tetano
Editor, Senior Moderator
Emerg Infect Dis
. 2026 Apr 15;32(5).
doi: 10.3201/eid3205.251639. Online ahead of print.
Highly Pathogenic Avian Influenza A(H5N1) Virus RNA in Bovine Semen, California, USA, 2024
Ailam Lim, Keith Poulsen, Leonardo C Caserta, Lizheng Guan, Eryn Opgenorth, Maxwell P Beal, Amie J Eisfeld, Yoshihiro Kawaoka, Diego G Diel
Since March 2024, highly pathogenic avian influenza (HPAI) A(H5N1) virus has infected dairy cattle in the United States, prompting concern about novel transmission routes. During an outbreak in California, HPAI H5N1 RNA was detected in an asymptomatic bull's semen. Although infectious virus was not isolated, semen-associated transmission risks and biosecurity practices remain a concern.
Keywords: California; H5N1; United States; biosecurity; highly pathogenic avian influenza; influenza; respiratory infections; viruses.
. 2026 Apr 15;32(5).
doi: 10.3201/eid3205.251639. Online ahead of print.
Highly Pathogenic Avian Influenza A(H5N1) Virus RNA in Bovine Semen, California, USA, 2024
Ailam Lim, Keith Poulsen, Leonardo C Caserta, Lizheng Guan, Eryn Opgenorth, Maxwell P Beal, Amie J Eisfeld, Yoshihiro Kawaoka, Diego G Diel
- PMID: 41983964
- DOI: 10.3201/eid3205.251639
Since March 2024, highly pathogenic avian influenza (HPAI) A(H5N1) virus has infected dairy cattle in the United States, prompting concern about novel transmission routes. During an outbreak in California, HPAI H5N1 RNA was detected in an asymptomatic bull's semen. Although infectious virus was not isolated, semen-associated transmission risks and biosecurity practices remain a concern.
Keywords: California; H5N1; United States; biosecurity; highly pathogenic avian influenza; influenza; respiratory infections; viruses.