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https://www.readbyqxmd.com/read/28444315/towards-the-early-detection-of-%C3%AE-lactamase-producing-enterobacteriaceae-by-maldi-tof-ms-analysis
#1
Marina Oviaño, Marta Gómara, Maria José Barba, María José Revillo, Luis Pedro Barbeyto, Germán Bou
Objectives: Development of a novel MALDI-TOF MS-based method for the rapid detection of ESBL-producing Enterobacteriaceae. Methods: The method was evaluated in terms of sensitivity, specificity and turnaround time regarding the antibiotic used (cefotaxime, ceftazidime, ceftriaxone, cefpodoxime or cefepime) and the performance of the automated MBT STAR-BL software (Bruker Daltonik GmbH, Germany) relative to qualitative interpretation of spectra for detecting β-lactamase resistance by MALDI-TOF MS (Bruker Daltonik) in a collection of 11 isogenic Escherichia coli control strains expressing different β-lactamases...
April 24, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28442515/genetic-polymorphisms-rs699947-rs1570360-and-rs3025039-on-the-vegf-gene-are-correlated-with-extracranial-internal-carotid-artery-stenosis-and-ischemic-stroke
#2
Binod Kumar Yadav, Renu Yadav, Hyuk Chang, Kangho Choi, Joon-Tae Kim, Man Seok Park, Hyun Goo Kang, Insung Choo, Seong Hwan Ahn, Dong Seok Oh, Yeon Soo Ha, Ihngyu Kim, Man-Wook Seo, Byoung-Soo Shin
Extracranial internal carotid artery (ECICA) stenosis is a modifiable risk factor of ischemic stroke. VEGF plays a crucial role in the maintenance of endothelial integrity and physiological function. This study was designed to assess the correlations of VEGF polymorphisms with ECICA stenosis in ischemic stroke and to explore the relationships between these polymorphisms and different biochemical parameters. This study included a total of 650 ischemic stroke patients, 232 with ECICA stenosis while 418 had no ECICA stenosis as assessed by magnetic resonance angiography...
March 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28438085/the-feline-blood-film
#3
John W Harvey
Practical relevance: Many veterinary practices have invested in quality automated hematology instruments for use in-house. However, regardless of the specific choice of analyzer, there are important hematology findings that can only be determined by microscopic examination of stained blood films. For this reason, and also for the purpose of quality control for the analyzer, a quick blood film review should be performed alongside every automated complete blood count. Even those practices that submit their blood samples to outside diagnostic laboratories for evaluation, still require the capability to examine stained blood films in emergency situations...
May 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28427845/development-of-a-micro-neutralization-assay-for-ebolaviruses-using-a-replication-competent-vesicular-stomatitis-hybrid-virus-and-a-quantitative-pcr-readout
#4
Stella S Lee, Kathryn Phy, Keith Peden, Li Sheng-Fowler
Development of vaccines against highly pathogenic viruses that could also be used as agents of bioterrorism is both a public health issue and a national security priority. Methods that can quantify neutralizing antibodies will likely be crucial in demonstrating vaccine effectiveness, as most licensed viral vaccines are effective due to their capacity to elicit neutralizing antibodies. Assays to determine whether antibodies are neutralizing traditionally involve infectious virus, and the assay most commonly used is the plaque-reduction neutralization test (PRNT)...
April 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28426134/metastasis-detection-from-whole-slide-images-using-local-features-and-random-forests
#5
Mira Valkonen, Kimmo Kartasalo, Kaisa Liimatainen, Matti Nykter, Leena Latonen, Pekka Ruusuvuori
Digital pathology has led to a demand for automated detection of regions of interest, such as cancerous tissue, from scanned whole slide images. With accurate methods using image analysis and machine learning, significant speed-up, and savings in costs through increased throughput in histological assessment could be achieved. This article describes a machine learning approach for detection of cancerous tissue from scanned whole slide images. Our method is based on feature engineering and supervised learning with a random forest model...
