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Cheapest Covid-19 test at your fingertips soon: Read on for details

Associated Press
Updated: August 17th, 2021, 07:05 IST
in Coronavirus, International, Sci-Tech
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Washington: Researchers have developed a new cheaper, faster and more accurate Covid-19 diagnostic test. This Covid-19 diagnostic test uses electrodes made from graphite. It is the same material found in pencil lead that will be used to detect the SARS-CoV-2 virus. The team at University of Pennsylvania in the US noted that current Covid-19 tests are limited by the tradeoff between accuracy and the time it takes to analyse a sample.

Another challenge of current Covid-19 tests is cost. Most tests are expensive to produce and require trained personnel to administer and analyse them, the researchers said.

The research has been published in the journal PNAS. According to the research, the graphite electrodes in the new test reduce the cost to USD 1.50 per test. Also it requires only 6.5 minutes to deliver the results. The Low-cost Electrochemical Advanced Diagnostic (LEAD) test gives 100-per cent-accurate results from saliva samples. It also gives up to 88 per cent accuracy in nasal samples, the researchers said.

The test uses easily assembled materials such as human angiotensin-converting enzyme 2, modified graphite leads, and a plastic vial.

In the test, the electrodes bind to the samples and a chemical signal is displayed. The height of the peak of the signal indicates whether the sample is negative or positive.

Previously the research team worked on a Covid-19 testing kit called RAPID which uses screen-printed electrodes. The new research uses the same concept as RAPID but with less expensive materials.

“LEAD is easier to assemble, it can be used by anyone and the materials are cheaper and more accessible than those of RAPID,” said Cesar de la Fuente, an assistant professor at University of Pennsylvania.

“This is important because we are using an abundant material, graphite, the same graphite used in pencils, to build the electrode to make testing more accessible to lower-income communities,” de la Fuente said.

The researchers noted that LEAD’s functionalisation and sample diagnosis take less than a few hours and can be made for a fraction of some of the most inexpensive tests on the market. “Currently, we are working to improve the technology and stability of our tests,” said de la Fuente.

“We will always be looking for ways to make the most effective version of LEAD, but we are also working to find industry partners and conduct more clinical studies to push the use of LEAD for COVID testing as soon as possible,” he said.

 

Tags: CheaperCOVID-19ElectrodesleadNasalPennsylvaniaResearchers
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