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Laboratory quality

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https://www.readbyqxmd.com/read/29036605/survey-of-laboratory-practices-for-diagnosis-of-fungal-infection-in-seven-asian-countries-an-asia-fungal-working-group-afwg-initiative
#1
Ariya Chindamporn, Arunaloke Chakrabarti, Ruoyu Li, Pei-Lun Sun, Ban-Hock Tan, Mitzi Chua, Retno Wahyuningsih, Atul Patel, Zhengyin Liu, Yee-Chun Chen, Methee Chayakulkeeree
An online survey of mycology laboratories in seven Asian countries was conducted to assess the status, competence, and services available. Country representatives from the Asia Fungal Working Group (AFWG) contacted as many laboratories performing mycology diagnosis as possible in their respective countries, requesting that the laboratory heads complete the online survey. In total, 241 laboratories responded, including 71 in China, 104 in India, 11 in Indonesia, 26 in the Philippines, four in Singapore, 18 in Taiwan, and seven in Thailand...
September 20, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29036167/development-and-validation-of-a-protocol-for-optimizing-the-use-of-paraffin-blocks-in-molecular-epidemiological-studies-the-example-from-the-hpv-ahead-study
#2
Marisa Mena, Belen Lloveras, Sara Tous, Johannes Bogers, Fausto Maffini, Nitin Gangane, Rekha Vijay Kumar, Thara Somanathan, Eric Lucas, Devasena Anantharaman, Tarik Gheit, Xavier Castellsagué, Michael Pawlita, Silvia de Sanjosé, Laia Alemany, Massimo Tommasino
Worldwide use of formalin-fixed paraffin-embedded blocks (FFPE) is extensive in diagnosis and research. Yet, there is a lack of optimized/standardized protocols to process the blocks and verify the quality and presence of the targeted tissue. In the context of an international study on head and neck cancer (HNC)-HPV-AHEAD, a standardized protocol for optimizing the use of FFPEs in molecular epidemiology was developed and validated. First, a protocol for sectioning the FFPE was developed to prevent cross-contamination and distributed between participating centers...
2017: PloS One
https://www.readbyqxmd.com/read/29035666/examination-of-risk-for-sleep-disordered-breathing-among-college-football-players
#3
Bailey Peck, Timothy Renzi, Hannah Peach, Jane Gaultney, Joseph S Marino
CONTEXT: Professional football linemen are at risk for sleep disordered breathing (SDB) compared to other types of athletes. It is currently unknown whether collegiate football linemen display a similar risk profile. OBJECTIVE: 1) Determine for the first time whether collegiate football linemen show risk for SDB, and 2) Test the hypothesis that SDB risk is higher in collegiate football linemen compared to an athletic comparison group. DESIGN: Descriptive laboratory study...
October 16, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29035377/nme4-nucleoside-diphosphate-kinase-d-in-cardiolipin-signaling-and-mitophagy
#4
Uwe Schlattner, Malgorzata Tokarska-Schlattner, Richard M Epand, Mathieu Boissan, Marie-Lise Lacombe, Valerian E Kagan
Mitophagy is an emerging paradigm for mitochondrial quality control and cell homeostasis. Dysregulation of mitophagy can lead to human pathologies such as neurodegenerative disorders and contributes to the aging process. Complex protein signaling cascades have been described that regulate mitophagy. We have identified a novel lipid signaling pathway that involves the phospholipid cardiolipin (CL). CL is synthesized and normally confined at the inner mitochondrial membrane. However, upon a mitophagic trigger, ie, collapse of the inner membrane potential, CL is rapidly externalized to the mitochondrial surface with the assistance of the hexameric nucleoside diphosphate kinase D (NME4, NDPK-D, or NM23-H4)...
