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Massimo Del Fabbro, Stefano Corbella, Patrick Sequeira-Byron, Igor Tsesis, Eyal Rosen, Alessandra Lolato, Silvio Taschieri
BACKGROUND: When primary root canal therapy fails, periapical lesions can be retreated with or without surgery. Root canal retreatment is a non-surgical procedure that involves removal of root canal filling materials from the tooth, followed by cleaning, shaping and obturating of the canals. Root-end resection is a surgical procedure that involves exposure of the periapical lesion through an osteotomy, surgical removal of the lesion, removal of part of the root-end tip, disinfection and, commonly, retrograde sealing or filling of the apical portion of the remaining root canal...
October 19, 2016: Cochrane Database of Systematic Reviews
Jonathan B Gillespie, Michelle Maclean, Martin J Given, Mark P Wilson, Martin D Judd, Igor V Timoshkin, Scott J MacGregor
OBJECTIVE: This study investigates possible advantages in pulsed over continuous 405-nm light-emitting diode (LED) light for bacterial inactivation and energy efficiency. BACKGROUND: Alternative nonantibiotic methods of disinfection and infection control have become of significant interest. Recent studies have demonstrated the application of systems using 405-nm LEDs for continuous disinfection of the clinical environment, and also for potential treatment of contaminated wounds...
October 19, 2016: Photomedicine and Laser Surgery
Alondra Escudero-Castellanos, Blanca E Ocampo-García, Ma Victoria Domínguez-García, Jaime Flores-Estrada, Miriam V Flores-Merino
Hydrogels are suitable materials to promote cell proliferation and tissue support because of their hydrophilic nature, porous structure and sticky properties. However, hydrogel synthesis involves the addition of additives that can increase the risk of inducing cytotoxicity. Sterilization is a critical process for hydrogel clinical use as a proper scaffold for tissue engineering. In this study, poly(ethylene glycol) (PEG), poly(ethylene glycol)-chitosan (PEG-CH) and multi-arm PEG hydrogels were synthesized by free radical polymerization and sterilized by gamma irradiation or disinfected using 70 % ethanol...
December 2016: Journal of Materials Science. Materials in Medicine
Tingting Wu, James D Englehardt
An urban net-zero water treatment system, designed for energy-positive water management, 100% recycle of comingled black/grey water to drinking water standards, and mineralization of hormones and other organics, without production of concentrate, was constructed and operated for two years, serving an occupied four-bedroom, four-bath university residence hall apartment. The system comprised septic tank, denitrifying membrane bioreactor (MBR), iron-mediated aeration (IMA) reactor, vacuum ultrafilter, and peroxone or UV/H2O2 advanced oxidation, with 14% rainwater make-up and concomitant discharge of 14% of treated water (ultimately for reuse in irrigation)...
October 5, 2016: Water Research
Nicole L McLellan, Hung Lee, Marc B Habash
Standardized and rapid assays for viable viral pathogens are needed to inform human health risk assessments. Conventional qPCR is designed to enumerate the gene copies of an organism in a sample, but does not identify those that originated from a viable pathogen. This study was undertaken to evaluate modified qPCR methods as infectivity assays for the enumeration of infectious MS2 coliphage. Propidium monoazide (PMA) treatment coupled with long-amplicon qPCR assays were assessed for their ability to quantify infectious MS2 in pure cultures and following inactivation by a range of UV light exposures and chlorine doses...
October 12, 2016: Journal of Virological Methods
Maryam Pourhajibagher, Nasim Chiniforush, Roghayeh Ghorbanzadeh, Abbas Bahador
BACKGROUND: Photo-activated disinfection (PAD) is a novel treatment approach, in which bacteria in the root canal system may be exposed to sub-lethal doses of PAD. Such exposure can affect bacterial survival and virulence features, such as biofilm formation ability. The aim of this study was to evaluate the effects of sub-lethal doses of PAD (sPAD) using indocyanine green (ICG) on load and biofilm formation ability of Porphyromonas gingivalis as an anaerobic bacterium associated with endodontic infection...
October 12, 2016: Photodiagnosis and Photodynamic Therapy
Erkut Turan, Ozay Gules, Figen Sevil Kilimci, Mehmet Erkut Kara, Omer Gurkan Dilek, Seyyid Said Sabanci, Musa Tatar
The present study investigates the efficiency of liquid foam soap, ethanol, citric acid and benzalkonium chloride as a fixative-preservative solution (a soap-and ethanol-based fixing solution, or SEFS). In this study, ethanol serves as the fixative and preservative, liquid foam soap as the modifying agent, citric acid as the antioxidant and benzalkonium chloride as the disinfectant. The goat cadavers perfused with SEFS (n=8) were evaluated over a period of one year with respect to hardness, colour and odour using objective methods...
