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HPAI H5N1 Virus in Dairy Cattle – What We Know
In March 2024, Highly Pathogenic Avian Influenza (HPAI) A (H5N1), commonly referred to as bird flu, was confirmed in domestic U.S. livestock for the first time in a dairy operation in Texas. Since then, the virus has spread to 36 dairy operations across nine states, raising widespread uncertainty throughout the dairy and livestock markets. Industry participants have raised concerns about the outbreak's potential impact on consumer perception and demand for dairy and meat products, though government agencies reiterate that the national food supply remains safe. Urner Barry is closely monitoring the situation...
USDA Confirms Detection of Avian Influenza in Dairy Cattle in Colorado
Yesterday, the US Department of Agriculture’s (USDA) National Veterinary Services Laboratory (NVSL) confirmed a detection of Highly Pathogenic Avian Influenza (HPAI) H5N1 in dairy cows in Northeast Colorado. This is the first detection of avian influenza diagnosed in cattle in Colorado. Detections of HPAI in dairy cattle have occurred in eight other states.
On Monday, April 22, the Colorado State Veterinarian’s office received a notification of a dairy herd demonstrating clinical signs consistent with HPAI in cattle. Samples submitted to the Colorado State University Veterinary Diagnostic Laboratory tested presumptive positive for HPAI on April 24, and were confirmed by the USDA's National Veterinary Services Laboratory on April 25.
USDA Issues FAQ on Federal Order Requiring Bird Flu Testing in Dairy Cattle
On Wednesday, the U.S. Department of Agriculture (USDA) announced a Federal Order requiring mandatory testing of lactating dairy cattle for bird flu before interstate movement. Effective Monday, April 29, 2024, the order also mandates reporting positive influenza A test results in livestock to USDA’s Animal & Plant Health Inspection Service (APHIS).
Highly pathogenic avian influenza (HPAI) causes less severe illness in cattle than in poultry, in which the virus is typically fatal, but remains a concern for livestock and humans who come into contact with infected animals...
Cow-to-Cow Transmission Confirmed as a Factor in Spread of H5N1
In an update provided by the USDA, the agency confirmed that cow-to-cow transmission is a factor in the spread of H5N1 bird flu in dairy herds.
However, it remains unclear exactly how the virus is being moved around. “We know that the virus is shed in milk at high concentrations; therefore, anything that comes in contact with unpasteurized milk, spilled milk, etc. may spread the virus,” explained the USDA.
The government stressed the importance of biosecurity, including the movement of people, animals, vehicles, and...
Highly Pathogenic Avian Influenza Confirmed in North Carolina Dairy Herd
Highly pathogenic avian influenza (HPAI) was detected in a dairy herd in North Carolina on April 10, bringing the number of states with confirmed cases of HPAI in livestock to seven.
HPAI has previously been detected in nine dairy herds in Texas, three in Kansas, two in New Mexico, and one each in Michigan, Idaho, and Ohio. The movement of cattle from affected herds in these states to North Carolina has been suspended.
“This is an evolving situation, and we are waiting for more diagnostics from NVSL and will work collaboratively with our federal partners and dairy farmers in North Carolina,” said Agriculture Commissioner Steve Troxler...
States with HPAI-Infected Dairy Cows Grows to Six
A herd of dairy cattle in Ohio has been infected with highly pathogenic avian influenza (HPAI), increasing the number of states with dairy operations affected by the virus to six.
The Ohio Department of Agriculture (ODA) on April 3 announced it had received confirmation from the U.S. Department of Agriculture’s (USDA) National Veterinary Services Laboratory (NVSL) of HPAI infection in a dairy cattle herd in Wood County, Ohio.
The USDA previously confirmed the H5N1 strain of HPAI in dairy cattle on seven Texas farms, two in Kansas, and one each...
Second US Human Case of Avian Influenza H5N1 Linked to Dairy Cattle Exposure Confirmed
The United States has just confirmed a new case of a person testing positive for highly pathogenic avian influenza (HPAI) A(H5N1) virus in Texas, the country's second human case since a previous incident in Colorado in 2022. The patient had been exposed to dairy cattle presumed to be infected with H5N1, raising concerns amongst the livestock sector and related businesses. However, the Centers for Disease Control and Prevention (CDC) maintains the risk to the general public as low...
Commercial Broiler Flock in Nebraska Tests Positive for Bird Flu
A commercial broiler flock of 102,000 birds in Gage County, Nebraska recently tested positive for highly pathogenic avian influenza (HPAI). The detection was confirmed by the U.S. Department of Agriculture on February 6, marking the first outbreak in a commercial flock for the state since November 2022.
Several small WOAH poultry and non-poultry operations in Nebraska were affected by HPAI between December 2022 and December 2023.
“Nebraska hasn’t had any reported cases of HPAI for a few months so while we are disappointed, we are not surprised, to see another case...
More than 13,000 Turkeys Affected By HPAI in Indiana
A flock of 13,071 turkeys are being quarantined in Indiana after a commercial farm tested positive for the highly pathogenic avian influenza, commonly referred to as the Bird Flu. The outbreak was reported out of Daviess County and according to the USDA, is the first reported outbreak of a commercial flock in the state since December 2023.
The birds will be depopulated, and birds of nearby flocks will be tested in an effort to prevent the disease from spreading.
To further monitor the situation...
Bird Flu Detected in Several U.S. Commercial Turkey Flocks Last Week
Last week, several commercial turkey operations spanning four states reported positive detections of highly pathogenic avian influenza (HPAI), a highly contagious and often fatal disease in birds.
HPAI can be spread by direct or indirect contact with infected domestic or wild birds including ducks and geese. The disease can also be spread by contact with the virus on surfaces such as hands, shoes, clothing, and animal fur.
Poultry owners are urged to increase their biosecurity practices to protect their flocks, especially with fall migration underway.
California
On October 26, HPAI was detected in...
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