October 16, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29034563/heart-failure-study-of-multipoint-pacing-effects-on-ventriculoarterial-coupling-rationale-and-design-of-the-humvee-trial
#5
Christina Chrysohoou, Polychronis Dilaveris, Christos-Konstantinos Antoniou, Ioannis Skiadas, Konstantinos Konstantinou, Konstantinos Gatzoulis, Ioannis Kallikazaros, Dimitrios Tousoulis
Cardiac resynchronization therapy (CRT) is an established therapy for symptomatic heart failure (HF). Unfortunately, many recipients remain nonresponders. Studies have revealed the potential role of multipoint pacing (MPP) in improving response and outcomes. The aim of this study is to compare the effects of MPP against those of standard biventricular pacing (BVP) on (i) ventriculoarterial coupling (VAC) and energy efficiency of the failing heart, (ii) diastolic function, (iii) quality of life, and (iv) NT-proBNP levels and glomerular filtration rate (GFR) during a follow-up of 13 months...
October 15, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29033928/unexpectedly-high-prevalence-of-common-variable-immunodeficiency-in-finland
#6
Jannica S Selenius, Timi Martelius, Sampsa Pikkarainen, Sanna Siitonen, Eero Mattila, Risto Pietikäinen, Pekka Suomalainen, Arja H Aalto, Janna Saarela, Elisabet Einarsdottir, Asko Järvinen, Martti Färkkilä, Juha Kere, Mikko Seppänen
BACKGROUND: Common variable immunodeficiency (CVID) is the most common primary immunodeficiency. Prevalence varies greatly between countries and studies. Most diagnostic criteria include hypogammaglobulinemia and impaired vaccine response. AIM: To evaluate the minimum prevalence as well as the clinical and immunological phenotypes of CVID in Southern Finland. METHODS: We performed a cross-sectional study to assess all adult CVID patients followed up in three hospital districts in Southern and South-Eastern Finland between April 2007 and August 2015...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29032544/analysis-of-dna-and-rna-binding-properties-of-borrelia-burgdorferi-regulatory-proteins
#7
J Seshu, Trever C Smith, Ying-Han Lin, S L Rajasekhar Karna, Christine L Miller, Tricia Van Laar
Bioinformatic approaches and a large volume of prokaryotic genome sequences have enabled rapid identification of regulatory proteins with features to bind DNA or RNA in a given prokaryote. However, biological relevance of these regulatory proteins requires methods to rapidly purify and determine their binding properties within the physiological context or life style of the organism. Here, we describe the experimental approaches to determine the nucleic acid binding properties of regulatory proteins of Borrelia burgdorferi using Borrelia host-adaptation Re...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29031760/impact-of-diagnosing-and-treating-obstructive-sleep-apnea-on-healthcare-utilization
#8
Robert J Walter, Scott I Hagedorn, Christopher J Lettieri
PURPOSE: Obstructive sleep apnea (OSA) contributes to an increased risk for multiple co-morbidities and decreased quality of life. As a result, OSA patients may have higher usage of healthcare resources which can be mitigated with effective treatment. This study evaluates changes in healthcare utilization (HCU) following the initiation of therapy for OSA. METHODS: We conducted a retrospective study of newly diagnosed OSA patients. To assess total HCU, we incorporated the sum total of outpatient clinic encounters, laboratory tests, and medication prescriptions into a composite HCU score...
October 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29031605/a-waterborne-outbreak-of-multiple-diarrhoeagenic-escherichia-coli-infections-associated-with-drinking-water-at-a-school-camp
#9
Jungsun Park, Jin Seok Kim, Soojin Kim, Eunkyung Shin, Kyung-Hwan Oh, Yonghoon Kim, Cheon Hyeon Kim, Min Ah Hwang, Chan Mun Jin, Kyoungin Na, Jin Lee, Enhi Cho, Byung-Hak Kang, Hyo-Sun Kwak, Won Keun Seong, Junyoung Kim
BACKGROUND: In June 2015, a local public health laboratory was notified that students had developed gastroenteritis symptoms after participating in a camp. An outbreak investigation was conducted to determine the extent and cause of the outbreak. METHOD: We conducted a retrospective cohort study to determine the correlations between the illness and specific exposures at the school camp. All attendees were interviewed with a standard questionnaire that addressed clinical symptoms, food consumption and environmental exposures...
