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Published on: November 10, 2023
The Differences in the Evolutionary Dynamics of MERS and SARS Coronaviruses
Yushan Ding1,2, Jiameng Liu1, Jamal S M Sabir3,4
1State Key Laboratory for Animal Disease Control and Prevention, Center for Emerging and Zoonotic Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV) and Middle East Respiratory Syndrome Coronavirus (MERS-CoV) exhibit distinct evolutionary dynamics. MERS-CoV shows easier animal-to-human spillover, complicating disease control due to its dromedary camel reservoir.
Area of Science:
- Comparative genomics and evolutionary virology
- One Health perspectives on zoonotic diseases
- Infectious disease epidemiology
Background:
- SARS-CoV and MERS-CoV are highly pathogenic human coronaviruses with significant mortality.
- Understanding their evolutionary differences is crucial for effective disease control strategies.
Purpose of the Study:
- To compare the evolutionary dynamics of SARS-CoV and MERS-CoV.
- To provide a One Health perspective on differences impacting disease control.
- To investigate MERS-CoV prevalence disparities between the Middle East and Africa.
Main Methods:
- Phylogenetic network analysis of SARS-CoV and MERS-CoV isolates.
- Comparison of MERS-CoV host-pathogen interactions.
- Analysis of dipeptidyl peptidase 4 (DPP4) gene sequences in human populations.
Main Results:
- SARS-CoV human isolates formed a distinct 'super-spreader' cluster separate from civet isolates.
- MERS-CoV from dromedary camels and humans clustered together, indicating frequent spillover.
- DPP4 gene sequences showed minimal variation across Egyptian, Sudanese, and Saudi Arabian populations.
Conclusions:
- MERS-CoV demonstrates more facile animal-to-human transmission compared to SARS-CoV.
- The dromedary camel reservoir for MERS-CoV presents significant disease control challenges.
- Observed MERS prevalence differences are likely due to surveillance and transmission factors, not DPP4 gene variations.
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