April 20, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28425752/use-of-standard-laboratory-methods-to-obviate-routine-dithiothreitol-treatment-of-blood-samples-with-daratumumab-interference
#6
Nicholas J Lintel, Debra K Brown, Diane T Schafer, Farai M Tsimba-Chitsva, Scott A Koepsell, Sara M Shunkwiler
Daratumumab is an antibody currently used in the treatment of patients with refractory multiple myeloma. Blood samples from patients being treated with daratumumab may show panreactivity during pre-transfusion testing. To facilitate the provision of blood components for such patients, it is recommended that a baseline phenotype or genotype be established prior to starting treatment with daratumumab. If patient red blood cells (RBCs) require phenotyping after the start of daratumumab treatment, dithiothreitol (DTT) treatment of the patient's RBCs should be performed...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28425748/a-field-analysis-trial-comparing-the-turnaround-times-of-routine-and-stat-red-blood-cell-immunohematology-testing
#7
Katie Sackett, Andrea Kjell, Abigail M Schneider, Claudia S Cohn
The turnaround time (TAT) for pre-transfusion testing is important for prompt clinical decision-making. TAT includes the time between the arrival of the sample and the initiation of testing, plus the processing time (PT) required to generate and report a result. The TAT in larger blood banks is mostly dependent upon the capability of the analyzer used. In smaller blood banks, where manual work is often performed, the TAT is dependent on availability and experience of staff, testing resources, and workload. Our site performed a comparative analysis of the ORTHO VISION® (Ortho Clinical Diagnostics, Raritan, NJ) and the Echo® (Immucor, Norcross, GA) blood bank analyzers, using the TAT and PT of standard blood bank tests as the outcome metrics...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28424254/a-european-multicentre-study-on-the-analytical-performance-of-the-veris-hiv-1-assay
#8
Patrick Braun, Rafael Delgado, Monica Drago, Diana Fanti, Hervé Fleury, Jörg Hofmann, Jacques Izopet, Ulrich Kalus, Alessandra Lombardi, MaAngeles Marcos, Davide Mileto, Karine Sauné, Siobhan O'Shea, Alfredo Pérez-Rivilla, John Ramble, Pascale Trimoulet, Jordi Vila, Duncan Whittaker, Alain Artus, Daniel Rhodes
The analytical performance of the VERIS HIV-1 Assay for use on the new, fully automated Beckman Coulter DxN VERIS Molecular Diagnostics System(¥) was evaluated at 10 European Virology laboratories. Precision, analytical sensitivity, performance with negative samples, linearity, and performance with HIV-1 Groups/Subtypes were evaluated. Precision for the 1 mL assay showed an SD of 0.14 log10 cp/mL or less and CV ≤6.1% for each level tested. The 0.175 mL assay showed an SD of 0.17 log10 cp/mL or less and CV ≤5...
April 19, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28421520/evaluation-of-passive-sampling-of-gaseous-mercury-using-different-sorbing-materials
#9
Huiming Lin, Wei Zhang, Chunyan Deng, Yingdong Tong, Qianggong Zhang, Xuejun Wang
Atmospheric mercury monitoring is essential because of its potential human health and ecological impacts. Current automated monitoring systems include limitations such as high cost, complicated configuration, and electricity requirements. Passive samplers require no electric power and are more appropriate for screening applications and long-term monitoring. Sampling rate is a major factor to evaluate the performance of a passive sampler. In this study, laboratory experiments were carried out using an exposure chamber to search for high efficiency sorbents for gaseous mercury...
April 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28421504/chapter-20-gavi-automated-vitrification-instrument
#10
Tammie K Roy, Susanna Brandi, Teija T Peura
Gavi is intended for use in a laboratory or clinic environment for the preparation and vitrification of oocytes, cleavage stage embryos and blastocysts. Gavi is designed to automate the equilibration steps in the vitrification process to minimize the variability that occurs during cryopreservation. This automated process reduces the potential for errors and ensures a standardized, repeatable procedure for vitrification in a controlled, closed-system environment.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28420678/automated-analysis-of-high-content-microscopy-data-with-deep-learning
#11
Oren Z Kraus, Ben T Grys, Jimmy Ba, Yolanda Chong, Brendan J Frey, Charles Boone, Brenda J Andrews
Existing computational pipelines for quantitative analysis of high-content microscopy data rely on traditional machine learning approaches that fail to accurately classify more than a single dataset without substantial tuning and training, requiring extensive analysis. Here, we demonstrate that the application of deep learning to biological image data can overcome the pitfalls associated with conventional machine learning classifiers. Using a deep convolutional neural network (DeepLoc) to analyze yeast cell images, we show improved performance over traditional approaches in the automated classification of protein subcellular localization...
