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https://www.readbyqxmd.com/read/28822159/-effect-of-sodium-houttuyfonate-in-combination-with-erythromycin-on-luxs-agr-rna%C3%A2-of-staphylococus-epidermidis
#1
Gan-Fei Xu, Jing-Jing Wang, Da-Qiang Wu, Yan Guan
Quorum sensing of bacteria and its specific gene expression regulation have a very important role in bacterial biofilm formation. LuxS and agr are the key regulatory genes in quorum sensing of Staphylococcus epidermidis, and RNA Ⅲ is the effector molecule of agr system. In order to evaluate the effects of sodium houttuyfonate in combination with erythromycin on the transcription level of S. epidermidis, serial dilution method was used to determine the MIC of sodium houttuyfonate, erythromycin and vancomycin on S...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28815239/-elimination-of-entercoccus-faecalis-with-different-disinfection-methods-in-root-canals-in-vitro
#2
Chu-Wen Sun, Ya-Qin Zhu
PURPOSE: To compare the elimination effect against E.faecalis in root canals with different methods. METHODS: Fifty extracted premolars with single root canal were selected. After cleaning and autoclaving, they were contaminated by E.faecalis and incubated for 28 days as models. Then the models were randomly and equally divided into 5 groups and treated as below: specimens in group A were treated with saline irrigation, specimens in group B were treated with 3% NaClO irrigation (as positive control), specimens in group C were treated with PUI, specimens in group D were treated with diode laser radiation, specimens in group E were treated with combination of PUI and diode laser radiation...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28801832/simultaneous-measurement-of-total-estradiol-and-testosterone-in-human-serum-by-isotope-dilution-liquid-chromatography-tandem-mass-spectrometry
#3
Hui Zhou, Yuesong Wang, Matthew Gatcombe, Jacob Farris, Julianne C Botelho, Samuel P Caudill, Hubert W Vesper
Reliable measurement of total testosterone and estradiol is critical for their use as biomarkers of hormone-related disorders in patient care and translational research. We developed and validated a mass spectrometry method to simultaneously quantify these analytes in human serum without chemical derivatization. Serum is equilibrated with isotopic internal standards and treated with acidic buffer to release hormones from their binding proteins. Lipids are isolated and polar impurities are removed by two serial liquid-liquid extraction steps...
August 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28800819/estimation-of-the-probability-of-bacterial-population-survival-development-of-a-probability-model-to-describe-the-variability-in-time-to-inactivation-of-salmonella-enterica
#4
Kento Koyama, Hidekazu Hokunan, Mayumi Hasegawa, Shuso Kawamura, Shigenobu Koseki
Despite the development of numerous predictive microbial inactivation models, a model focusing on the variability in time to inactivation for a bacterial population has not been developed. Additionally, an appropriate estimation of the risk of there being any remaining bacterial survivors in foods after the application of an inactivation treatment has not yet been established. Here, Gamma distribution, as a representative probability distribution, was used to estimate the variability in time to inactivation for a bacterial population...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28795889/use-of-an-engineered-honey-to-eradicate-preformed-biofilms-of-important-wound-pathogens-an-in-vitro-study
#5
F D Halstead, M A Webber, B A Oppenheim
OBJECTIVE: We previously reported on the ability of SurgihoneyRO (SHRO), an engineered honey, to prevent biofilm formation in vitro, but data were lacking regarding the activity against preformed biofilms. This study aims to assess whether SHRO has any antibacterial activity against mature, preformed biofilms and whether there is any evidence to support the observed clinical effectiveness when SHRO has been used anecdotally on acute and chronic wounds where biofilm is most likely present...
August 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28771571/optical-sensing-of-anticoagulation-status-towards-point-of-care-coagulation-testing
#6
Diane M Tshikudi, Markandey M Tripathi, Zeinab Hajjarian, Elizabeth M Van Cott, Seemantini K Nadkarni
Anticoagulant overdose is associated with major bleeding complications. Rapid coagulation sensing may ensure safe and accurate anticoagulant dosing and reduce bleeding risk. Here, we report the novel use of Laser Speckle Rheology (LSR) for measuring anticoagulation and haemodilution status in whole blood. In the LSR approach, blood from 12 patients and 4 swine was placed in disposable cartridges and time-varying intensity fluctuations of laser speckle patterns were measured to quantify the viscoelastic modulus during clotting...
