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Sterilization and disinfection

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https://www.readbyqxmd.com/read/29135999/-life-like-assessment-of-antimicrobial-surfaces-by-a-new-touch-transfer-assay-displays-strong-superiority-of-a-copper-alloy-compared-to-silver-containing-surfaces
#1
Johannes Karl-Mark Knobloch, Sabrina Tofern, Wladimir Kunz, Sara Schütze, Michael Riecke, Werner Solbach, Thomas Wuske
Transmission of bacteria from inanimate surfaces in healthcare associated environments is an important source of hospital acquired infections. A number of commercially available medical devices promise to fulfill antibacterial activity to reduce environmental contamination. In this study we developed a touch transfer assay modeling fingerprint transmission to investigate the antibacterial activity of surfaces, with confirmed antibacterial activity by a modified ISO 22196 (JIS Z 2801) assay to test such surfaces under more realistic conditions...
2017: PloS One
https://www.readbyqxmd.com/read/29135009/bacterial-species-identifiable-magnetic-nanosystems-for-early-sepsis-diagnosis-and-extracorporeal-photodynamic-blood-disinfection
#2
Jianhao Wang, Hao Wu, Yanmei Yang, Rong Yan, Yuan Zhao, Yanhao Wang, Aihong Chen, Shilong Shao, Pengju Jiang, Yong-Qiang Li
Despite the numerous bacteria detection and elimination techniques available nowadays, sensitive diagnosis and treatment of sepsis (caused by the presence of bacteria in the bloodstream), especially at the early stage, remain big challenges. Here we report a nanosystem for early sepsis diagnosis and complete extracorporeal blood disinfection, based on iron oxide magnetic nanoparticles functionalized with chlorin e6 molecules and bacterial species-identifiable aptamers (Fe3O4-Ce6-Apt). We demonstrate that the Fe3O4-Ce6-Apt nanosystem can achieve simultaneous blood bacterial species identification and enrichment in a single step, and the enriched bacteria can be easily detected with the assistance of fluorescence microscopic determination...
November 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/29071021/the-effect-of-er-yag-laser-on-entroccocus-faecalis-bacterium-in-the-pulpectomy-of-anterior-primary-teeth
#3
Zahra Bahrololoomi, Farkhondeh Poursina, Reza Birang, Elnaz Foroughi, Hazhir Yousefshahi
Introduction: Successful root canal therapy depends on the complete elimination of microorganisms such as Entroccocus faecalis, which is impossible to achieve with the traditional methods. Lasers are recently introduced as a new method to solve the problem. The present study is planned and performed to examining the antibacterial effect of Er: YAG laser. Methods: Sixty extracted anterior primary teeth were prepared and sterilized. E. faecalis bacterium was cultured in canals. Samples were randomly divided into two groups...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29069144/effect-of-ultrasound-streaming-on-the-disinfection-of-flattened-root-canals-prepared-by-rotary-and-reciprocating-systems
#4
Layla Reginna Silva Munhoz de Vasconcelos, Raquel Zanin Midena, Paloma Gagliardi Minotti, Thais Cristina Pereira, Marco Antonio Hungaro Duarte, Flaviana Bombarda de Andrade
New technical and scientific developments have been advocated to promote the success of the endodontic treatment. In addition to rotary and reciprocating systems, irrigating solution agitation has been suggested and passive ultrasonic irrigation (PUI) is the most used. OBJECTIVE: To evaluate, in vitro, the effect of ultrasound streaming (US) in the disinfection of flattened root canal systems prepared by the ProTaper, BioRaCe and Reciproc systems, utilizing the microbiological culture...
September 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29061869/infection-prevention-and-control-in-pediatric-ambulatory-settings
#5
REVIEW
Mobeen H Rathore, Mary Anne Jackson
Since the American Academy of Pediatrics published its statement titled "Infection Prevention and Control in Pediatric Ambulatory Settings" in 2007, there have been significant changes that prompted this updated statement. Infection prevention and control is an integral part of pediatric practice in ambulatory medical settings as well as in hospitals. Infection prevention and control practices should begin at the time the ambulatory visit is scheduled. All health care personnel should be educated regarding the routes of transmission and techniques used to prevent the transmission of infectious agents...
