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First H5N1 Detections in Swine in Oregon State
The U.S. Department of Agriculture (USDA) and Oregon state veterinary officials have confirmed a case of H5N1 in swine. The farm in Oregon is a backyard operation, with a mix of poultry and livestock, including swine. The swine were tested following detection in the poultry flock, the swine were not reportedly exhibiting symptoms. The livestock and poultry on this farm shared water sources and housing, which may have created the opportunity for transmission between species. The farm has been quarantined to prevent further spread of the virus.
Per USDA, this farm is a non-commercial operation, and the animals were not intended for the commercial food supply. USDA has affirmed that there is no concern about the safety of the nation’s pork supply as a result of this finding. As a reminder, the Food and Drug Administration (FDA) and USDA continue to emphasize that the commercial milk supply is safe because of the pasteurization process. USDA is also confident that the meat supply is safe.
In the past 30 days, the U.S. Department of Agriculture (USDA) National Veterinary Services Laboratories (NVSL) has confirmed the presence of HPAI (H5N1) in 152 dairy herds in two states. Access the full list of H5N1 detections in livestock.
To date, there have not been any detections of highly pathogenic avian influenza (HPAI) (H5N1) in Wisconsin cattle, poultry, or wildlife with the genotype associated with dairy cattle detections in other states.
USDA Dairy Testing Update
Requirements under the federal order continue to require lactating dairy cattle to receive a negative test for Influenza A virus at an approved National Animal Health Laboratory Network (NAHLN) laboratory using an NAHLN approved assay prior to interstate movement. Guidance had allowed for groups of 30 or more lactating animals to test a subset of 30 animals in a group moving interstate. Clarification has been provided that 30 head must be tested per group moving interstate together. This means a minimum of 30 cows tested per group per destination. If you have questions about what testing is required prior to sale or movement, please contact the Division of Animal Health: (608) 224-4872.
Human cases of H5 have been reported in the United States following exposure to dairy in cattle. The Wisconsin Department of Health Services continues to encourage those who work with animals or materials that could be potentially infected with novel influenza A viruses to take appropriate precautions and wear appropriate PPE according to the CDC guidance. Request PPE from the Wisconsin Department of Health Services medical stockpile.
As a reminder, prior to movement to a fair or exhibition in Wisconsin, lactating dairy cattle are required to receive a negative test for Influenza A virus at an approved National Animal Health Laboratory Network (NAHLN) laboratory using an NAHLN approved assay. Access the Wisconsin Lactating Dairy Cattle Movement to Fairs and Exhibitions Order. Access the FAQ.
Producers should continue to enhance their biosecurity efforts and monitor and control disease in their herds and flocks. DATCP is closely monitoring HPAI (H5N1) in dairy cattle and continues to encourage producers who notice unusual clinical signs in their cattle to work with their herd veterinarian. To report herds with unexplained symptoms, veterinarians should contact DATCP at (608) 224-4872 (business hours) or (800) 943-0003 (after hours and weekends).
Resources:
Wisconsin Department of Agriculture, Trade and Consumer Protection
Division of Animal Health
https://datcp.wi.gov
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