2017: PloS One
https://www.readbyqxmd.com/read/28768553/comparative-in-vitro-evaluation-of-contact-activity-of-fluralaner-spinosad-phoxim-propoxur-permethrin-and-deltamethrin-against-the-northern-fowl-mite-ornithonyssus-sylviarum
#7
Bradley A Mullens, Amy C Murillo, Hartmut Zoller, Anja R Heckeroth, Faris Jirjis, Annie Flochlay-Sigognault
BACKGROUND: Northern fowl mites (Ornithonyssus sylviarum) are obligate hematophagous ectoparasites of both feral birds and poultry, particularly chicken layers and breeders. They complete their entire life-cycle on infested birds while feeding on blood. Infestations of O. sylviarum are difficult to control and resistance to some chemical classes of acaricides is a growing concern. The contact susceptibility of O. sylviarum to a new active ingredient, fluralaner, was evaluated, as well as other compounds representative of the main chemical classes commonly used to control poultry mite infestations in Europe and the USA...
August 3, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28767674/versatile-ion-s5xl-sequencer-for-targeted-next-generation-sequencing-of-solid-tumors-in-a-clinical-laboratory
#8
Meenakshi Mehrotra, Dzifa Yawa Duose, Rajesh R Singh, Bedia A Barkoh, Jawad Manekia, Michael A Harmon, Keyur P Patel, Mark J Routbort, L Jeffrey Medeiros, Ignacio I Wistuba, Rajyalakshmi Luthra
BACKGROUND: Next generation sequencing based tumor tissue genotyping involves complex workflow and a relatively longer turnaround time. Semiconductor based next generation platforms varied from low throughput Ion PGM to high throughput Ion Proton and Ion S5XL sequencer. In this study, we compared Ion PGM and Ion Proton, with a new Ion S5XL NGS system for workflow scalability, analytical sensitivity and specificity, turnaround time and sequencing performance in a clinical laboratory. METHODS: Eighteen solid tumor samples positive for various mutations as detected previously by Ion PGM and Ion Proton were selected for study...
2017: PloS One
https://www.readbyqxmd.com/read/28760084/optimal-dilution-of-contrast-medium-for-quantitating-parenchymal-blood-volume-using-a-flat-panel-detector
#9
Takumi Kuriyama, Nobuyuki Sakai, Mikiya Beppu, Chiaki Sakai, Hirotoshi Imamura, Iwao Kojima, Katsuhiro Masago, Nobuyuki Katakami
Objective Similar to perfusion studies after acute ischemic stroke, measuring cerebral blood volume (CBV) via C-arm computed tomography before and after therapeutic interventions may help gauge subsequent revascularization. We tested serial dilutions of intra-arterial injectable contrast medium (CM) to determine the optimal CM concentration for quantifying parenchymal blood volume by flat-panel detector imaging (FD-PBV). Methods CM was diluted via saline power injector, instituting time delays for FD-PBV studies...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28758958/evaluation-of-antioxidant-activity-and-growth-control-properties-of-nonoscale-structure-produced-from-aloe-vera-var-littoralis-extract-on-clinical-isolates-of-salmonella
#10
Reza Ranjbar, Mohammad Arjomandzadegan, Hossein Hosseiny
The aim of the study was to examine antibacterial properties of microemulsion structure produced from Aloe vera var. littoralis extract as a new tool of nanoscale drug-like materials. Aloe vera var. littoralis (A. littoralis) extract was prepared by distillation method. A nonocarrier structure in the microemulsion system was prepared from the extract. Serial concentrations were prepared from 8 mg/mL extract and the nonocarrier containing 0.1 mg/mL pure extract and were evaluated by a disk diffusion method for 35 Salmonella clinical isolates...