November 2017: Pediatrics
https://www.readbyqxmd.com/read/29039228/evaluation-of-the-respiratory-tract-toxicity-of-ortho-phthalaldehyde-a-proposed-alternative-for-the-chemical-disinfectant-glutaraldehyde
#6
Natasha R Catlin, Cynthia J Willson, Matthew Stout, Grace E Kissling, Suramya Waidyanatha, Gregory L Baker, Barry K Hayden, Michael Wyde
ortho-Phthalaldehyde (OPA) is a high-level chemical disinfectant that is commonly used for chemical sterilization of dental and medical instruments as an alternative to glutaraldehyde, a known skin and respiratory sensitizer. Concern for safe levels of human exposure remains due to a lack of toxicity data as well as human case reports of skin and respiratory sensitization following OPA exposure. The present study evaluated the inhalational toxicity of OPA in Harlan Sprague-Dawley rats and B6C3F1/N mice. Groups of 10 male and female rats and mice were exposed to OPA by whole-body inhalation for 3 months at concentrations of 0 (control), 0...
August 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29025320/efficacy-of-itraconazole-oral-solution-using-an-alternating-week-pulse-therapy-regimen-for-treatment-of-cats-with-experimental-microsporum-canis-infection
#7
Christopher Puls, Aaron Johnson, Karrie Young, Jonathan Hare, Kelly Rosenkrans, Lisa Young, Karen Moriello
Objectives The objective of this study was to evaluate itraconazole 10 mg/ml oral solution for the treatment of Microsporum canis infection using an alternating-week pulse therapy regimen in a controlled laboratory setting. Methods Eighty cats with experimentally induced infections were randomly assigned to treatment (itraconazole vs control [sterile water]), administered 5 mg/kg orally once daily for 1 week on alternate weeks for 5 weeks, followed by a 4 week follow-up period. Topical therapeutic treatment was not administered...
October 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28919336/staphylococcus-aureus-dry-surface-biofilms-are-more-resistant-to-heat-treatment-than-traditional-hydrated-biofilms
#8
A Almatroudi, S Tahir, H Hu, D Chowdhury, I B Gosbell, S O Jensen, G S Whiteley, A K Deva, T Glasbey, K Vickery
BACKGROUND: The importance of biofilms to clinical practice is being increasingly realised. Biofilm tolerance to antibiotics is well described but limited work has been conducted on the efficacy of heat disinfection and sterilization against biofilms. AIM: To test the susceptibility of planktonic, hydrated biofilm and dry-surface biofilm forms of Staphylococcus aureus, to dry heat and wet heat treatments. METHODS: S. aureus was grown as both hydrated biofilm and dry-surface biofilm in the CDC biofilm generator...
September 14, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28918989/improper-positioning-of-the-elevator-lever-of-duodenoscopes-may-lead-to-sequestered-bacteria-that-survive-disinfection-by-automated-endoscope-reprocessors
#9
Michelle J Alfa, Harminder Singh, Donald R Duerksen, Gale Schultz, Carol Reidy, Pat DeGagne, Nancy Olson
BACKGROUND: Some outbreaks associated with contaminated duodenoscopes have been attributed to biofilm formation. The objective of this study was to determine whether bacteria within an organic matrix could survive if the elevator lever was improperly positioned in the automated endoscope reprocessor (AER) after 1 round of reprocessing. METHODS: Duodenoscope lever cavities with an open or sealed elevator wire channel were inoculated with 6-7 Log10 of both Escherichia coli and Enterococcus faecalis in ATS2015 (Healthmark Industries, Fraser, MI) and dried for 2 hours...
September 14, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28906501/impact-of-cleaning-procedures-on-adhesion-of-living-cells-to-three-abutment-materials
#10
Christian Mehl, Matthias Kern, Anna Zimmermann, Sönke Harder, Steven Huth, Christine Selhuber-Unkel
PURPOSE: To test the adhesion properties of live gingival fibroblasts to three different implant abutment materials after five different cleaning procedures. MATERIALS AND METHODS: Highly polished discs of lithium disilicate (LS), zirconium dioxide (Zr), and titanium alloy (Ti) were fabricated. The specimens were cleaned by one of five different methods: steam (S), argon plasma (AP), ultrasound and disinfection (UD), ultrasound and sterilization in an autoclave (UA), or photofunctionalization with high-intensity ultraviolet light (PF)...
