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Updated: Jun 1, 2026
06:41
Mosquito-Associated Virus Isolation from Field-Collected Mosquitoes
Published on: August 31, 2022
An insect nidovirus emerging from a primary tropical rainforest
Florian Zirkel1, Andreas Kurth, Phenix-Lan Quan
1Institute of Virology, University of Bonn Medical Center, Bonn, Germany.
Mbio
|June 16, 2011
Summary
Researchers discovered Cavally virus (CAVV), the first insect-associated nidovirus, in Côte d'Ivoire's rainforests. This finding highlights rainforests as reservoirs for novel viruses and impacts of habitat disturbance on virus emergence.
Area of Science:
- Virology
- Microbial Ecology
- Tropical Biology
Background:
- Tropical rainforests harbor significant biodiversity, potentially including undiscovered microbial life.
- Ecosystem exploitation can increase the risk of novel pathogen emergence.
- Mosquitoes are vectors for numerous viral diseases.
Purpose of the Study:
- To discover and characterize novel viruses in tropical rainforest ecosystems.
- To investigate the impact of anthropogenic disturbance on virus diversity and prevalence.
- To determine the evolutionary origins and genomic features of a newly identified virus.
Main Methods:
- Virus surveillance in mosquito populations across an anthropogenic disturbance gradient in Côte d'Ivoire.
- Phylogenetic analysis and ancestral state reconstruction to infer virus origins.
- Genomic sequencing and analysis of the novel virus, Cavally virus (CAVV).
Main Results:
- Cavally virus (CAVV), the first insect-associated nidovirus, was discovered with a 9.3% prevalence in mosquitoes.
- CAVV originated in pristine rainforests and spread to agricultural and human settlement areas.
- Habitat disturbance correlated with decreased virus diversity and increased CAVV prevalence.
- Genomic analysis revealed CAVV possesses characteristics of the order Nidovirales, suggesting a novel family.
Conclusions:
- Insect-associated nidoviruses represent a novel viral group, likely a new family within Nidovirales.
- Tropical rainforests are critical reservoirs for undiscovered viral diversity.
- Anthropogenic disturbance significantly alters virus dynamics, potentially increasing pathogen risk.
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