206: Wild Birds and the North American H5N1 Epizootic

Wild Birds and the North American H5N1 Epizootic Music:Enjoy the music based on this article at the end of the episode. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you’ll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/wild-birds-and-the-north-american-h5n1-epizootic ️ Episode:206: Wild Birds and the North American H5N1 Epizootic ️ Season:1 Article title:Ecology and spread of the North American H5N1 epizootic Journal:Nature DOI:10.1038/s41586-025-09737-x QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2025-11-22. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited substantive narrative segments: introduction to North American H5N1 epizootic, phylogeographic analysis and introductions, flyway diffusion, canonical vs non-canonical hosts, backyard vs commercial spillovers, and surveillance/limitations.- transcript topics: Introduction and scope of North American H5N1 epizootic; Phylogeographic analysis and number of introductions; Flyway diffusion across Atlantic, Mississippi, Central, and Pacific; Canonical hosts (Anseriformes) vs non-canonical hosts; Persistence times in wild vs domestic birds; Spillovers to backyard/commercial birds and their implications QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Nine introductions into North America from Europe/Asia- Anseriformes drive transmission; non-canonical hosts are largely dead-ends- 46–113 independent introductions into domestic birds from wild birds- Backyard birds infected about 9.6 days earlier than commercial poultry- Farm-to-farm transmission is a minor component; wild-bird introductions drive spillovers- Wild birds are the main engine; enhanced wild-bird surveillance is key QC result: Pass. Chapters (00:00:00) - North American bird flu: The genetics of the virus(00:04:03) - The map of bird flu spreads(00:06:07) - How Did the Zika virus get to North America?(00:09:09) - H5N1 spillover into poultry operations(00:14:07) - Signals on the Flyways