September 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28892888/role-of-herbal-agents-tea-tree-oil-and-aloe-vera-as-cavity-disinfectant-adjuncts-in-minimally-invasive-dentistry-an-in-vivo-comparative-study
#11
Gaurav Patri, Aliva Sahu
INTRODUCTION: The prevention and control of caries necessitates the elimination of cariogenic bacteria and cavity disinfectants have proved to play a major role in achieving the goal. The use of phytotherapy is trending and many natural products have shown anti-microbial properties which can be used as cavity disinfectant in the field of dentistry. AIM: The aim of this study was to compare the efficacy of herbal antibacterial agents (Tea Tree Oil (TTO) and Aloe vera) with commercially available 2% chlorhexidine (CHX) as cavity disinfectant for use in minimally invasive dentistry...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28865936/effectiveness-of-a-shielded-ultraviolet-c-air-disinfection-system-in-an-inpatient-pharmacy-of-a-tertiary-care-children-s-hospital
#12
Don Guimera, Jean Trzil, Joy Joyner, Nicholas D Hysmith
Viable air particles pose a risk in areas where sterile preparations are compounded. This study investigated the efficacy of an innovative air purification technology that uses a shielded ultraviolet C light lamp to continuously purify the air in an inpatient pharmacy. Mean airborne fungal and bacterial colony forming units were obtained preinstallation and again in 6 months. A statistically significant decrease of 78% and 62% was observed for fungal and bacterial particles, respectively. This study demonstrates a potential role for this novel technology in decreasing the spread of airborne pathogens...
August 30, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28855761/effect-of-conventional-irrigation-and-photoactivated-disinfection-on-enterococcus-faecalis-in-root-canals-an-in-vitro-study
#13
Niyati Balakrishna, Prashant Moogi, G Vinay Kumar, B R Prashanth, Nithin Kumar Shetty, Kaushal R Rao
AIMS: A study was done to evaluate the antimicrobial efficacy of sodium hypochlorite (NaOCl) and photoactivated disinfection (PAD) on Enterococcus faecalis. SETTINGS AND DESIGN: Random sampling, in-vitro study. SUBJECTS AND METHODS: Access opening and biomechanical preparation were performed on fifty freshly extracted mandibular second premolars. The specimens were sterilized; 15 μm of E. faecalis was inoculated into each canal and incubated at 36°C for 24 h...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28818480/-infection-control-practices-while-performing-prostate-biopsies-in-france-a-ciafu-survey
#14
P Leduc, J D Doublet, F Bruyère, S Malavaud
In 2008, the French Public Health Committee admitted that associating ultrasound probe protection, and related precautions, and low-level disinfection would be equivalent to the intermediate level disinfection. In 2010, the French Urology Association (AFU) updated guidelines regarding trans-rectal prostate biopsies, namely preventive measures related to cross-transmission of infections. We report an evaluation of compliance to them, driven in 2016 by AFU's infection committee. Although not recommended, almost one third of the urologists still perform biopsies under general anesthesia, and two thirds of them ask for a urine culture before biopsies...
August 14, 2017: Progrès en Urologie
https://www.readbyqxmd.com/read/28756961/efficacy-of-photon-induced-photoacoustic-streaming-in-the-reduction-of-enterococcus-faecalis-within-the-root-canal-different-settings-and-different-sodium-hypochlorite-concentrations
#15
Barbara Skrlj Golob, Giovanni Olivi, Mirijam Vrabec, Rita El Feghali, Steven Parker, Stefano Benedicenti
INTRODUCTION: The purpose of this study was to determine the effectiveness of laser-activated irrigation by photon-induced photoacoustic streaming (PIPS) in the reduction of Enterococcus faecalis in root canal disinfection, varying laser energy output, and sodium hypochlorite (NaOCl) concentration. For effective removal of the smear layer, the sequence and resting time of the final irrigation steps were modified compared with the standard PIPS protocol. METHODS: Eighty-six extracted single-rooted teeth were mechanically prepared, sterilized, and inoculated with E...
