tetano
Editor, Senior Moderator
Monika Z Ballmann[SUP]1[/SUP] 
, Luca Bordes[SUP]1[/SUP] , Kim M Bouwman[SUP]1[/SUP] , Marc Y Engelsma[SUP]1[/SUP] , Sandra Venema-Kemper[SUP]1[/SUP] , Sylvia BE Pritz-Verschuren[SUP]1[/SUP] , Rene Heutink[SUP]1[/SUP] , Marit Roose[SUP]1[/SUP] , Marcel AH Spierenburg[SUP]2[/SUP] , Arco van der Spek[SUP]2[/SUP] , Hendrik IJ Roest[SUP]3[/SUP] , Evelien A Germeraad[SUP]1[/SUP]
Abstract
In December 2025, highly pathogenic avian influenza (HPAI) H5N1 clade 2.3.4.4b genotype DI.2.1 virus was detected in a cat living on a dairy cattle farm. Milk and serum samples from the dairy cattle were tested for avian influenza virus. No viral RNA was detected; however, H5N1-specific antibodies were identified in serum samples from 34 (47.2%) of 72 lactating dairy cows and 24 (63.2%) of 38 youngstock. These demonstrate expansion of the mammalian host range of HPAI H5N1 in Europe.
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2026.31.25.2600464#html_fulltext
, Luca Bordes[SUP]1[/SUP] , Kim M Bouwman[SUP]1[/SUP] , Marc Y Engelsma[SUP]1[/SUP] , Sandra Venema-Kemper[SUP]1[/SUP] , Sylvia BE Pritz-Verschuren[SUP]1[/SUP] , Rene Heutink[SUP]1[/SUP] , Marit Roose[SUP]1[/SUP] , Marcel AH Spierenburg[SUP]2[/SUP] , Arco van der Spek[SUP]2[/SUP] , Hendrik IJ Roest[SUP]3[/SUP] , Evelien A Germeraad[SUP]1[/SUP] Abstract
In December 2025, highly pathogenic avian influenza (HPAI) H5N1 clade 2.3.4.4b genotype DI.2.1 virus was detected in a cat living on a dairy cattle farm. Milk and serum samples from the dairy cattle were tested for avian influenza virus. No viral RNA was detected; however, H5N1-specific antibodies were identified in serum samples from 34 (47.2%) of 72 lactating dairy cows and 24 (63.2%) of 38 youngstock. These demonstrate expansion of the mammalian host range of HPAI H5N1 in Europe.
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2026.31.25.2600464#html_fulltext