October 12, 2016: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
Lisa M Li, Titus Wong, Emily Rose, Graham Wickham, Elizabeth Bryce
BACKGROUND: A tabletop-type ultraviolet C (UVC) light-emitting disinfecting device was evaluated for microbiologic effectiveness, safety, usability, and end-user satisfaction. METHODS: Three different inoculums of methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and Acinetobacter calcoaceticus-baumannii complex strains suspended in both saline and trypticase soy broth were applied onto stainless steel carriers and electronic device surfaces in triplicate and cultured for growth after UVC disinfection...
October 11, 2016: American Journal of Infection Control
Akosua Sarpong Boakye-Ansah, Giuliana Ferrero, Maria Rusca, Pieter van der Zaag
Over past decades strategies for improving access to drinking water in cities of the Global South have mainly focused on increasing coverage, while water quality has often been overlooked. This paper focuses on drinking water quality in the centralized water supply network of Lilongwe, the capital of Malawi. It shows how microbial contamination of drinking water is unequally distributed to consumers in low-income (unplanned areas) and higher-income neighbourhoods (planned areas). Microbial contamination and residual disinfectant concentration were measured in 170 water samples collected from in-house taps in high-income areas and from kiosks and water storage facilities in low-income areas between November 2014 and January 2015...
October 2016: Journal of Water and Health
John Moat, Athanasios Rizoulis, Graeme Fox, Mathew Upton
The domestic environment can be a source of pathogenic bacteria. We show here that domestic shower hoses may harbour potentially pathogenic bacteria and fungi. Well-developed biofilms were physically removed from the internal surface of shower hoses collected in four locations in England and Scotland. Amplicon pyrosequencing of 16S and 18S rRNA targets revealed the presence of common aquatic and environmental bacteria, including members of the Actinobacteria, Alphaproteobacteria, Bacteroidetes and non-tuberculous Mycobacteria...
October 2016: Journal of Water and Health
Ali Kal, Mustafa Ilker Toker, Serpil Kaya
PURPOSE: The aim of this study was to compare the effects of widely used multipurpose contact lens solutions against Staphylococcus aureus and Pseudomonas aeruginosa, in addition to cystic and trophozoite forms of Acanthamoeba castellanii and A. polyphaga, that cause microbial keratitis. METHODS: Three multipurpose solutions were tested: SOLO-care, ReNu, and Opti-Free Express. The test solutions were challenged with P. aeruginosa (ATCC 27853) and S. aureus (ATCC 2913) based on the ISO stand-alone and regiment test procedure for disinfecting products, A...
October 13, 2016: International Ophthalmology
Irene Degli Agosti, Elena Ginelli, Bruno Mazzacane, Gabriella Peroni, Sandra Bianco, Fabio Guerriero, Giovanni Ricevuti, Simone Perna, Mariangela Rondanelli
Introduction. A number of studies suggest that oxygen-ozone therapy may have a role in the treatment of chronic, nonhealing, or ischemic wounds for its disinfectant and antibacterial properties. Nonhealing wounds are a significant cause of morbidity. Here we present a case of subcutaneous oxygen-ozone therapy used to treat a nonhealing postoperative wound in a young man during a period of 5 weeks. Case Presentation. A 46-year-old man had a motorcycle accident and underwent amputation of the right tibia and fibula...
2016: Case Reports in Medicine
Tynisha M Koenigsaecker, Jonathan A Eisen, David A Coil
Here, we present the draft genome of Gordonia sp. strain UCD-TK1. The assembly contains 5,470,576 bp in 98 contigs. This strain was isolated from a disinfected ambulatory surgery center.
October 13, 2016: Genome Announcements
Stephania Caroline Rodolfo Silva, Aion Mangino Messias, Filipe de Oliveira Abi-Rached, Raphael Freitas de Souza, José Maurício Dos Santos Nunes Reis
This study evaluated the accuracy of gypsum casts after different impression techniques and double pouring. Ten patients were selected and for each one it was obtained 5 partial putty/wash impressions with vinyl polysiloxane (VPS) material from teeth #13 to #16 with partial metal stock trays. The following techniques were performed: (1) one-step; two-step relief with: (2) PVC film; (3) slow-speed tungsten carbide bur and scalpel blade, (4) small movements of the tray and (5) without relief-negative control...
