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https://www.readbyqxmd.com/read/29166173/cold-plasma-inactivation-of-salmonella-in-prepackaged-mixed-salads-is-influenced-by-cross-contamination-sequence
#1
Sarah M Hertrich, Glenn Boyd, Joseph Sites, Brendan A Niemira
Customer demand for convenient food products has led to an increased production of prepackaged and ready-to-eat food products. Most of these products rely mainly on surface disinfection and other traditional approaches to ensure shelf life and safety. Novel processing techniques, such as cold plasma, are currently being investigated to enhance the safety and shelf life of prepacked foods. The purpose of this study was to determine the effects of cold plasma corona discharge on the inactivation of Salmonella on prepackaged, tomato-and-lettuce mixed salads...
November 22, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29165147/enterococcus-hirae-biofilm-formation-on-hospital-material-surfaces-and-effect-of-new-biocides
#2
Silvia Di Lodovico, Valentina Cataldi, Emanuela Di Campli, Elisabetta Ancarani, Luigina Cellini, Mara Di Giulio
BACKGROUND: Nowadays, the bacterial contamination in the hospital environment is of particular concern because the hospital-acquired infections (HAIs), also known as nosocomial infections, are responsible for significant morbidity and mortality. This work evaluated the capability of Enterococcus hirae to form biofilm on different surfaces and the action of two biocides on the produced biofilms. METHODS: The biofilm formation of E. hirae ATCC 10541 was studied on polystyrene and stainless steel surfaces through the biomass quantification and the cell viability at 20 and 37 °C...
August 2, 2017: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29163440/nutrient-composition-promotes-switching-between-pellicle-and-bottom-biofilm-in-salmonella
#3
Sonia Paytubi, Cintia Cansado, Cristina Madrid, Carlos Balsalobre
Salmonella is one of the most frequently reported causes of foodborne illness worldwide. Non-typhoidal serovars cause gastroenteritis in humans. Salmonella can grow on surfaces forming biofilms, contributing to its persistence since biofilms are difficult to eradicate due to the high resistance to antimicrobials and disinfectants. It has been described that there are two crucial biofilm promoting factors in Salmonella: curli and cellulose. The expression of both factors is coordinately regulated by the transcriptional regulator CsgD...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29162493/outbreak-of-gentamicin-resistant-meticillin-susceptible-staphlococcus-aureus-on-a-neonatal-unit
#4
Sahar Eldirdiri, Jennifer Lee, Ann Jack, Alison Wright, Alison Findlay, Gabby Phillips
BACKGROUND: This report describes an outbreak of gentamicin-resistant meticillin-resistant Staphylococcus aureus (GR MSSA) which occurred on a 21-bed neonatal unit (NNU) in Ninewells Hospital, Dundee, Scotland. METHODS: An outbreak investigation was triggered by two new GR MSSA isolates from babies admitted directly to the unit who had acquired this organism during their stay. Data on MSSA cases and antibiograms of patient isolates were flagged as an alert and microbiology records trawled to detect previous cases...
November 18, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29162492/field-testing-of-a-novel-color-indicator-added-to-chlorine-solutions-used-for-decontamination-of-surfaces-in-ebola-treatment-units
#5
Jason Kang, Kevin S Tyan, Katherine Jin, Aaron M Kyle
Disinfection with chlorine solution was used in West Africa to prevent transmission of Ebola virus disease. This study surveyed 94 healthcare personnel and community leaders in Liberia and Guinea to assess understanding of disinfection and evaluate feedback on the perceived usefulness of Highlight(®), a new color indicator designed to improve chlorine disinfection procedures. Using a Likert-type scale questionnaire, respondents agreed or strongly agreed (p<0.0001) that Highlight(®) improved coverage of chlorine solution and feelings of confidence...
November 18, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29162291/the-efficacy-of-self-disinfecting-bedrail-covers-in-an-intensive-care-unit
#6
Lisa M Esolen, Lokendra Thakur, Abraham J Layon, Thomas A Fuller, Deni-Jo Harrington, Kunal Jha, Subhashinie Kariyawasam
BACKGROUND: Hospital surfaces are considered important vectors in the spread of nosocomial pathogens. This study evaluated microbial counts on novel antimicrobial bedrail covers over a 2-week period in a critical care environment. METHODS: Disposable bedrail covers (Aionx Inc, Hershey, PA) made of a copper and silver polymer and capable of conducting an imperceptible surface potential, were installed in a case-control manner on a series of occupied intensive care unit beds...
