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RNA virus populations as quasispecies
J J Holland1, J C De La Torre, D A Steinhauer
1Department of Biology, University of California, San Diego, La Jolla 92093-0116.
Current Topics in Microbiology and Immunology
|January 1, 1992
Summary
RNA viruses evolve rapidly due to high mutation rates, forming complex populations. This unpredictable evolution makes virus outbreaks difficult to forecast.
Area of Science:
- Virology
- Evolutionary Biology
- Pathogenesis
Background:
- RNA viruses exhibit high mutation frequencies, often near maximum tolerable levels.
- This leads to the formation of complex, indeterminate quasispecies populations within infected hosts.
- Such complexity influences viral evolution and disease dynamics.
Purpose of the Study:
- To explore the implications of high mutation rates and quasispecies complexity in RNA virus evolution.
- To understand the factors contributing to the unpredictability of viral evolution and outbreaks.
Main Methods:
- The study discusses theoretical frameworks of viral evolution.
- It analyzes the probabilistic nature of quasispecies formation.
- It reviews existing literature on RNA virus population dynamics.
Main Results:
- RNA virus mutation rates generally approach maximum tolerable levels, driving rapid evolution.
- Complex quasispecies populations arise probabilistically and vary between hosts.
- The composition and evolutionary trajectory of these populations are indeterminate.
Conclusions:
- The inherent complexity and probabilistic nature of RNA virus quasispecies populations make their evolutionary paths and disease impact unpredictable.
- Forecasting viral evolution and the timing of new outbreaks remains a significant challenge.