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Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b Virus and Mass Mortality in Eurasian Cranes, Germany, 2025.

Emerging infectious diseases - 1 May 2026

Günther Anne, Herrmann Christof, Sehl-Ewert Julia, Piro Simon, Ahrens Ann Kathrin, Calvelage Sten, Pohlmann Anne, Beer Martin, Harder Timm

Abstract excerpt

In autumn 2025, highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b virus, genotype EA-2024-DI.2.1, caused systemic infections leading to a mass mortality event among the western migrating subpopulation of Eurasian cranes (Grus grus) in Germany. Gregarious behavior at feeding and resting sites likely promoted rapid viral spread within the population.

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PMID: 42116621
DOI: 10.3201/eid3205.260170
PMCID: PMC13175094

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