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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

May 21, 2020

Head-to-Head Comparisons of Commercial SARS-CoV-2 MDx Tests Point to Few Differences in Accuracy

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More than a dozen studies have been published to date directly comparing molecular diagnostic COVID-19 tests, with some detecting differences, mostly in sensitivity.

May 19, 2020

BioMérieux's BioFire Pneumonia Panel Could Improve Care, Find Secondary Infection in COVID-19 Cases

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A handful of recently published trials suggest that use of the pneumonia panel could lead to more targeted therapy delivered more quickly than standard methods.

May 15, 2020

Becton Dickinson to Expand Into Point-of-Care MDx With NAT Diagnostics Acquisition

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The acquisition will round out BD's molecular portfolio and be complementary to the firm's Veritor immunoassay system, according to executives. 

May 14, 2020

FDA Requiring Real Patient Samples for Emergency Use Authorization of COVID-19 MDx Tests

With the US now awash in positive samples, assay developers seeking authorization will no longer be allowed to use contrived samples.

May 12, 2020

Accelerate Diagnostics Adapts to COVID-19 With Antibody Tests, Instrument

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The firm has characterized the new product as a way to seize an opportunity, rather than a shift from its ID-AST focus.

May 04, 2020

As Concerns Deepen, FDA Tells Companies to Prove Coronavirus Antibody Tests Work

The agency will now require commercial antibody test manufacturers to meet certain sensitivity and specificity thresholds.

Apr 27, 2020

Clinical Labs Face Myriad of Obstacles as They Validate COVID-19 Serology Tests

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With few FDA Emergency Use Authorized serology tests and little independent validation, US labs must choose among 100 assays of unknown quality.

Apr 23, 2020

Curative, KorvaLabs Partner to Create High-Throughput COVID-19 Oral Fluid Testing Lab

The partners received Emergency Use Authorization last week for a test that uses oral fluids, and the lab has capacity to test up to 10,000 samples per day.

Apr 22, 2020

FDA to Harmonize COVID-19 Data with New Terminology Codes

The agency plans to work with a number of partners to develop codes that will describe tests and results to standardize data collection.

Apr 22, 2020

Dutch Firm Molecular Biology Systems Validating Rapid Thermal Cycler for COVID-19 Testing

MBS has developed a compact endpoint PCR system which can test more than 22,000 patient samples per day by performing eight-minute thermal cycling.

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