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Madeleine Johnson

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Madeleine covers PCR, nucleic acid amplification, and sample prep technologies for GenomeWeb. 

Articles Authored by Madeleine Johnson

Sep 16, 2020

FDA Publishes First Batch of SARS-CoV-2 MDx Limit of Detection Comparison Results

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Reported as "nucleic acid amplification test-detectable" units per milliliter, the limits of detection of more than 50 commercial tests differed by 10,000-fold.

Sep 11, 2020

Ultra-Cheap, Sensitive DNA Nanoswitch Tech Developed for SARS-CoV-2 Detection

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The method uses standard lab equipment and the nanoswitches can be easily reconfigured and made in large batches at a cost of about $0.01 per reaction.

Sep 10, 2020

FDA Joins PGx Collaborative Community but Effect on Field is Unclear

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The community is poised to be the primary channel for stakeholders to communicate PGx concerns with FDA, but it is unclear if all stakeholders will participate.

Sep 01, 2020

SARS-CoV-2 Testing Boosts EliTech Assay, Instrument Sales

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The firm was one of the first to have a COVID-19 test receive EUA from the FDA. It is also developing a COVID-19/flu combo test for which it will seek EUA.

Aug 31, 2020

COVID-19 Accelerates Scope Fluidics' Multiplex Point-of-Care MDx Development

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The Warsaw, Poland-based startup expects to submit a rapid SARS-CoV-2 molecular test for EUA and is seeking US manufacturing and distribution partners.

Aug 27, 2020

Resilience Health Curating COVID-19 Molecular Tests for Employers, Public Benefit

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The New York startup is curating available data for all Emergency Use Authorized molecular diagnostic tests for the benefit of the public.

Aug 18, 2020

With New NIH Funding, PathogenDx Pivots From Cannabis Screening to Clinical Diagnostics

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Funding from RADx and NIAID will enable the scale-up of multiplexed viral detection microarrays to 4 million tests per month.

Aug 17, 2020

Biodesix Turns to Digital PCR to Maintain Round-The-Clock COVID Testing

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The firm is using ddPCR to support testing 3,000 samples per day with a turnaround time of approximately 24 hours

Aug 13, 2020

Many Initiatives Turning to RT-LAMP as Alternative to PCR for Rapid COVID-19 Screening Assays

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screening assay NEB colorimetric reagents

Grassroots efforts are leading the way in a number of commercial and non-commercial screening tests in development.

Jul 31, 2020

Facing 'Unfathomable' Demand, Quidel Ramps Up SARS-CoV-2 Test Production

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CEO Doug Bryant noted, in particular, what he expects will be a hunger for rapid protein-based antigen tests for the coronavirus that the market currently can't fill.

The Scan

Open at Publishing

Howard Hughes Medical Institute will be requiring its researchers to publish their work so it is immediately accessible to the public, ScienceInsider writes.

Truth and Science

The Huffington Post reports that Francis Collins, the director of the US National Institutes of Health, has urged Americans to recommit to reason.

Quick Tests to Be Given Out

About 150 million rapid coronavirus tests purchased by the US federal government are to be distributed to nursing homes, colleges, and the states, according to the New York Times.

Nature Papers Examine Molecular Pathways in Alzheimer's Disease, Diploid Potato Assembly, More

In Nature this week: multi-omic analysis of Alzheimer's disease brain samples, de novo assembly of a diploid potato, and more.

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