April 18, 2017: Molecular Systems Biology
https://www.readbyqxmd.com/read/28420531/high-throughput-determination-of-vancomycin-in-human-plasma-by-a-cost-effective-system-of-two-dimensional-liquid-chromatography
#12
Yanghao Sheng, Boting Zhou
Therapeutic drug monitoring (TDM) is one of the most important services of clinical laboratories. Two main techniques are commonly used: the immunoassay and chromatography method. We have developed a cost-effective system of two-dimensional liquid chromatography with ultraviolet detection (2D-LC-UV) for high-throughput determination of vancomycin in human plasma that combines the automation and low start-up costs of the immunoassay with the high selectivity and sensitivity of the liquid chromatography coupled with mass spectrometric detection without incurring their disadvantages, achieving high cost-effectiveness...
February 27, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28418226/serum-monomeric-laminin-%C3%AE-2-as-a-novel-biomarker-for-hepatocellular-carcinoma
#13
Hirofumi Kiyokawa, Hiroshi Yasuda, Ritsuko Oikawa, Chiaki Okuse, Nobuyuki Matsumoto, Hiroki Ikeda, Tsunamasa Watanabe, Hiroyuki Yamamoto, Fumio Itoh, Takehito Otsubo, Toru Yoshimura, Eisaku Yoshida, Masatoshi Nakagawa, Naohiko Koshikawa, Motoharu Seiki
The diagnosis of hepatocellular carcinoma (HCC) in the early stages is important for successful clinical management. Laminin (Ln)-γ2 expression has been reported in various types of malignant carcinomas. We recently developed a highly sensitive method to measure serum monomeric Ln-γ2 levels using a fully automated chemiluminescent immunoassay (CLIA). Using our CLIA, we evaluated its diagnostic value in sera from patients with chronic liver disease (CLD) and patients with hepatocellular carcinoma (HCC). Serum alpha-fetoprotein (AFP) and des-gamma-carboxy prothrombin (DCP) were also examined in these subjects...
April 18, 2017: Cancer Science
https://www.readbyqxmd.com/read/28414985/sharp-and-blunt-force-trauma-concealment-by-thermal-alteration-in-homicides-an-in-vitro-experiment-for-methodology-and-protocol-development-in-forensic-anthropological-analysis-of-burnt-bones
#14
Ioana Macoveciuc, Nicholas Márquez-Grant, Ian Horsfall, Peter Zioupos
Burning of human remains is one method used by perpetrators to conceal fatal trauma and expert opinions regarding the degree of skeletal evidence concealment are often disparate. This experiment aimed to reduce this incongruence in forensic anthropological interpretation of burned human remains and implicitly contribute to the development of research methodologies sufficiently robust to withstand forensic scrutiny in the courtroom. We have tested the influence of thermal alteration on pre-existing sharp and blunt trauma on twenty juvenile sheep radii in the laboratory using an automated impact testing system and an electric furnace...
March 29, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28414786/the-model-for-end-stage-liver-disease-meld-as-a-predictor-of-short-term-mortality-in-staphylococcus-aureus-bloodstream-infection-a-single-centre-observational-study
#15
Jan A Roth, Andreas F Widmer, Sarah Tschudin-Sutter, Marc Dangel, Reno Frei, Manuel Battegay, Balthasar L Hug
BACKGROUND: Automated laboratory-based prediction models may support clinical decisions in Staphylococcus aureus bloodstream infections (BSIs), which carry a particularly high mortality. Small studies indicated that the laboratory-based Model for End-stage Liver Disease (MELD) score is a risk factor for mortality in critically ill patients with infections. For S. aureus BSIs, we therefore aimed to assess a potential association of the MELD score with mortality. METHODS: In this single-centre observational study, all consecutive patients with a first episode of methicillin-susceptible S...