October 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28753701/reprocessing-of-single-use-endoscopic-variceal-band-ligation-devices-a-pilot-study
#16
Kavel Visrodia, Abdul Haseeb, Yuri Hanada, Kelly M Pennington, Magdalen Clemens, Paul J Pearce, Pritish K Tosh, Bret T Petersen, Mark D Topazian
Background and study aims The preferred management of bleeding esophageal varices includes endoscopic band ligation. Endoscopic ligation devices (ELDs) are expensive and designed for single use, limiting their uptake in developing countries. We aimed to assess the efficacy of reprocessing ELDs using terminal microbial cultures and adenosine triphosphate (ATP) testing. Materials and methods ELDs were recovered after clinical use and their components (cap, handle, and cord) were subjected to reprocessing...
July 28, 2017: Endoscopy
https://www.readbyqxmd.com/read/28752736/influence-of-skin-disinfection-prior-removal-of-perineural-catheter-on-bacterial-colonization-contamination-and-local-inflammation-a-prospective-randomized-study
#17
Stephan Blumenthal, Reinhard Zbinden, Sascha Mandic, Christoph A Rüst, José Aguirre, Alain Borgeat
BACKGROUND: There is a wide variation of perineural catheter (PNC) colonization rates in the literature. The impact of skin disinfection on PNC colonization and inflammation is not clear. The objective of this prospective, randomized clinical study was to investigate the influence of alcoholic skin disinfection before PNC removal on the detection of bacteria on PNC. METHODS: Two hundred patients receiving a PNC for orthopaedic surgery were random- ized to receive (with-group) or not (without-group) a skin disinfection with a sprayed alcoholic solution before removal of the PNC...
July 28, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28740247/inactivation-mechanism-of-escherichia-coli-induced-by-slightly-acidic-electrolyzed-water
#18
Zhangying Ye, Shuo Wang, Tao Chen, Weishan Gao, Songming Zhu, Jinsong He, Zhiying Han
Foodborne disease outbreak caused by food microbiological contamination is a serious public health problem. Slightly acidic electrolyzed water (SAEW), a new ultra-high effect and wide-spectrum disinfectant that is colourless, odourless, and harmless to humans and the environment, is directly used on food surfaces in Japan and America. However, the underlying inactivation mechanism remains unknown. In this study, biochemical and cellular changes were observed to investigate the bactericidal mechanism of SAEW against Escherichia coli (E...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727911/ultrasound-processing-of-liquid-system-s-and-its-antimicrobial-mechanism-of-action
#19
D Spiteri, C Chot-Plassot, J Sclear, K A Karatzas, C Scerri, V P Valdramidis
Ultrasound creates cavitation phenomena, resulting in the formation of several free radicals, namely OH˙ and H˙, due to the breakdown of the H2 O molecule. These radicals affect the cellular integrity of the bacteria, causing the inactivation of several processes, and thus it is important to unravel the mechanism of action of this technology. This research looks into the application and mechanism of action of ultrasound technology as a means of disinfection by acoustic cavitation. Sterile water and synthetic waste water were inoculated with different mutants of Escherichia coli K12 strains containing deletions in genes affecting specific functional properties of E...
July 20, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28722122/wet-work-exposure-and-hand-eczema-among-healthcare-workers-a-cross-sectional-study
#20
N Hamnerius, C Svedman, O Bergendorff, J Björk, M Bruze, A Pontén
BACKGROUND: Hand eczema is more common in healthcare workers compared to the general population. The hands are subject to changing occupational exposures due to mandatory hygiene regulations for health care workers. OBJECTIVES: To describe the exposure due to hygiene procedures and investigate the associations between occupational hand washing, use of non-sterile gloves, and hand disinfectant and self-reported hand eczema. METHODS: Cross-sectional study with an electronic questionnaire distributed to 28 762 hospital employees in southern Sweden...
July 19, 2017: British Journal of Dermatology
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