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The relationships between West Nile and Kunjin viruses
J H Scherret1, M Poidinger, J S Mackenzie
1Department of Microbiology and Parasitology, University of Queensland, Brisbane, Queensland 4072, Australia.
Emerging Infectious Diseases
|October 5, 2001
Summary
West Nile (WN) and Kunjin (KUN) viruses are closely related Flaviviruses. Genetic and antigenic analyses reveal distinct subgroups within these viruses, clarifying their complex relationship.
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- West Nile (WN) virus and Kunjin (KUN) virus were previously considered distinct Flavivirus types.
- Emerging genetic and antigenic data suggest a more complex relationship between WN and KUN viruses.
Purpose of the Study:
- To clarify the complex relationship between West Nile virus and Kunjin virus.
- To genetically and antigenically characterize diverse isolates of WN and KUN viruses.
Main Methods:
- Sequence analysis of 32 KUN virus isolates and 28 WN virus isolates.
- Geographic diversity of isolates included Australian KUN and WN viruses, and a Malaysian KUN virus.
- Antigenic characterization of KUN and WN virus isolates.
Main Results:
- KUN virus isolates from Australia formed a distinct, tightly grouped cluster.
- WN virus isolates showed significant genetic divergence, forming four distinct groups.
- Australian KUN virus isolates were antigenically homologous and distinct from WN virus isolates.
Conclusions:
- KUN and WN viruses represent a group of closely related viruses.
- Genetic and antigenic analyses can differentiate subgroups within the WN/KUN virus complex.
- This study refines the classification and understanding of Flavivirus diversity.