Zhang X, Lam SJ, Chen LL, Fong CH, Chan WM, Ip JD,. Avian influenza virus A(H5N1) genotype D1.1 is better adapted to human nasal and airway organoids than genotype B3.13. J Infect Dis. 2025 Nov 24:jiaf598
Three critically ill or fatal avian influenza A(H5N1) human infections have been reported in North America since November 2024. Notably, all were infected with genotype D1.1 instead of B3.13, the dominant genotype before November 2024. Here, we demonstrated that D1.1 could replicate to higher titers in human nasal and airway organoid-derived transwell monolayers from 6 donors. D1.1 exhibited a better binding to α2,3- and α2,6-linked SA than B3.13. No significant differences in most inflammatory or antiviral cytokines/chemokines was observed. These observations suggest that D1.1 is better adapted to both the upper and lower human respiratory tract epithelium than B3.13.
See Also:
Latest articles in those days:
- Host Species Contribution to the Spatiotemporal Dynamics of the 2024-2025 H5N1 Epidemic in Italy 15 hours ago
- mRNA-based influenza vaccine expands the B cell response breadth in humans 15 hours ago
- Molecular surveillance and predictive risk modelling of avian influenza virus in wild birds in Egypt 15 hours ago
- Germany as a key transit hub for the emergence and spread of high pathogenicity avian influenza H5 clade 2.3.4.4b reassortants in Europe 2 days ago
- Degradation of ACSL3 by influenza A virus shifts unfolded protein response from antiviral defense to viral evasion 2 days ago
[Go Top] [Close Window]


