Reuters – A near-record number of U.S. chickens and turkeys have died in this year’s outbreak of avian influenza, as a different form of the virus than farmers battled before has infected more wild birds that then transmit the disease, officials said.
More than 47 million birds have died due to infections and culling. This has spurred export bans, lowered egg and turkey production, and contributed to record prices of the staples ahead of the U.S. holiday season.
Why it matters: The avian influenza virus affecting wild birds and commercial poultry flocks in North America and Europe is likely to stick around into 2023.
In 2015, 50.5 million birds died in the deadliest U.S. outbreak, the nation’s worst animal-health event to date.
Farmers are fighting a subtype of the H5N1 strain of the virus that survived over the summer, when rising temperatures typically reduce avian flu, said Rosemary Sifford, chief veterinary officer for the U.S. Department of Agriculture (USDA).
The same subtype, known as the goose/Guangdong lineage, is spreading in Europe, she said in an interview. Europe is already suffering its worst avian flu crisis, with nearly 50 million poultry culled.
Officials are finding the subtype in a broader range of wild birds than in the past and it seems to live in the birds longer, Sifford said. An elevated threat for infections may persist until summer 2023 as they migrate, she added.
The U.S. is monitoring wild birds for avian flu in four migration paths known as flyways, up from two previously, and plans to do the same next year.
“This virus could be present in wild birds for the foreseeable future,” Sifford said. “This one is certainly different.”
The outbreak has infected flocks in 42 states since February, twice as many as in 2015, USDA records show. Infections slowed over the summer this year but did not stop as they did in 2015.
The tenacity of the virus surprised some producers, who have boosted cleaning and security in barns since the 2015 outbreak.
“Unfortunately what we’ve done probably hasn’t been enough to protect us from this high load of virus in the wild bird population,” Sifford said.
Minnesota, the nation’s top turkey-producing state, suffered infections in two commercial flocks in late August after going three months without cases, USDA data show. The state then saw more cases in September.
“Seeing a spike in August was not something that was expected,” said Ashley Kohls, executive director of the Minnesota Turkey Growers Association.
After infections, it takes about six months to decontaminate farms and resume turkey production, Kohls said.
Minnesota-based Hormel Foods Corp., owner of the Jennie-O Turkey Store brand, said it expects avian flu to reduce its turkey production at least through March 2023.
“We’ve worked really hard but clearly this is still an issue,” Hormel CEO James Snee said on a conference call last month.
U.S. farmers, who face high costs for feed and labour, were already cutting production before the outbreak due to declining profits.
Inventories of turkey breasts in cold storage facilities reached a record low this year, USDA data show.
Indiana turkey farmer Greg Gunthorp said grocers, online retailers and other buyers have called him as they search for whole turkeys and breasts. Antibiotic-free turkey breasts are selling for US$7-$9 per pound wholesale, compared to about US$3 before the COVID-19 pandemic, he said.
“The turkey market right now is the craziest I’ve ever seen it,” Gunthorp said.