H5N1 Avian Influenza Detected in Texas Dairy Herd; Sick Child Source Investigation in California Remains Unclear

H5N1 avian influenza has been confirmed in a Texas dairy herd, raising total U.S. herd infections since 2024 to 1,079. Recent outbreaks also include commercial turkeys in South Dakota and North Dakota. Meanwhile, investigation into a California pediatric H5N1 case suggests environmental exposure rather than poultry consumption. Veterinarians are urged to monitor livestock for unusual signs, implement biosecurity measures, and support One Health surveillance to mitigate interspecies transmission.