November 19, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/29161662/deiodination-of-iopamidol-by-zero-valent-iron-zvi-enhances-formation-of-iodinated-disinfection-by-products-during-chloramination
#7
Huiyu Dong, Zhimin Qiang, Junfeng Lian, Jin Li, Jianwei Yu, Jiuhui Qu
Iodinated X-ray contrast media (ICM) is considered as one of iodine sources for formation of toxic iodinated disinfection byproducts (I-DBPs) during disinfection. This study investigated transformation of a typical ICM, iopamidol (IPM) by zero valent iron (ZVI) and the effect of transformation on the formation of I-DBPs during chloramination. It was found that the presence of ZVI could deiodinate IPM into I(-) and the transformation of IPM exhibited a pseudo-first-order kinetics. Acidic circumstance, SO4(2-), Cl(-) and monochloramine could promote the transformation of IPM by ZVI, while SiO3(2-) inhibited the transformation of IPM...
November 14, 2017: Water Research
https://www.readbyqxmd.com/read/29160477/efficiency-of-cleaning-and-disinfection-of-surfaces-correlation-between-assessment-methods
#8
Oleci Pereira Frota, Adriano Menis Ferreira, Odanir Garcia Guerra, Marcelo Alessandro Rigotti, Denise de Andrade, Najla Moreira Amaral Borges, Margarete Teresa Gottardo de Almeida
OBJECTIVE: to assess the correlation among the ATP-bioluminescence assay, visual inspection and microbiological culture in monitoring the efficiency of cleaning and disinfection (C&D) of high-touch clinical surfaces (HTCS) in a walk-in emergency care unit. METHOD: a prospective and comparative study was carried out from March to June 2015, in which five HTCS were sampled before and after C&D by means of the three methods. The HTCS were considered dirty when dust, waste, humidity and stains were detected in visual inspection; when ≥2...
November 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/29160362/potential-of-endophytic-fungi-as-biocontrol-agents-of-duponchelia-fovealis-zeller-lepidoptera-crambidae
#9
R F Amatuzzi, N Cardoso, A S Poltronieri, C G Poitevin, P Dalzoto, M A Zawadeneak, I C Pimentel
This study reports the first assessment of endophytic fungi isolated from strawberry leaves and selection of isolates for the control of Duponchelia fovealis, a new pest of strawberries. A total of 400 strawberry leaves of the cultivar 'Albion' were collected in four commercial farms. Leaves were disinfected, cut in fragments, and placed on Petri dishes containing potato dextrose agar media with tetracycline and incubated for 30 days. Following this time, 517 fungal colonies were isolated, and thirteen genera were identified: Cladosporium, Aspergillus, Nigrospora, Fusarium, Trichoderma, Chaetomium, Alternaria, Paecilomyces, Penicillium, Ulocladium, Bipolaris, Diaporthe, and Phoma...
November 9, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29157369/risk-factors-associated-with-the-a2c-resistance-pattern-among-e-coli-isolates-from-broiler-flocks-in-canada
#10
Niamh Caffrey, Omid Nekouei, Sheryl Gow, Agnes Agunos, Sylvia Checkley
The extra-label use of ceftiofur in Canadian hatcheries was cause for concern due to an increased prevalence of ceftiofur resistant Salmonella Heidelberg in chickens and humans in Québec. Due to on-going concerns related to human health the use of ceftiofur was eventually phased out of the poultry production industry in 2014-2015. Simultaneous resistance to amoxicillin-clavulanic acid, ceftiofur and cefoxitin, a pattern known as A2C, caused by the presence of blaCMY-2 has become increasingly prevalent in broiler flocks worldwide...
