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10:49
Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
Published on: January 28, 2019
Sequence analysis and evolution of group B rotaviruses.
Mustafizur Rahman1, Zahid M Hassan, Hasan Zafrul
1Laboratory of Virology, ICDDR,B, GPO Box-128, Dhaka 1000, Bangladesh. mustafizur.rahman@uz.kuleuven.ac.be
Virus Research
|February 13, 2007
Summary
Human group B rotaviruses in Bangladesh share genetic similarities with Indian strains, distinct from Chinese ones. These findings reveal insights into the evolution and origins of this important viral pathogen.
Area of Science:
- Virology
- Molecular Epidemiology
- Public Health
Background:
- Human group B rotaviruses (BoRV) are an emerging cause of gastroenteritis globally.
- Previous studies on BoRV epidemiology and genetic diversity are limited, especially in South Asia.
Purpose of the Study:
- To characterize the genetic diversity of human group B rotaviruses circulating in Bangladesh.
- To investigate the phylogenetic relationships of Bangladeshi BoRV strains with other global strains.
- To estimate the evolutionary rate and common ancestor of human BoRV.
Main Methods:
- Isolation and genetic sequencing of human group B rotaviruses from hospitalized patients in Bangladesh.
- Phylogenetic analysis of key gene segments: VP4, VP7, and NSP2.
- Estimation of evolutionary rate and time to the most recent common ancestor (TMRCA).
Main Results:
- Bangladeshi human BoRV strains exhibited greater genetic similarity to Indian strains than to Chinese strains.
- Human BoRV strains formed a distinct cluster, separate from animal strains.
- The evolutionary rate of the VP7 gene was estimated at 1.57x10^-3 nucleotide substitutions/site/year.
- The most recent common ancestor (MRCA) of human BoRV was estimated to be around 1976.
Conclusions:
- Human group B rotaviruses in Bangladesh are genetically related to strains in neighboring India.
- Human BoRV strains evolve rapidly, comparable to other RNA viruses.
- The findings provide crucial data for understanding the emergence and spread of group B rotaviruses.
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