2017: PloS One
https://www.readbyqxmd.com/read/28413870/performance-evaluation-of-a-newly-developed-and-fully-automated-bacteriological-analyzer-raisus-any-for-antimicrobial-susceptibility-testing-of-fastidious-bacteria-haemophilus-influenzae-and-streptococcus-pneumoniae
#16
Toshio Ohshima, Saori Nomiya, Yukari Yamamoto, Miki Miyazawa, Jun Ohsuga, Akifumi Hisada, Kenji Iwawaki, Satomi Asai, Hayato Miyachi
OBJECTIVE: Antimicrobial susceptibility testing for fastidious bacteria, such as Haemophilus influenzae (H. influenzae) and Streptococcus pneumoniae (S. pneumoniae) has been performed manually. We evaluated the performance of a newly developed fully automated system for rapid bacterial identification and antimicrobial susceptibility testing "RAISUS ANY" (Nissui Pharmaceutical Co., Ltd.). METHODS: We evaluated the performance of "RAISUS ANY" for measurement of minimal inhibitory concentrations (MICs) of H...
April 20, 2017: Tokai Journal of Experimental and Clinical Medicine
https://www.readbyqxmd.com/read/28412717/fibrinogen-determination-according-to-clauss-commutability-assessment-of-international-and-commercial-standards-and-quality-control-samples
#17
Antonius M H P van den Besselaar, Claudia J J van Rijn, Christa M Cobbaert, G Louis A Reijnierse, Martine J Hollestelle, René W L M Niessen, Francisca Hudig
BACKGROUND: Many clinical laboratories use a clotting rate assay according to Clauss for the determination of fibrinogen in citrated plasma. The aim of the present study was to assess the commutability of the current International Standard for fibrinogen (coded 09/264), three commercial fibrinogen standards, and 10 freeze-dried plasma quality control samples from various sources. METHODS: Clotting rate assays according to Clauss were performed on three automated instruments (Sysmex CA1500, STA-Rack Evolution and ACL-Top 700), using three commercial thrombin reagents (Siemens, Stago, and Instrumentation Laboratory)...
April 17, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28412378/project-management-importance-for-diagnostic-laboratories
#18
REVIEW
Antony Croxatto, Gilbert Greub
BACKGROUND: The constraints applied on diagnostic laboratories to improve both quality and productivity together with personal shortages incite laboratory managers to constantly optimize the laboratory workflows, organization and technology. These continuous modifications of the laboratories should be conducted using efficient project and change management approaches in order to maximize the opportunities to achieve the project successfully. AIM: This review aims at presenting a general overview of project management with an emphasis on selected critical aspects...
April 12, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28410875/particle-sorting-by-paramecium-cilia-arrays
#19
Richard Mayne, James G H Whiting, Gabrielle Wheway, Chris Melhuish, Andrew Adamatzky
Motile cilia are cell-surface organelles whose purposes, in ciliated protists and certain ciliated vertebrate epithelia, include generating fluid flow, sensing and substance uptake. Certain properties of cilia arrays, such as beating synchronisation and manipulation of external proximate particulate matter, are considered emergent, but remain incompletely characterised despite these phenomena having being the subject of extensive modelling. This study constitutes a laboratory experimental characterisation of one of the emergent properties of motile cilia: manipulation of adjacent particulates...
April 11, 2017: Bio Systems
https://www.readbyqxmd.com/read/28401245/automating-clinical-score-calculation-within-the-electronic-health-record-a-feasibility-assessment
#20
Christopher Aakre, Mikhail Dziadzko, Mark T Keegan, Vitaly Herasevich
OBJECTIVES: Evidence-based clinical scores are used frequently in clinical practice, but data collection and data entry can be time consuming and hinder their use. We investigated the programmability of 168 common clinical calculators for automation within electronic health records. METHODS: We manually reviewed and categorized variables from 168 clinical calculators as being extractable from structured data, unstructured data, or both. Advanced data retrieval methods from unstructured data sources were tabulated for diagnoses, non-laboratory test results, clinical history, and examination findings...
April 12, 2017: Applied Clinical Informatics
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