorial etiology and the myriad proposed techniques for managing the problem make successful decontamination of an implant surface affected by peri-implantitis one of the more unpredictable challenges dental practitioners have to face. This article presents the first known published case report demonstrating human histologic evidence of reosseointegration using a plastic curette for mechanical debridement and dilute sodium hypochlorite, hydrogen peroxide, and sterile saline for chemical detoxification...
February 14, 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28155914/evolutionary-clade-affects-resistance-of-clostridium-difficile-spores-to-cold-atmospheric-plasma
#9
Mairéad Connor, Padrig B Flynn, Derek J Fairley, Nikki Marks, Panagiotis Manesiotis, William G Graham, Brendan F Gilmore, John W McGrath
Clostridium difficile is a spore forming bacterium and the leading cause of colitis and antibiotic associated diarrhoea in the developed world. Spores produced by C. difficile are robust and can remain viable for months, leading to prolonged healthcare-associated outbreaks with high mortality. Exposure of C. difficile spores to a novel, non-thermal atmospheric pressure gas plasma was assessed. Factors affecting sporicidal efficacy, including percentage of oxygen in the helium carrier gas admixture, and the effect on spores from different strains representing the five evolutionary C...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27934804/use-of-hydrogen-peroxide-vapour-plasma-irradiation-in-combination-for-quick-decontamination-of-closed-chambers
#10
Devendra T Mourya, Hamish C Shahani, Pragya D Yadav, Pradip V Barde
BACKGROUND & OBJECTIVES: Various conventional methods such as gaseous, vapour and misting systems, fogging, manual spray and wipe techniques employing a number of chemical agents are used for decontamination of enclosed spaces. Among all these methods, use of aerosolized formaldehyde is the most preferred method due to cost-effectiveness and practical aspects. However, being extremely corrosive in nature generating very irritating fumes and difficulty in maintaining a high level of gas concentration, many laboratories prefer the vaporization of hydrogen peroxide (H 2 O 2 ) as an alternative...
August 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/27866755/evaluation-of-an-automated-room-decontamination-device-using-aerosolized-peracetic-acid
#11
Thriveen S C Mana, Brett Sitzlar, Jennifer L Cadnum, Annette L Jencson, Sreelatha Koganti, Curtis J Donskey
Because manual cleaning is often suboptimal, there is increasing interest in use of automated devices for room decontamination. We demonstrated that an ultrasonic room fogging system that generates submicron droplets of peracetic acid and hydrogen peroxide eliminated Clostridium difficile spores and vegetative pathogens from exposed carriers in hospital rooms and adjacent bathrooms.
November 18, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/27833595/chemical-and-stress-resistances-of-clostridium-difficile-spores-and-vegetative-cells
#12
Adrianne N Edwards, Samiha T Karim, Ricardo A Pascual, Lina M Jowhar, Sarah E Anderson, Shonna M McBride
Clostridium difficile is a Gram-positive, sporogenic and anaerobic bacterium that causes a potentially fatal colitis. C. difficile enters the body as dormant spores that germinate in the colon to form vegetative cells that secrete toxins and cause the symptoms of infection. During transit through the intestine, some vegetative cells transform into spores, which are more resistant to killing by environmental insults than the vegetative cells. Understanding the inherent resistance properties of the vegetative and spore forms of C...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27777756/first-hospital-outbreak-of-the-globally-emerging-candida-auris-in-a-european-hospital
#13
Silke Schelenz, Ferry Hagen, Johanna L Rhodes, Alireza Abdolrasouli, Anuradha Chowdhary, Anne Hall, Lisa Ryan, Joanne Shackleton, Richard Trimlett, Jacques F Meis, Darius Armstrong-James, Matthew C Fisher
BACKGROUND: Candida auris is a globally emerging multidrug resistant fungal pathogen causing nosocomial transmission. We report an ongoing outbreak of C. auris in a London cardio-thoracic center between April 2015 and July 2016. This is the first report of C. auris in Europe and the largest outbreak so far. We describe the identification, investigation and implementation of control measures. METHODS: Data on C. auris case demographics, environmental screening, implementation of infection prevention/control measures, and antifungal susceptibility of patient isolates were prospectively recorded then analysed retrospectively...
2016: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/27746394/counting-the-cost-of-an-outbreak-of-carbapenemase-producing-enterobacteriaceae-an-economic-evaluation-from-a-hospital-perspective
#14
J A Otter, P Burgess, F Davies, S Mookerjee, J Singleton, M Gilchrist, D Parsons, E T Brannigan, J Robotham, A H Holmes
OBJECTIVE: To perform an economic evaluation on the cost associated with an outbreak of carbapenemase-producing Enterobacteriaceae (CPE). METHODS: We performed an observational economic evaluation of an outbreak of CPE (NDM-producing Klebsiella pneumoniae) affecting 40 patients in a group of five hospitals across three sites in West London. Costs were split into actual expenditure (including anti-infective costs, enhanced CPE screening, contact precautions, temporary ward-based monitors of hand and environmental practice, and environmental decontamination), and 'opportunity cost' (staff time, bed closures and elective surgical missed revenue)...
