Unexpected Detection of Highly Pathogenic Avian Influenza (HPAI) H5N1 virus in bovine semen from a bull used for natural breeding on an affected dairy farm
Ailam Lim, Keith P. Poulsen, Leonardo Cardia Caserta, Lizheng Guan, Eryn Opgenorth, Maxwell P. Beal, Amie J. Eisfeld, Yoshihiro Kawaoka, Diego G. Diel
The paper reports the detection of HPAI H5N1 virus RNA in bovine semen from an asymptomatic bull during an outbreak, raising concerns about transmission risks and biosecurity.
bioRxiv · Oct 16, 2025 · PreprintMolecular Biology