Re: Minnesota dairy herd infected for the second time

On 3/25/2025 6:33 PM, RonO wrote:

https://www.cidrap.umn.edu/avian-influenza-bird-flu/minnesota-milk- surveillance-flags-h5n1-dairy-herd
 A dairy herd in Minnesota that was confirmed to be infected in July 2024, but has likely been clear of the virus for several months has been infected again.  They do not know what genotype of H5N1 is infecting the herd.  Another herd in California also was confirmed to be positive.
 They still have not disclosed the genotypes of the recent Idaho and California infections.  At this time both the B3.13 and the D1.1 virus has been found in Dairy herds (D1.1 in Arizona and Nevada)
 Ron Okimoto
 

https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/hpai-confirmed-cases-livestock
Another California dairy has been added to the database.  3 Idaho, 2 Calif., and 1 Minnesota herd for this week, but no news on what genotype is infecting these herds since Feb.  For some reason they stopped disclosing the genotype when it could be either D1.1 (recent introduction from wild birds) or the B3.13 dairy virus.
The USDA disclosed the last two Nevada genotypes almost immediately (confirmed 2/25) as being D1.1, but since then they have not been disclosing the infecting genotype for the last 9 Idaho herds, 9 California herds, and 1 Minnesota herd.
Ron Okimoto