March 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/27588429/fenton-like-catalysis-and-oxidation-adsorption-performances-of-acetaminophen-and-arsenic-pollutants-in-water-on-a-multimetal-cu-zn-fe-ldh
#15
Hongtao Lu, Zhiliang Zhu, Hua Zhang, Jianyao Zhu, Yanling Qiu, Linyan Zhu, Stephan Küppers
Acetaminophen can increase the risk of arsenic-mediated hepatic oxidative damage; therefore, the decontamination of water polluted with coexisting acetaminophen and arsenic gives rise to new challenges for the purification of drinking water. In this work, a three-metal layered double hydroxide, namely, Cu-Zn-Fe-LDH, was synthesized and applied as a heterogeneous Fenton-like oxidation catalyst and adsorbent to simultaneously remove acetaminophen (Paracetamol, PR) and arsenic. The results showed that the degradation of acetaminophen was accelerated with decreasing pH or increasing H2O2 concentrations...
September 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27569380/a-simple-decontamination-approach-using-hydrogen-peroxide-vapour-for-bacillus-anthracis-spore-inactivation
#16
J P Wood, M W Calfee, M Clayton, N Griffin-Gatchalian, A Touati, S Ryan, L Mickelsen, L Smith, V Rastogi
AIMS: To evaluate the use of relatively low levels of hydrogen peroxide vapour (HPV) for the inactivation of Bacillus anthracis spores within an indoor environment. METHODS AND RESULTS: Laboratory-scale decontamination tests were conducted using bacterial spores of both B. anthracis Ames and Bacillus atrophaeus inoculated onto several types of materials. Pilot-scale tests were also conducted using a larger chamber furnished as an indoor office. Commercial off-the-shelf (COTS) humidifiers filled with aqueous solutions of 3 or 8% hydrogen peroxide (H2 O2 ) were used to generate the HPV inside the mock office...
December 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27497118/effect-of-hydrogen-peroxide-in-combination-with-minimal-thermal-treatment-for-reducing-bacterial-populations-on-cantaloupe-rind-surfaces-and-transfer-to-fresh-cut-pieces
#17
Dike O Ukuku, Sudarsan Mukhopadhyay, David Geveke, Modesto Olanya, Brendan Niemira
Surface structure and biochemical characteristics of bacteria and produce play a major role in how and where bacteria attach, complicating decontamination treatments. Whole cantaloupe rind surfaces were inoculated with Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes at 10(7) CFU/ml. Average population size of Salmonella, Escherichia coli O157:H7, and L. monocytogenes recovered after surface inoculation was 4.8 ± 0.12, 5.1 ± 0.14, and 3.6 ± 0.13 log CFU/cm(2), respectively. Inoculated melons were stored at 5 and 22°C for 7 days before washing treatment interventions...
August 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/27293964/potential-of-biological-agents-in-decontamination-of-agricultural-soil
#18
REVIEW
Muhammad Kashif Javaid, Mehrban Ashiq, Muhammad Tahir
Pesticides are widely used for the control of weeds, diseases, and pests of cultivated plants all over the world, mainly since the period after the Second World War. The use of pesticides is very extensive to control harm of pests all over the globe. Persistent nature of most of the synthetic pesticides causes serious environmental concerns. Decontamination of these hazardous chemicals is very essential. This review paper elaborates the potential of various biological agents in decontamination of agricultural soils...
2016: Scientifica
https://www.readbyqxmd.com/read/27293110/comparison-of-pulsed-corona-plasma-and-pulsed-electric-fields-for-the-decontamination-of-water-containing-legionella-pneumophila-as-model-organism
#19
COMPARATIVE STUDY
Robert Banaschik, Gerhard Burchhardt, Katja Zocher, Sven Hammerschmidt, Juergen F Kolb, Klaus-Dieter Weltmann
Pulsed corona plasma and pulsed electric fields were assessed for their capacity to kill Legionella pneumophila in water. Electrical parameters such as in particular dissipated energy were equal for both treatments. This was accomplished by changing the polarity of the applied high voltage pulses in a coaxial electrode geometry resulting in the generation of corona plasma or an electric field. For corona plasma, generated by high voltage pulses with peak voltages of +80kV, Legionella were completely killed, corresponding to a log-reduction of 5...
December 2016: Bioelectrochemistry
https://www.readbyqxmd.com/read/27257798/-no-touch-technologies-for-environmental-decontamination-focus-on-ultraviolet-devices-and-hydrogen-peroxide-systems
#20
David J Weber, Hajime Kanamori, William A Rutala
PURPOSE OF REVIEW: This article reviews 'no touch' methods for disinfection of the contaminated surface environment of hospitalized patients' rooms. The focus is on studies that assessed the effectiveness of ultraviolet (UV) light devices, hydrogen peroxide systems, and self-disinfecting surfaces to reduce healthcare-associated infections (HAIs). RECENT FINDINGS: The contaminated surface environment in hospitals plays an important role in the transmission of several key nosocomial pathogens including methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus spp...
August 2016: Current Opinion in Infectious Diseases
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