December 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29156876/the-comparison-of-various-disinfectants-efficacy-on-staphylococcus-aureus-and-pseudomonas-aeruginosa-biofilm-layers
#11
Hatice Köse, Nur Yapar
Background/aim: Because biofilms are resistant to antibiotics and biocides, they usually cause chronic persistent infections, which are arduous to cure and have high mortality and morbidity. Our study aimed to investigate the efficiency of orthophthalaldehyde, peracetic acid, hydrogen peroxide, and sodium hypochlorite on Pseudomonas aeruginosa and Staphylococcus aureus biofilm layers and live microbial cells. Materials and methods: Biofilm layers were determined by crystal violet assay and live microbial cells were determined using a resazurin assay...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29155130/dibromoacetic-acid-induced-cl-ly1-2-9-t-cell-apoptosis-and-activation-of-mapks-signaling-cascades
#12
Xiao-Rong Zhou, Wen-Bo Jiang, Yang-Ting Zhang, Ting-Ting Gong, Shu-Ying Gao
Dibromoacetic acid (DBA), a haloacetic acid by-product of disinfection of drinking water, can cause many adverse effects in test animals, including immunotoxicity. However, the underlying molecular mechanism for the immunomodulatory effects remains unclear. The present study was undertaken to help in defining some potential mechanisms for this type of toxicity. Here, Cl.Ly1+2/-9 T-cells were exposed to varying levels of DBA and then several parameters, including cell survival, apoptosis, changes in mitochondrial potentials, and effects on select kinases (i...
November 15, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29153877/slowly-biodegradable-organic-compounds-impact-the-biostability-of-non-chlorinated-drinking-water-produced-from-surface-water
#13
W A M Hijnen, R Schurer, J A Bahlman, H A M Ketelaars, R Italiaander, A van der Wal, P W J J van der Wielen
It is possible to distribute drinking water without a disinfectant residual when the treated water is biologically stable. The objective of this study was to determine the impact of easily and slowly biodegradable compounds on the biostability of the drinking water at three full-scale production plants which use the same surface water, and on the regrowth conditions in the related distribution systems. Easily biodegradable compounds in the drinking water were determined with AOC-P17/Nox during 2012-2015. Slowly biodegradable organic compounds measured as particulate and/or high-molecular organic carbon (PHMOC), were monitored at the inlet and after the different treatment stages of the three treatments during the same period...
November 6, 2017: Water Research
https://www.readbyqxmd.com/read/29153731/bioactivity-of-photoactivated-functionalized-nanoparticles-assessed-in-lipopolysaccharide-contaminated-root-canals-in%C3%A2-vivo
#14
Annie Shrestha, Shimon Friedman, Calvin D Torneck, Anil Kishen
INTRODUCTION: The persistence of dentin-bound lipopolysaccharides (LPS) in disinfected root canals impedes treatment outcomes of endodontic procedures. This study assessed the effects of photoactivated rose bengal-functionalized chitosan nanoparticles (CSRBnps) on LPS-contaminated root dentin in vivo using an intraosseous implantation model and neotissue formation as a marker. METHODS: Fifty human, 3-mm-long root segments with a 1.2-mm canal lumen were divided into 5 groups (n = 10): group 1, canals not contaminated; group 2, canals contaminated with Pseudomonas aeruginosa LPS; group 3, canals contaminated and disinfected with sodium hypochlorite (NaOCl); group 4, canals contaminated and disinfected with NaOCl and calcium hydroxide; and group 5, canals contaminated and disinfected with NaOCl and CSRBnps (300 μg/mL) with photoactivation (λ = 540 nm, 40 J/cm(2))...
November 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29152215/ozone-therapy-an-overview-of-pharmacodynamics-current-research-and-clinical-utility
#15
REVIEW
Noel L Smith, Anthony L Wilson, Jason Gandhi, Sohrab Vatsia, Sardar Ali Khan
The use of ozone (O3) gas as a therapy in alternative medicine has attracted skepticism due to its unstable molecular structure. However, copious volumes of research have provided evidence that O3's dynamic resonance structures facilitate physiological interactions useful in treating a myriad of pathologies. Specifically, O3 therapy induces moderate oxidative stress when interacting with lipids. This interaction increases endogenous production of antioxidants, local perfusion, and oxygen delivery, as well as enhances immune responses...
