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16:44 EST 22nd January 2019 | BioPortfolio

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Showing "Laboratories" PubMed Articles 76–100 of 462

Artificial blood feeding for Culicidae colony maintenance in laboratories: does the blood source condition matter?

Culicidae colonization in laboratory is paramount to conduct studies aiming at a better understanding of mosquitoes' capacity to transmit pathogens that cause deadly diseases. Colonization requires female blood feeding, a necessary step for maturation of female's oocytes. Direct blood feeding on anesthetized mammals implies in a number of disadvantages when compared to artificial blood feeding. Consequently, laboratories worldwide have been trying to -feed female mosquitoes artificially in order to replace ...

Laboratory-acquired scrub typhus and murine typhus infections: The argument for risk-based approach to biosafety requirements for Orientia tsutsugamushi and Rickettsia typhi laboratory activities.

This study examined the literature on laboratory-acquired infections (LAIs) associated with scrub typhus (Orientia tsutsugamushi) and murine typhus (Rickettsia typhi) research to provide an evidence base for biosafety and biocontainment. Scrub typhus LAIs were documented in 25 individuals, from 1931-2000 with 8 (32%) deaths during the pre-antibiotic era. There were 35 murine typhus LAI reports and no deaths. Results indicated that highest risk activities were working with infectious laboratory animals invol...

How to Generate a More Accurate Laboratory-Based International Normalized Ratio: Solutions to Obtaining or Verifying the Mean Normal Prothrombin Time and International Sensitivity Index.

Although the landscape of anticoagulation therapy is evolving, vitamin K antagonists (VKAs) such as warfarin remain an anticoagulant of choice for many clinicians and their patients. Nevertheless, management of VKA therapy remains challenging, largely because of patient variability and drug and food interactions; thus, VKA dosing has to be personalized. This is achieved by regular monitoring using a test called the , mathematically converted to an international normalized ratio (INR). The INR system is mean...

Optical Versus Virtual Microscope for Medical Education: A Systematic Review.

Many technological innovations have changed the traditional practice of medical education and clinical practice. Whole slide imaging (WSI) technology provided an unique way of viewing conventional glass slides in histology and pathology laboratories. The WSI technology digitalized glass slide images and made them readily accessible via the Internet using tablets or computers. Users utilized the pan-and-zoom function to view digital images of slides, also referred to as the virtual microscope (VM), simulatin...

Screening for Syphilis with Dual Algorithms: Analysis of Discordant and Concordant Serology Results in a Population with a Low Prevalence of Syphilis.

Currently, many laboratories have switched the traditional screening algorithm (TSA) to reverse screening algorithm (RSA) for the efficiencies in high-volume syphilis screening. However, confusions have been arisen regarding this paradigm shift.

In vitro developmental competence of horse embryos derived from oocytes with a different corona radiata cumulus-oocyte morphology.

The increase in demand for in vitro produced horse embryos is fostering the development of commercial laboratories for this purpose. Nevertheless, blastocyst production after intracytoplasmic sperm injection (ICSI) is still not as great as desired in most of these laboratories. In relation to horse oocyte classification, both expanded and compact cumulus-oocyte-complexes (COCs) are used for in vitro embryo production. The aim of this study was to compare in vitro embryo developmental capacity of COCs from h...

Performance evaluation of HbA1c measurement systems with sigma metric for 1066 laboratories in China.

This study aimed to evaluate the performance of HbA1c measurement systems quantitatively with sigma metric and promote the quality improvement.

Inter-laboratory Test for oxygen and hydrogen stable isotope analyses of Geothermal Fluids: Assessment of Reservoir Fluid Compositions.

Knowledge of the accuracy and precision for oxygen (δ O values) and hydrogen (δ H values) stable isotope analyses of geothermal fluid samples is important to understand geothermal reservoir processes, such as partial boiling-condensation and encroachment of cold and reinjected waters. The challenging aspects of the analytical techniques for this specific matrix include memory effects and higher scatter of delta values with increasing total dissolved solids (TDS) concentrations, deterioration of Pt-catalys...

Reproducibility of quantitative flow ratio: An inter-core laboratory variability study.

Quantitative flow ratio (QFR) is a novel approach to derive fractional flow reserve (FFR) from coronary angiography. This study sought to evaluate the reproducibility of QFR when analyzed in independent core laboratories.

In Vitro Activity of Cefiderocol, a Siderophore Cephalosporin, Against Gram-Negative Bacilli Isolated by Clinical Laboratories in North America and Europe in 2015-2016: SIDERO-WT-2015.

Cefiderocol (S-649266) is a parenteral siderophore cephalosporin currently in Phase III of clinical development. In this study, we determined the in vitro susceptibility of a 2015-2016 collection of 8,954 clinical isolates of Gram-negative bacilli (GNB), provided by 100 clinical laboratories in North America and Europe, to cefiderocol and comparators using the Clinical and Laboratory Standards Institute broth microdilution method. Iron-depleted cation-adjusted Mueller-Hinton broth was used to test cefideroc...

Anabolic-androgenic steroids: procurement and administration practices of doping athletes.

Performance enhancing substances are becoming increasingly popular amongst bodybuilders and people who want to enhance their physiques. However, due to the rise of the Internet and laws prohibiting sales of these substances without prescription, the route of procurement and administration practices have become more and more dangerous. Prior to the mid-1970's, anabolic steroids were not regulated and easily available from physicians and pharmacies in several countries. In 1990, the United States enacted the ...

