Polymerase Chain Reaction News and Research

RSS

Polymerase chain reaction (PCR) is a revolutionary laboratory technique that enables the replication of a specific DNA sequence. Using PCR, millions of copies of a target DNA can be easily synthesized within a short period of time.

N501Y mutation may be associated with higher viral load, says preliminary study

A new preprint research paper posted to the medRxiv server deals with the preliminary results of a study on the so-called British variant, UI-202012/01, also known as lineage B.1.1.7 or 20B/501Y.V1.

19 Jan 2021

Prolonged shedding and multiple mutations 154 days after initial SARS-CoV-2 diagnosis reported

An interesting new preprint published on the medRxiv server describes an immunosuppressed patient with coronavirus disease 2019 (COVID-19) who continued to shed the virus for an astounding 154 days. During this period, the virus underwent numerous mutations.

19 Jan 2021

About 60 percent of SARS-CoV-2 cases in England tied to new variant by the end of December

One new SARS-CoV-2 variant of concern, called 202012/01, started to spread in England in late October. A new study published on the pre-print server medRxiv found that 60 percent of daily COVID-19 cases screened by the Alderley Park Lighthouse Labs were tied to 202012/01, also known as lineage B.1.1.7 or 20B/501Y.V1. This suggests a rapid spread of the new variant across the country.

18 Jan 2021

SARS-CoV-2 RNA in blood serum could predict COVID-19 mortality

Researchers find that the presence of SARS-CoV-2's genetic material in the serum of positive patients could be a sturdy biomarker for predicting COVID-19-related mortality.

18 Jan 2021

SARS-CoV-2 anti-N rigid monoclonal antibodies provide accurate early diagnosis

An interesting new preprint research paper that was posted on the bioRxiv* server recently describes the use of rigid monoclonal antibodies (mAbs) in contrast to flexible mAbs, and how this affects the binding of multiple mAbs to the same antigen.

17 Jan 2021

Research suggests St. John's Wort and Echinacea could protect against COVID-19

Researchers in Saudi Arabia have conducted a study demonstrating the antiviral effects of two medicinal herbs against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) – the agent that causes coronavirus disease 2019 (COVID-19).

17 Jan 2021

Can cloth masks protect healthcare professionals from SARS-CoV-2?

Given the global scarcity of surgical masks, a recent review study examines this issue - dealing with the potential use of cloth masks in healthcare scenarios.

15 Jan 2021

New DNA test quickly identifies secondary infections in COVID-19 patients

Researchers have developed a DNA test to quickly identify secondary infections in COVID-19 patients, who have double the risk of developing pneumonia while on ventilation than non-COVID-19 patients.

15 Jan 2021

Certain oral pathogens are more prevalent in esophageal cancer patients

Researchers led by Tokyo Medical and Dental University (TMDU) find that certain oral pathogens are more prevalent in esophageal cancer patients, and could be used as a novel diagnostic tool.

14 Jan 2021

No inflammation of cerebrospinal fluid in COVID-19 patients with neurological features, study finds

Many patients with COVID-19 have shown neurological complications, leading to scientific interest in the role played by its causative pathogen, SARS-CoV-2, in brain inflammation. A new study has described the absence of neuroinflammation in cerebrospinal fluid (CSF).

14 Jan 2021

Hypoxia signaling pathway could lead to COVID-19 treatments

Researchers in Spain have demonstrated that studying the hypoxia signaling pathway could provide opportunities for treating coronavirus disease 2019 (COVID-19).

12 Jan 2021

The mystery of Giglio island’s resistance to COVID-19

An intriguing new study explores the mechanisms by which an Italian island called Giglio remained resistant to coronavirus disease 2019 (COVID-19) even after much exposure.

11 Jan 2021

Could Ivermectin be an effective antiviral against SARS-CoV-2?

A double-blind, randomized, placebo-controlled clinical trial has recently demonstrated that Ivermectin, an anti-parasitic drug, can reduce in-hospital mortality rate of COVID-19 patients.

11 Jan 2021

Study shows P681H mutation is becoming globally prevalent among SARS-CoV-2 sequences

In a recent bioRxiv preprint study, researchers from the University of Hawaii showed that the S gene of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is continuously mutating according to the sequence and phylogenetic analysis.

10 Jan 2021

New test detects SARS-CoV-2 in less than 5 mins

A fast and accurate virus detection strategy is very crucial to reduce the rate of transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the pathogen responsible for COVID-19. The global scientific research community responded to this unprecedented demand in diagnostic testing by developing several detection platforms, the most sensitive of which detect the viral RNA.

10 Jan 2021

Researchers develop a low-cost, saliva-optimized RT-LAMP assay for faster detection of SARS-CoV-2

SARS-CoV-2 pandemic has highlighted the shortcomings in emergency response globally and has driven a massive demand for in vitro diagnostic testing technologies. In order to address these issues, researchers from the US recently used the new pH dye LAMPShade Violet (LSV) in RT-LAMP. LSV has better visual contrast between high and low pH and a stronger inflection point, both of which enable easy interpretation of results and reduces ambiguity.

8 Jan 2021

A paper-based sensor for detecting COVID-19

News-Medical talks to Dipanjan Pan about the development of a paper-based electrochemical sensor that can detect COVID-19 in less than five minutes.

5 Jan 2021

Middle-aged adults with comorbidities high-risk category for COVID-19-related mortality in Mexican study

Researchers from Mexico demonstrate how they calculated age-stratified COVID-19 case fatality rates, years of life lost (YLL), and relative risk for 9 comorbidities and 23 comorbidity combinations in a retrospective study.

5 Jan 2021

Anti-SARS-CoV-2 NTD-directed antibodies are protective against lethal infection

As the world struggles to contain the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), responsible for over 1.6 million deaths and 76 million infections globally, researchers are trying to pin down the determinants of lethality, of infectivity and of protection. Such data would help contain its spread and develop preventive and therapeutic antivirals and vaccines. A new preprint that appeared recently on the bioRxiv* server describes the high degree of protection afforded by antibodies that target the N-terminal domain (NTD) of the virus.

24 Dec 2020

COVID-19 contact tracing ineffective without timely testing and isolation, study says

A new study by Canada-based researchers has showed that contact tracing is not effective if testing and isolation are delayed.

21 Dec 2020