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10:35
Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus
Published on: May 31, 2020
Host heterogeneity dominates West Nile virus transmission
A Marm Kilpatrick1, Peter Daszak, Matthew J Jones
1Consortium for Conservation Medicine, New York, NY 10001, USA. kilpatrick@conservationmedicine.org
Proceedings. Biological Sciences
|August 25, 2006
Summary
Extreme host diversity drives West Nile virus (WNV) spread, with American robins acting as key super spreaders. Understanding host-vector contact is crucial for controlling WNV transmission.
Area of Science:
- Ecology
- Epidemiology
- Veterinary Medicine
Background:
- Host population heterogeneity significantly impacts pathogen transmission and control.
- Super spreading events, where a few individuals cause most infections, highlight transmission inequalities.
Purpose of the Study:
- To investigate the role of host community heterogeneity in West Nile virus (WNV) transmission dynamics.
- To identify key host species driving WNV amplification and transmission.
Main Methods:
- Analysis of host-vector contact rates and pathogen transmission.
- Quantification of WNV reproductive ratios in diverse host communities.
Main Results:
- WNV transmission is characterized by extreme host heterogeneity, leading to inflated reproductive ratios.
- American robins (Turdus migratorius) were identified as the primary WNV super spreader species.
- Mosquitoes showed varied host preferences, with crows being preferred at some sites and house sparrows avoided, but corvid importance was limited by rarity.
Conclusions:
- Host community structure, particularly the role of specific avian species like American robins, is critical for WNV amplification.
- Contact rates between vectors and hosts are essential for understanding and managing pathogen transmission dynamics.
- Current assumptions about WNV amplification by certain avian species need re-evaluation based on host-vector interactions.
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