Vascular complications in patients who underwent endovascular cardiac procedures: multicenter cohort study.

to analyze vascular complications among patients who underwent endovascular cardiac procedures in the hemodynamic laboratories of three referral centers.

Vascular access complications in patients undergoing percutaneous procedures in hemodynamics: a scoping review.

To map the production of knowledge on vascular access complications in patients undergoing percutaneous procedures in hemodynamic laboratories.

Mastering Craniovertebral Junction Surgical Approaches: The Dissection Laboratory Experience at the Catholic University of Rome.

The craniovertebral junction is an intricate anatomical region frequently affected by neoplastic, vascular, traumatic, congenital and degenerative pathology. Because the topography of this region is complex, direct knowledge and full mastery of craniocervical anatomy is mainly obtained through anatomical dissections performed in neuroanatomical laboratories.

Clinical Outcomes Using a Novel Image-Guided Planning System in Patients With Cataract and IOL Implantation.

To determine the proportion of eyes with preexisting astigmatism achieving 0.50 diopters (D) or less of residual refractive cylinder 3 months after either implantation of toric intraocular lenses (IOLs) or corneal incisions using the VERION system (Alcon Laboratories, Inc., Fort Worth, TX) measurement module and digital markers for microscope (M) and laser (L).

Me-too validation study for in vitro eye irritation test with 3D-reconstructed human cornea epithelium, MCTT HCE.

The need for in vitro eye irritation test replacing in vivo is steadily increasing. The MCTT HCE™ eye irritation test (EIT) using 3D reconstructed human cornea-like epithelium, was developed to identify ocular irritants from non-irritants those that are not requiring classification and labelling for eye irritation. Here, we report the results of me-too validation study, which was conducted to evaluate the reliability and relevance of the MCTT HCE EIT, according to performance standards (PS) of OECD TG 492...

A primer on patient-based quality control techniques.

Patient-based Quality Control techniques have been described for more than fifty years and have been widely used routinely in hematology for forty. However, because of practical issues they have not been widely utilised in clinical chemistry laboratories. But recently because of the availability of middleware and a greater appreciation of the benefits of these processes there has been a willingness to investigate their use as a QC tool.

Utility of cell population data (VCS parameters) as a rapid screening tool for Acute Myeloid Leukemia (AML) in resource-constrained laboratories.

Despite advances in diagnostic techniques, many cases of acute myeloid leukemia (AML) remain underdiagnosed in remote centers unequipped with these technologies. We hypothesized that the automated cellular indices with scatter plots and flags may aid in rapid and cost-effective screening of AML.

Of Discomfort and Disagreement:Unclaimed Bodies in Anatomy Laboratories at United States Medical Schools.

Use of unclaimed bodies for anatomy teaching in undergraduate medical education continues, but is ethically controversial. The purposes of this study were to estimate the proportion of United States medical schools using unclaimed bodies in first-year anatomy laboratories, to determine whether schools inform students of this use, and to explore anatomy course leaders' attitudes toward unclaimed body use. Anatomy course leaders from 146 United States medical schools that had independent pre-clinical programs...

Microsurgery Training Resource Variation among US Integrated Plastic Surgery Residency Programs.

 Given emerging focus on competency-based surgical training and work-hour limitations, surgical skills laboratories play an increasingly important role in resident education. This study was designed to investigate educational opportunities in microsurgery across integrated residency programs.

Adult CSF total protein: Higher upper reference limits should be considered worldwide. A web-based survey.

The cerebrospinal fluid total protein level (CSF-TP) is commonly used as a potential marker of infectious or immune disease of the CNS and PNS. Recent laboratory reference studies indicate that the antiquated single upper reference limit of 0.45 g/L commonly used by hospital laboratories and widely quoted in medical literature is a significant underestimation.

Validation of a whole-slide image-based teleconsultation network.

Most validation studies on digital pathology diagnostics have been performed in single institutes. Since rapid consultation of extramural experts is one of the most important use cases for digital pathology laboratory networks, the aim of this study was to validate a whole slide image-based teleconsultation network between three independent laboratories.

The Importance of Specimen Reception and the Universal Challenges It Faces in Laboratory Flow: A Brief Overview.

In this brief overview, I emphasize the importance of the specimen-reception department in the running and flow of a laboratory. Also, I outline the problems and the challenges it faces, which are almost universally applicable to all laboratories. To my knowledge, this topic has not been directly reported before in the literature.


During this retrospective study, 18 plasma blood chemistry and 17 complete blood count (CBC) samples were analyzed from clinically healthy spotted eagle rays ( Aetobatus narinari) at Georgia Aquarium in order to generate hematological ranges for complete blood count (CBC) and biochemical profiles. Summary statistics were generated according to the American Society for Veterinary Clinical Pathology guidelines for the determination of reference intervals in veterinary species. The mean packed cell volume (PC...

Brief Report: "Um" Fillers Distinguish Children With and Without ASD.

Two laboratories have reported that children with ASD are less likely than their typical peers to fill pauses with um but their use of uh is unaffected (Irvine et al., J Autism Dev Disord 46(3):1061-1070, 2016; Gorman et al., Autism Res 9(8):854-865, 2016). In this brief report, we replicated this finding by comparing the discourse of 7-to-15-year-olds with ASD (N = 31) to that of their typically developing same-age peers (N = 32). The robustness of this easily documented difference in discourse sug...

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