Wednesday, 20th May , 2020, 04:37 pm,BDST
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Genome sequencing of more coronavirus samples



Prof Dr Samir Kumar Saha, Executive Director of Child Health Research Foundation (CHRF) that came in the limelight following the genome sequencing of novel coronavirus for the first time in Bangladesh, has stressed the need for the genome sequencing of its more samples to find out the dominant strain and know about the local mutation of  this virus. The sequencing of a good number of samples will help develop an effective vaccine for the country’s dominant strain and other strains of the coronavirus in the future, he said in an interview with UNB.

Where did it come from?

The CHRF executive director said though they could not concentrate on the study yet to find out the place where from their sequenced strain entered Bangladesh, they think this virus might have come from the United Kingdom. “Until now, we think this virus came from the United Kingdom. We’re almost sure about it. But the same strain was seen in Russia, Taiwan and Saudi Arabia,” he said. Putting emphasis on analysing more samples, the eminent microbiologist said, “When we’ll sequence more samples, we can know the names of the other countries alongside the UK, where from the viruses entered Bangladesh. Everything (finding) is important here. We can also know whether the virus mutates after entering our country and if the mutations improve our situation or deteriorate it.”

Finding a suitable vaccine 

Dr Samir Saha said he thinks if even Bangladesh gets a vaccine quickly it would not be before the end of this year or the early next year. “But we don’t know how many viruses will mutate by this time. If we can sequence some 100 strains, we would be able to know more. If we can sequence a larger number of strains, it would be better,” he said. “If we do so, then we’ll be able to understand which vaccine will be effective for the virus in our country or whether the vaccine will work against one virus or all viruses in our country. We can say which virus is dominant in our country,” he added.

Citing an example over changing a vaccine against a virus in the course of time, the scientist said the vaccine for influenza is modified in almost every year with the change of this flu virus in the USA. But the same vaccine is used for years in Bangladesh as it is not unknown what type of influenza is there in the country, Prof Samir added. He, however, said if all work together then it will be clear which vaccine is needed for influenza in Bangladesh.  About the CHRF, which was established in 2007, Prof Samir said the foundation has been working on genome sequencing for the last two years. “We’ve sequenced Chikungunya virus, pneumonia and influenza viruses, and recently that of dengue,” said Prof Samir Saha, who along with Dr Shahida Hasnain of Pakistan won the 2017 Carlos J. Finlay UNESCO Prize for Microbiology for their outstanding contributions to microbiology and its applications.

Dr Samir K Saha was given the American Society for Microbiology (ASM) Award in 2017 for research in Clinical Microbiology. It is the first time that the awardee was selected from a nation outside the developed world. Talking about his daughter Dr Senjuti Saha who led the genome sequencing of COVID-19 first in the country, Prof Samir said she went to Canada for higher study on completion O Level and A Level in Bangladesh. During her 12-year stay in Canada, Senjuti did PhD in Molecular Genetics on completion of under-graduation and graduation there. After obtaining PhD from the University of Toronto, Dr Senjuti moved back to Bangladesh to pursue a career that brings together basic science and public health.  She has been working with the CHRF laboratory team for the last four years. Her work is grounded in advancing the cause of health and research equity as she believes that everyone across the world should have equal access to the practice and benefits of science. Dr Senjuti also made a presentation on health and research equity at the Gates Goalkeepers event during the United Nations General Assembly in New York last year.

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