Abstract
We detected H5N1 high pathogenicity avian influenza in captive Greater Rhea (Rhea americana). Viral genetic analysis revealed the mammalian associated PB2-E627K mutation, indicating selection of mammalian-relevant mutations in ratites. Pathologic investigation of available tissues demonstrated severe multifocal necrotising inflammation, and a strong vasculotropism.
Competing Interest Statement
The authors have declared no competing interest.
Source: BioRxIV, https://www.biorxiv.org/content/10.1101/2025.09.08.674895v1
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