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Modeling The Lifecycle Of Ebola Virus Under Biosafety Level 2 Conditions With Virus-like Particles Containing Tetracistronic Minigenomes
Published on: September 27, 2014
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Elucidating variations in the nucleotide sequence of Ebola virus associated with increasing pathogenicity
Genome Biology
|November 23, 2014
Summary
Ebola virus (EBOV) passage in guinea pigs increased its virulence and led to genetic changes. This suggests EBOV evolution in new hosts can enhance disease severity, potentially prolonging epidemics.
Area of Science:
- Virology
- Evolutionary Biology
- Pathogen Adaptation
Background:
- Ebolaviruses cause severe hemorrhagic fever with high fatality rates.
- The current West Africa outbreak is the largest recorded Ebola virus outbreak.
- Concerns exist regarding Ebola virus adaptation for enhanced human-to-human transmission.
Purpose of the Study:
- To investigate genetic changes in Ebola virus during adaptation to a new host.
- To determine if serial passage in guinea pigs alters Ebola virus virulence.
Main Methods:
- Guinea pigs were infected with Ebola virus (EBOV).
- Virus was serially passaged five times in naive guinea pigs.
- RNA sequencing and consensus mapping analyzed viral nucleotide changes at each passage.
Main Results:
- Ebolavirus virulence increased with serial passage in guinea pigs.
- Clinical effects were observed in guinea pigs after passage.
- RNA editing and coding changes in key proteins were identified in passaged EBOV.
Conclusions:
- Ebolavirus (EBOV) becomes more virulent upon passage in a guinea pig model.
- Adaptation in a new host can lead to increased virulence.
- Increased EBOV virulence may contribute to prolonged, uncontrolled epidemics.
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