October 11, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29031331/comparing-subjective-and-objective-evaluation-of-show-jumping-competition-and-warm-up-arena-surfaces
#10
E Hernlund, A Egenvall, S J Hobbs, M L Peterson, A J Northrop, A Bergh, J H Martin, L Roepstorff
The development of safety and quality standards for equestrian surfaces needs to be based on objective, repeatable measurements which allow comparisons between surfaces. These measurements should incorporate the assessment of surface performance by riders. This study provides data from objective and subjective assessment of functional properties of high-level show jumping competition and warm-up arenas. Twenty-five arenas in nine international show jumping events were evaluated by mechanical in-situ testing with a surface tester, rider assessments using visual analogue scales (198 riders provided 749 arena evaluations), descriptions of arena constructions and by laboratory tests of surface material...
September 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29031157/a-european-multi-centre-external-quality-assessment-eqa-study-on-phenotypic-and-genotypic-methods-used-for-herpes-simplex-virus-hsv-drug-resistance-testing
#11
Baharak Afshar, David F Bibby, Renata Piorkowska, Natasha Ohemeng-Kumi, Robert Snoeck, Graciela Andrei, Sarah Gillemot, Florence Morfin, Emilie Frobert, Sonia Burrel, David Boutolleau, Brendan Crowley, Jean L Mbisa
BACKGROUND: Herpes Simplex Virus (HSV) drug resistance is a significant public health concern among immunocompromised individuals. Phenotypic assays are considered the gold standard method for detecting HSV drug resistance. However, plaque reduction assays (PRAs) are technically demanding, often with long turnaround times of up to four weeks. In contrast, genotypic tests can be performed within a few days. OBJECTIVES: The development and coordination of the first European External Quality Assessment (EQA) study to evaluate phenotypic and genotypic methods used for HSV drug resistance testing in specialised reference laboratories...
October 6, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29031156/hiv-misdiagnosis-a-root-cause-analysis-leading-to-improvements-in-hiv-diagnosis-and-patient-care
#12
Raynell Lang, Carmen Charlton, Brenda Beckthold, Kiana Kadivar, Stephanie Lavoie, Doug Caswell, Paul Levett, Greg Horsman, John Kim, M John Gill
BACKGROUND: Standard diagnostic testing for HIV infection has traditionally relied on a high sensitivity HIV antibody screening test using an enzyme-linked immunosorbent assay (ELISA) followed by a high specificity antibody confirmatory test such as a Western Blot. Recently several of the screening assays have been enhanced with an ability to identify p24 antigen thereby narrowing the diagnostic window. OBJECTIVES: To explore the implications of enhanced HIV screening methods that may be leading to HIV misdiagnoses...
October 9, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29031117/reactions-of-melolontha-hippocastani-adults-to-high-manganese-content-in-food
#13
Petr Martinek, Emanuel Kula, Josef Hedbávný
Rapid adaptation of insect species to environmental changes can be advantageous for their development. Forest cockchafer (Melolontha hippocastani) is herbivorous insect species with high food intake that has been widely studied within European conditions. It can cause huge economic and ecological losses especially in oak-dominated forest stands. Food preference of this species is mainly comprised of trees with a potential to accumulate manganese in their assimilation apparatus. In order to determine cockchafer's reactions to increased Mn concentration in its food, the adults were reared in laboratory conditions controlled for temperature, humidity, and light on a natural diet of oak (Quercus petraea) leaves...
October 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29031081/optimization-of-the-promega-powerseq%C3%A2-auto-y-system-for-efficient-integration-within-a-forensic-dna-laboratory
#14
E A Montano, J M Bush, A M Garver, M M Larijani, S M Wiechman, C H Baker, M R Wilson, R A Guerrieri, E A Benzinger, D N Gehres, M L Dickens
The application of massively parallel sequencing (MPS) is growing in the forensic DNA field, as forensic DNA laboratories are continuously seeking methods to gain information from a limited or degraded forensic sample. However, the laborious nature of current MPS methodologies required for successful library preparation and sequencing leave opportunities for improvement to make MPS a practical option for processing forensic casework. In this study, the Promega PowerSeq™ Auto/Y System Prototype, a MPS laboratory workflow that incorporates multiplex amplification, was selected for optimization with the objectives to introduce automation for relieving manual processing, and to reduce the number of steps recommended by the standard protocol...