July 31, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28758627/natronospira-proteinivora-gen-nov-sp-nov-an-extremely-salt-tolerant-alkaliphilic-gammaproteobacterium-from-hypersaline-soda-lakes
#11
Dimitry Y Sorokin, Ilya V Kublanov, Tatiana V Khijniak
Brine samples from Kulunda Steppe soda lakes (Altai, Russia) were inoculated into a hypersaline alkaline mineral medium with β-keratin (chicken feather) as a substrate. The micro-organisms dominating the enrichment culture were isolated by limiting serial dilution on the same medium with casein as a substrate. The cells of strain BSker1T were motile, curved rods. The strain was an obligately aerobic heterotroph utilizing proteins and peptides as growth substrates. The isolate was an obligate alkaliphile with a pH range for growth from pH 8...
July 31, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28757014/an-in-vitro-model-for-assessing-effective-scrapie-decontamination
#12
K C Gough, C A Baker, B C Maddison
Scrapie infectivity enters the environment via a multiplicity of routes from infected animals. Environmentally associated scrapie persists on farms when infected animals have been removed and is particularly resistant to disinfection. Infectivity within the farm is not adequately removed by current recommended guidelines for farm decontamination. We describe an in vitro method for modelling decontamination, specifically the removal of scrapie prions from the surface of concrete fomites within buildings that have housed scrapie infected animals...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28749955/simultaneous-detection-of-three-pome-fruit-tree-viruses-by-one-step-multiplex-quantitative-rt-pcr
#13
Ioanna Malandraki, Despoina Beris, Ioannis Isaioglou, Antonio Olmos, Christina Varveri, Nikon Vassilakos
A one-step multiplex real-time reverse transcription polymerase chain reaction (RT-qPCR) based on TaqMan probes was developed for the simultaneous detection of Apple mosaic virus (ApMV), Apple stem pitting virus (ASPV) and Apple stem grooving virus (ASGV) in total RNA of pome trees extracted with a CTAB method. The sensitivity of the method was established using in vitro synthesized viral transcripts serially diluted in RNA from healthy, virus-tested (negative) pome trees. The three viruses were simultaneously detected up to a 10-4 dilution of total RNA from a naturally triple-infected apple tree prepared in total RNA of healthy apple tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28747393/improving-validation-methods-for-molecular-diagnostics-application-of-bland-altman-deming-and-simple-linear-regression-analyses-in-assay-comparison-and-evaluation-for-next-generation-sequencing
#14
Maksym Misyura, Mahadeo A Sukhai, Vathany Kulasignam, Tong Zhang, Suzanne Kamel-Reid, Tracy L Stockley
AIMS: A standard approach in test evaluation is to compare results of the assay in validation to results from previously validated methods. For quantitative molecular diagnostic assays, comparison of test values is often performed using simple linear regression and the coefficient of determination (R(2)), using R(2) as the primary metric of assay agreement. However, the use of R(2) alone does not adequately quantify constant or proportional errors required for optimal test evaluation...
July 26, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28741043/comparison-of-near-infrared-imaging-camera-systems-for-intracranial-tumor-detection
#15
Steve S Cho, Ryan Zeh, John T Pierce, Ryan Salinas, Sunil Singhal, John Y K Lee
PURPOSE: Distinguishing neoplasm from normal brain parenchyma intraoperatively is critical for the neurosurgeon. 5-Aminolevulinic acid (5-ALA) has been shown to improve gross total resection and progression-free survival but has limited availability in the USA. Near-infrared (NIR) fluorescence has advantages over visible light fluorescence with greater tissue penetration and reduced background fluorescence. In order to prepare for the increasing number of NIR fluorophores that may be used in molecular imaging trials, we chose to compare a state-of-the-art, neurosurgical microscope (System 1) to one of the commercially available NIR visualization platforms (System 2)...
July 24, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28739301/a-new-pcr-assay-for-the-detection-and-differentiation-of-babesia-canis-and-babesia-vogeli
#16
Giada Annoscia, Maria Stefania Latrofa, Cinzia Cantacessi, Emanuela Olivieri, Maria Teresa Manfredi, Filipe Dantas-Torres, Domenico Otranto
Babesia spp. are globally distributed tick-borne protozoan parasites that infect the red blood cells of a wide range of vertebrate hosts, including humans. Diagnosis of babesiosis is often impeded by the transient presence of the parasites in peripheral blood, as well as by their pleomorphic nature. Given the reports of an expanding and, in some cases, sympatric geographical distribution of Babesia canis and Babesia vogeli in dogs and associated vectors, in Europe, the development of time-efficient and cost-effective diagnostic tools to detect and differentiate these two species is warranted...
