Mar 16, 2026

Tick-borne meat allergy can affect livestock producers' health and livelihood

Health

Tick-borne meat allergy can affect livestock producers' health and livelihood

From Harvest Public Media

By 

Rebecca A Smith

Tick-borne meat allergy can affect livestock producers' health and livelihood

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Alpha-Gal syndrome comes from tick bites. It causes severe allergies to some meat and dairy products. For some farmers and ranchers, it not only affects their health but also their livelihood.

AILSA CHANG, HOST:

One of the most dangerous animals on a farm is one of the tiniest, the lone star tick. A small bite can lead to what's called Alpha-gal syndrome, which can be especially hard on farmers in close contact with livestock every day. Harvest Public Media contributor Rebecca Smith explained.

REBECCA SMITH, BYLINE: It's a bright, crisp morning on the Love Lake Iris Farm in northern Missouri. Owner Sharon Pennington is standing in the barn where she's raised countless orphan calves and nurse cows over the years. But now, for the first time, the barn sits empty.

SHARON PENNINGTON: One cow calved and she had too much milk, so I was milking her and around all that fluid and just wondering, why in the world am I going to (laughter) pass out or die?

SMITH: Pennington was repeatedly experiencing anaphylaxis, a severe, full-body allergic reaction. And after months of fear and confusion, she was diagnosed in the summer of 2025 with alpha-gal, a potentially life-threatening allergic reaction to a sugar found in mammalian products, such as red meat and dairy, that comes from the bite of a lone star tick. But for her, these anaphylactic reactions weren't just from eating mammalian-based foods. They also occurred after handling her cattle and their bodily fluids.

PENNINGTON: I was thinking, I need to make sure my will's lined out. I don't know what's wrong with me.

SMITH: Doctors aren't sure if these severe reactions are due to alpha-gal syndrome or if the allergy is kicking the immune system into overdrive more generally.

SCOTT COMMINS: There's not great data.

SMITH: That's Dr. Scott Commins. He's an allergist at the University of North Carolina at Chapel Hill and one of the leading alpha-gal researchers in the country.

COMMINS: Patients are saying one thing and giving us reports of symptoms and reactions.

SMITH: Those symptoms can include full-body hives, trouble breathing, irritated eyes and even heart issues. He says there are some options for treatment, including medication, but it can cost thousands of dollars a month.

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