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Real Time RT-PCR

Real Time RT-PCR

Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...

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Swabbing the Urban Environment - A Pipeline for Sampling and Detection of SARS-CoV-2 From Environmental Reservoirs

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Published on: April 9, 2021

RT-PCR negative COVID-19.

Heta Parmar¹, Margaret Montovano², Padmapriya Banada¹

¹The Public Health Research Institute and the Department of Medicine, Rutgers New Jersey Medical School, Newark, NJ, USA.

BMC Infectious Diseases

|February 14, 2022

Summary

This summary is machine-generated.

Many patients with COVID-19 symptoms test negative for RT-PCR but show positive serology. This suggests a high likelihood of infection, yet these individuals often miss out on crucial COVID-19 treatments.

Keywords:

COVID-19 Diagnosis RT-PCR SARS-CoV-2 Suspects

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A Blood-based Test for the Detection of ROS1 and RET Fusion Transcripts from Circulating Ribonucleic Acid Using Digital Polymerase Chain Reaction

A Blood-based Test for the Detection of ROS1 and RET Fusion Transcripts from Circulating Ribonucleic Acid Using Digital Polymerase Chain Reaction

Published on: April 5, 2018

Area of Science:

Infectious Diseases
Immunology
Public Health

Background:

COVID-19 is a multi-system viral infection with available antiviral and anti-inflammatory treatments.
A significant number of patients with COVID-19 symptoms present with repeatedly negative RT-PCR tests, causing treatment hesitancy.
Early pandemic serology studies are crucial for understanding infection likelihood when background prevalence is low.

Purpose of the Study:

To estimate the likelihood of COVID-19 infection in RT-PCR negative patients exhibiting compatible clinical signs and symptoms.
To compare serological markers between RT-PCR negative patients with symptoms and confirmed COVID-19 cases.
To assess the impact of RT-PCR negativity on treatment decisions for patients with COVID-19 symptoms.

Main Methods:

Comparative serologic testing was performed between April and October 2020.
Patient groups included: RT-PCR negative 'Probables' (N=20), 'Suspects' with alternative diagnoses (N=15), 'Non-suspects' (N=43), RT-PCR confirmed COVID-19 (N=40), and pre-pandemic controls (N=55).
Seropositivity for IgG and IgM antibodies was analyzed and compared across groups.

Main Results:

'Probables' demonstrated similar seropositivity rates for IgG (60.0%) and IgM (50.0%) as RT-PCR confirmed COVID-19 patients (80.0% IgG, 72.5% IgM).
Seropositivity in 'Probables' was significantly higher than in 'Suspects' and 'Non-suspects' (p<0.01).
Despite similar disease severity, 'Probables' were half as likely to receive COVID-19 treatment compared to RT-PCR confirmed cases.

Conclusions:

A high likelihood of acute COVID-19 infection exists among patients with typical symptoms but negative RT-PCR results.
There is a common omission of necessary COVID-19 therapies for these clinically diagnosed patients.
Clinical diagnosis of COVID-19, irrespective of RT-PCR results, should guide treatment decisions.