July 8, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28733216/sldassay-a-software-package-and-web-tool-for-analyzing-limiting-dilution-assays
#17
Ilana M Trumble, Andrew G Allmon, Nancy M Archin, Joseph Rigdon, Owen Francis, Pedro L Baldoni, Michael G Hudgens
Serial limiting dilution (SLD) assays are used in many areas of infectious disease related research. This paper presents SLDAssay, a free and publicly available R software package and web tool for analyzing data from SLD assays. SLDAssay computes the maximum likelihood estimate (MLE) for the concentration of target cells, with corresponding exact and asymptotic confidence intervals. Exact and asymptotic goodness of fit p-values, and a bias-corrected (BC) MLE are also provided. No other publicly available software currently implements the BC MLE or the exact methods...
July 18, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28733150/seven-new-lignan-glycosides-from-the-branches-of-alangium-kurzii-craib-var-laxifolium
#18
Jie Ren, Yang-Guo Xie, Ying-Ying Huang, Sheng-Lan Zhu, Shi-Kai Yan, Hui-Zi Jin, Wei-Dong Zhang
Seven new lignan glycosides (1-3, 8-10, and 14) and 17 known compounds were isolated from the branches of Alangium kurzii Craib var. laxifolium. Their structures were established by spectroscopic analysis and circular dichroism (CD) and X-ray analysis. The isolated compounds were evaluated for their antibacterial activities against Staphylococcus aureus CI1011, Streptococcus suis CI1608, Salmonella gallinarum CI0912, Enterococcus faecalis CI1304, Aeromonas hydrophila CI1008, Escherichia coli CI151012, Vibrio parahaemolyticus CI150506, Klebsiella pneumoniae CI131216, Pseudomonas aeruginosa CI1011, Staphylococcus epidermidis CI1110, and Streptococcus agalactiae CI1302...
July 19, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28727723/analytical-sensitivity-and-specificity-of-a-loop-mediated-isothermal-amplification-lamp-kit-prototype-for-detection-of-trypanosoma-cruzi-dna-in-human-blood-samples
#19
Susana A Besuschio, Mónica Llano Murcia, Alejandro F Benatar, Severine Monnerat, Israel Cruz, Albert Picado, María de Los Ángeles Curto, Yutaka Kubota, Diana P Wehrendt, Paula Pavia, Yasuyoshi Mori, Concepción Puerta, Joseph M Ndung'u, Alejandro G Schijman
This study aimed to assess analytical parameters of a prototype LAMP kit that was designed for detection of Trypanosoma cruzi DNA in human blood. The prototype is based on the amplification of the highly repetitive satellite sequence of T.cruzi in microtubes containing dried reagents on the inside of the caps. The reaction is carried out at 65°C during 40 minutes. Calcein allows direct detection of amplified products with the naked eye. Inclusivity and selectivity were tested in purified DNA from Trypanosoma cruzi stocks belonging to the six discrete typing units (DTUs), in DNA from other protozoan parasites and in human DNA...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28717311/using-real-time-polymerase-chain-reaction-as-an-alternative-rapid-method-for-enumeration-of-colony-count-in-live-brucella-vaccines
#20
Waleed S Shell, Mahmoud L Sayed, A A Samy, Ghada Mohamed Al-Sadek, Gina Mohamed Mohamed Abd El-Hamid, Abdel Hakam M Ali
AIM: Brucellosis is a major bacterial zoonosis of global importance affecting a range of animal species and man worldwide. It has economic, public health, and bio-risk importance. Control and prevention of animal brucellosis mainly depend on accurate diagnostic tools and implementation of effective and safe animal vaccination program. There are three types of animal Brucella live vaccines - Brucella melitensis Rev-1 vaccine, Brucella abortus S19, and B. abortus RB51. Evaluation of these vaccines depends mainly on enumeration of Brucella viable count...
June 2017: Veterinary World
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