Another US State Detects H5N1 Avian Influenza Virus in Dairy Cattle

The US Department of Agriculture (USDA) confirmed on the 15th that the highly pathogenic H5N1 avian influenza virus was detected in a dairy herd in Nebraska. This marks the first time the virus has been found in dairy cattle in the state.

In a statement, the USDA stated that the detected virus is of the H5N1 subtype, clade 2.3.4.4b, with a B3.13 genotype. The detection resulted from epidemiological tracing and investigations conducted by state authorities.

The USDA emphasized that this incident does not pose a threat to consumer health nor affect the safety of commercial milk supplies. With the autumn migratory bird season approaching, the department urged dairy farms to enhance biosecurity measures to prevent the spread of avian influenza.

USDA data show that since March 2024, when highly pathogenic avian influenza was first detected in US dairy cattle, 17 states have reported related cases. However, only a few states have reported new infections this year.

The US Centers for Disease Control and Prevention (CDC) stated that the H5N1 avian influenza virus currently spreading among US poultry and dairy herds poses a low risk to the general public. However, individuals with occupational or recreational exposure to infected birds or mammals are at higher risk of infection and should take protective measures.