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: Substantive transcript sections audited: introductions and phylogeography; flyway diffusion; canonical vs non-canonical hosts; spillover into backyard and agriculture; policy implications and surveillance; limitations and caveats.- transcript topics: Introduction and scope of North American H5N1 epizootic; Phylogeographic analysis and number of introductions; Flyway diffusion and cross-continental spread; Canonical hosts (Anseriformes) vs non-canonical hosts; Persistence times in wild vs domestic birds; Spillovers to backyard and commercial poultry QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 8- 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 via Atlantic and Pacific flyways- Wild birds, especially Anseriformes, as primary drivers of transmission; non-canonical hosts largely dead-end- Domestic poultry outbreaks seeded by 46–113 independent introductions from wild birds- Backyard flocks infected ~9.6 days earlier than commercial poultry- Farm-to-farm transmission is a minor part of the current wave; external wild-bird introductions drive spillovers- East-to-west diffusion across flyways occurred more frequently than west-to-east (about 4.4×) 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