South African scientists could be at the brink of finding possible vaccine for #Covid19 through genome sequencing

  • By Ziyanda Yono

  • Category: Business

National Institute for Communicable Diseases (NICD) and University of Western Cape’s South African National Bioinformatics Institute (SANBI) scientists reported to be at a possible bring of developing a vaccine for persisting #Corona Virus termed as #Covid19 global pandemic.

These experts have so far managed to sequence a “Genome” which is a scientific term for the technique that allows researchers to read and decipher the genetic information found in the DNA of anything from bacteria to plants to animals.
The scientist’s breakthrough involves the very first acute respiratory syndrome coronavirus 2 (SARS-Cov-2) genome providing identifying the base-pair pattern of #Covid19 to help better understand the pandemic through investigating a respiratory illness from a patient who tested positive for the virus in South Africa.

The virus sample will form part of to the Global Initiative on Sharing All Influenza Data (GISAID) records.
On the current records there exist about 4000 SARS-CoV-2 genetically sequenced virus samples, though the number is still relatively small, all the additional samples will provide a database that has much-needed boost in information.

Behind the magnificent genome sequencing breakthrough are researcher and co-author of the report with Dr Arshad Ismail, Peter van Heusden, however they have expressed their concerns and hope for the genome sequencing to be scaled and sped up in South Africa.

“When we started last month, we had both a laboratory and a computer challenge as the scientists had to first isolate the virus’ genetic material, the RNA, from the patient’s DNA, as the virus was not lab-grown, said Van Heusden.

On the other hand, their colleagues in Congo and Senegal have already sequenced 20 and 25 samples respectively since the virus was first detected in those countries and the developments are expanding reports said.

The scientists say that it is in identifying the different patterns spotted by other scientists and anomalies in how the virus is possibly mutating, adapting and replicating, hence the urgency to have more samples sequenced.

Studying the case of South African #Covid19 patient Van Heusden said, “When we put it together, we found that in this patient, the virus had six differences in its 29,000 RNA letters compared with virus samples recorded in China, where the virus was detected at the end of 2019. Six differences are tiny number and don’t seem to affect how the virus is changing or in the way it produces protein which are the molecular machines that make cells work and the virus genome is like a recipe book of proteins that the virus needs to invade cells and to make copies of itself.”

“Genetic fingerprinting also means we can organize samples into clusters so we can understand how the disease is spreading”, he added.
A previous report from the World Health Organisation (WHO) mentioned how the global community is racing to slow down and eventually halt the spread of COVID-19, a pandemic that has claimed thousands of lives and sickened tens of thousands of others across the globe.
In Africa, the virus has spread to dozens of countries within weeks. Governments and health authorities across the continent are striving to limit widespread infections which moves African scientist from the position of readiness to rapid response concerning the curbing of coronavirus know as #Covid19.

The previous outbreak of listeriosis in South Africa during the first months of 2018 saw the first whole-genome sequencing used to identify the source of the disease outbreak. The co-author of the recent sampling report, Ismail was also at the centre of the listeriosis genome sequencing initiative.

His efforts suggested that the food product – polony – and factories where the contaminated polony was manufactured were immediately identified which helped a great deal to contain the spread of the disease. The scientists also state accurate information gathering from patients who tested positive for #Covid19 is very critical to correlate with the genetic sequence results for a more comprehensive picture of the virus.

Projecting and attempting to respond to future outbreaks through genome sequencing Van Heusden said, “Sadly, Covid-19 will not be the only disease that we will need to fight, so we need genome sequencing techniques to reconstruct a kind of family tree of viruses so we can better predict how and when an outbreak may happen in the future, so we can also be better prepared to fight what’s out there”.
Given the number of confirmed infections globally of 1.3 million means there’s relatively a small number of samples to be able to tackle the origin and behaviour of the virus to develop a vaccine on a global scale, data analysis the Johns Hopkins Coronavirus Resource Center suggests.

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2020-04-11T21:44:23+00:00
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