July 2017: Medical Gas Research
https://www.readbyqxmd.com/read/29150135/effect-of-different-resin-luting-cements-on-the-marginal-fit-of-lithium-disilicate-pressed-crowns
#16
Radek Mounajjed, Thomas J Salinas, Tomas Ingr, Basel Azar
STATEMENT OF PROBLEM: The vertical marginal discrepancy of restorations can increase upon cementation, and poor marginal fit can lead to cement dissolution, marginal discoloration, microleakage, and secondary caries. The amount of increase is related to the type of luting cement used, but how lithium disilicate pressed crowns are affected by different resin cements is unclear. PURPOSE: The purpose of this in vitro study was to compare the effect of using different resin luting cements on the vertical marginal discrepancy of lithium disilicate pressed crowns...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29149675/evaluation-of-potassium-ferrate-as-an-alternative-disinfectant-on-cyanobacteria-inactivation-and-associated-toxin-fate-in-various-waters
#17
Jiajia Fan, Bo-Hung Lin, Che-Wei Chang, Yuqing Zhang, Tsair-Fuh Lin
Potassium ferrate (K2FeO4) is an effective oxidant that may be used as a pre- or post-oxidant in the purification of source water with cyanobacterial issues. To provide a better basis for the application of this oxidant during water treatment processes, the impacts of K2FeO4 on the cell viability of Microcystis aeruginosa and the fate of associated microcystins (MCs) were investigated in various water matrices. The results showed that a water matrix can significantly affect the effectiveness of K2FeO4 on cyanobacteria inactivation...
November 9, 2017: Water Research
https://www.readbyqxmd.com/read/29149558/quantification-of-humic-substances-in-natural-water-using-nitrogen-doped-carbon-dots
#18
Yan-Fang Guan, Bao-Cheng Huang, Chen Qian, Han-Qing Yu
Dissolved organic matter (DOM) is ubiquitous in aqueous environments and plays a significant role in pollutant mitigation, transformation and organic geochemical circulation. DOM is also capable of forming carcinogenic by-products in the disinfection treatment processes of drinking water. Thus, efficient methods for DOM quantification are highly desired. In this work, a novel sensor for rapid and selective detection of humic substances (HS), a key component of DOM, based on fluorescence quenching of nitrogen-doped carbon quantum dots was developed...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29149432/ebola-in-the-netherlands-2014-2015-costs-of-preparedness-and-response
#19
Anita W M Suijkerbuijk, Corien M Swaan, Marie-Josee J Mangen, Johan J Polder, Aura Timen, Wilhelmina L M Ruijs
The recent epidemic of Ebola virus disease (EVD) resulted in countries worldwide to prepare for the possibility of having an EVD patient. In this study, we estimate the costs of Ebola preparedness and response borne by the Dutch health system. An activity-based costing method was used, in which the cost of staff time spent in preparedness and response activities was calculated based on a time-recording system and interviews with key professionals at the healthcare organizations involved. In addition, the organizations provided cost information on patient days of hospitalization, laboratory tests, personal protective equipment (PPE), as well as the additional cleaning and disinfection required...
November 17, 2017: European Journal of Health Economics: HEPAC: Health Economics in Prevention and Care
https://www.readbyqxmd.com/read/29148923/ames-and-random-amplified-polymorphic-dna-tests-for-the-validation-of-the-mutagenic-and-or-genotoxic-potential-of-the-drinking-water-disinfection-by-products-chloroform-and-bromoform
#20
Messaouda Khallef, Süleyman Cenkci, Dilek Akyil, Arzu Özkara, Muhsin Konuk, Djamel Eddine Benouareth
Chloroform and Bromoform are two abundant trihalomethanes found in Algerian drinking water. The investigation of the mutagenic hazard of these disinfection by-products was studied by Ames test as prokaryotic bioassay to show their mutagenic effects. For this, Salmonella typhimurium TA98 and TA100 strains were employed. Both chloroform and bromoform showed a direct mutagenic effect since the number of revertant colonies gradually increase in dose-dependent manner with all concentrations tested with the two bacterial strains and these were both in the absence and presence of S9 metabolic activation...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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