2016: PloS One
Gonza Namulanda, Michele M Monti, Prakash Mulay, Sheila Higgins, Michelle Lackovic, Abby Schwartz, Joanne Bonnar Prado, Justin Waltz, Yvette Mitchell, Geoffrey M Calvert
CDC's National Institute for Occupational Safety and Health (NIOSH) collects data on acute pesticide-related illness and injury reported by 12 states (California, Florida, Iowa, Louisiana, Michigan, North Carolina, Nebraska, New Mexico, New York, Oregon, Texas, and Washington). This report summarizes the data on illnesses and injuries arising from nonoccupational exposure to conventional pesticides that were reported during 2007-2011. Conventional pesticides include insecticides, herbicides, fungicides, and fumigants...
October 14, 2016: MMWR. Morbidity and Mortality Weekly Report
Fatemeh Arabkhazaeli, Seyed Ahmad Madani, Samare Ghavami
Mortalities in a flock of canaries ( Serinus canaria ) with respiratory acariasis, pododermatitis caused by Staphylococcus aureus , and macrorhabdosis were investigated by postmortem examination. After a thorough parasitologic study, the tracheal mites were identified as Ptilonyssus morofskyi. Cleaning and disinfection of cages and perches, ivermectin application on the cervical skin of individual birds, enrofloxacin medication, and drinking water acidification with vinegar were used to control mortality. To the best of our knowledge, this is the first report of the occurrence of Ptilonyssus species in captive passerine birds...
September 2016: Journal of Avian Medicine and Surgery
Mina Ha, Soon Young Lee, Seung-Sik Hwang, Hyesook Park, Seungsoo Sheen, Hae Kwan Cheong, Bo Youl Choi
OBJECTIVES: As of November 2011, the Korean government recalled and banned humidifier disinfectants (HDs) from the market, because four case-control studies and one retrospective epidemiological study proved the association between HDs and lung injury of unknown cause. The report reviewed the causal role of HDs in lung injury based on scientific evidences. METHODS: A careful examination on the association between the HDs and lung injury was based on the criteria of causality inference by Hill and the US Surgeon General Expert Committee...
2016: Epidemiology and Health
Won-Young Kim, Soonyoung Park, Hwa Jung Kim, Eun Jin Chae, Kyung-Hyun Do, Jin Won Huh, Chae-Man Lim, Younsuck Koh, Sang-Bum Hong
BACKGROUND AND OBJECTIVE: Inhalation exposure to household chemicals can result in serious health problems, although the long-term outcomes are unclear. We evaluated the changes in lung function after home humidifier disinfectant (HD) exposure. METHODS: This post hoc analysis of a prospective nationwide cohort involved patients with inhalation lung injury due to HD. Patients underwent spirometric measurements at onset and annually thereafter. RESULTS: Forty subjects met the eligibility criteria...
October 12, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
K J Hornig, B A Burgess, N T Saklou, V Johnson, A Malmlov, D C Van Metre, P S Morley, S R Byers
BACKGROUND: Infection control is critical to providing high-quality patient care. Many veterinary teaching hospitals (VTHs) utilize footbaths or footmats at entrances and key control points throughout the facility to decrease trafficking of pathogenic microorganism on contaminated footwear. HYPOTHESIS/OBJECTIVES: To compare efficacy of 4 disinfectants used in footmats for decreasing bacterial contamination of footwear in a large animal hospital. ANIMALS: A single adult dairy cow was housed in a stall for 4 days to facilitate stall contamination with fecal material...
October 12, 2016: Journal of Veterinary Internal Medicine
Sidra Ishaq, Muhammad Adil Rasheed, Muhammad Ashraf, Imran Altaf, Saima Rehmat, Ghulam Fatima
Disinfectants are chemical agents used to eradicate, deactivate or kill microorganisms. Chemical disinfectants especially chlorine compound are extensively used for water sanitization. Among these calcium hypochlorite and chloramines are commonly used now a day. Large number of chemical compounds, drugs and endogenous substances are metabolized by hepatic enzymes known as cytochrome P450 enzyme system. Many chemicals are capable of enzyme induction. Enzyme induction may change the metabolism of other drugs and endogenous substances which may alter the plasma concentration of these chemicals...
September 2016: Pakistan Journal of Pharmaceutical Sciences
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