October 5, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29031018/strategies-to-define-performance-specifications-in-laboratory-medicine-3-years-on-from-the-milan-strategic-conference
#15
Mauro Panteghini, Ferruccio Ceriotti, Graham Jones, Wytze Oosterhuis, Mario Plebani, Sverre Sandberg
Measurements in clinical laboratories produce results needed in the diagnosis and monitoring of patients. These results are always characterized by some uncertainty. What quality is needed and what measurement errors can be tolerated without jeopardizing patient safety should therefore be defined and specified for each analyte having clinical use. When these specifications are defined, the total examination process will be "fit for purpose" and the laboratory professionals should then set up rules to control the measuring systems to ensure they perform within specifications...
October 14, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29030529/microbiological-test-data-assuring-data-integrity
#16
Edward Charles Tidswell, Tim Sandle
Marketed drugs and devices possess specifications including critical microbiological quality attributes purposed to assure efficacy and patient safety. These attributes are legislated requirements intended to protect the recipient patient. Sampling, microbiological testing, interpretation of data for final products, raw materials and intermediates all contribute to a cohesive assessment in the assurance of finished product quality. Traditional culture-based microbiological methods possess inherent and unavoidable variability, recognized by the compendia and which might lead to erroneous conclusion pertaining to product quality...
October 12, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/29029860/chemical-burns-diphoterine-untangled
#17
REVIEW
K Skaria Alexander, Jason Wasiak, Heather Cleland
OBJECTIVE: Diphoterine is a hypertonic, amphoteric, polyvalent and chelating decontamination solution used in the treatment of cutaneous and ocular chemical burns. Due to infrequent use by emergency physicians along with the small number of available studies, its debate in the literature as to its efficacy and safety remains inconclusive. METHODS: A structured literature search was performed in MEDLINE, EMBASE BIOLOGICAL ABSTRACTS and TOXNET to June 2016 for original English-language studies reporting on the safety and effectiveness of Diphoterine...
October 10, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/29029804/a-weight-of-evidence-approach-for-the-bioaccumulation-assessment-of-triclosan-in-aquatic-species
#18
REVIEW
Jon A Arnot, Sascha Pawlowski, Samantha Champ
The bioaccumulation assessment of chemicals is challenging because of various metrics and criteria, multiple lines of evidence and underlying uncertainty in the data. Measured in vivo laboratory and field bioaccumulation data are generally considered preferable; however, quantitative structure-activity relationships (QSARs), mass balance models and in vitro data can also be considered. This case study critically evaluates in vivo, in vitro and in silico data and provides new data for the bioaccumulation assessment of triclosan (TCS)...
October 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29029764/application-of-isocs-system-in-the-laboratory-efficiency-calibration
#19
Dominik Grządziel, Krzysztof Kozak, Jadwiga Mazur, Mariusz Mroczek
ISOCS (In Situ Counting Object System) from Canberra is applied in laboratory for creating efficiency calibrations of good quality without using radioactive standards. Besides of typical sample containers used in laboratory, ISOSC system also allows modelling containers and objects of almost any shape and elemental composition. The study was based on gamma spectrometry with HPGe semiconductor detector with electronics and software spectrum analysis GENIE 2000 + ISOCS. Measuring set is equipped with portable shield system with set of collimators ISOCS Shield Systems Model ISOXSHLD from Canberra...
October 10, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29028438/laser-sintering-technology-and-balling-phenomenon
#20
Perihan Oyar
OBJECTIVE: The aim of this review was to evaluate the balling phenomenon which occurs typically in Selective Laser Sintering (SLS). BACKGROUND DATA: The balling phenomenon is a typical SLS defect, and observed in laser sintered powder, significantly reduces the quality of SLS, and hinders the further development of SLS Technology. METHODS: Electronic database searches were performed using Google Scholar. The keywords "laser sintering, selective laser sintering, direct metal laser melting, and balling phenomenon" were searched in title/abstract of publications, limited to December 31, 2016...
October 13, 2017: Photomedicine and Laser Surgery
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