Quick Facts

• Up to 450,000 Americans may have alpha-gal syndrome, making it the 10th most common food allergy in the U.S.
• Livestock producers face occupational hazards beyond food allergies, including life-threatening reactions to animal fluids
• 78% of those diagnosed report distress about farm productivity, with 64% experiencing depression and 85% reporting anxiety

A tick-borne meat allergy is forcing American farmers and ranchers to abandon livestock operations that have been in their families for generations. Alpha-gal syndrome, transmitted primarily by lone star ticks, affects an estimated 450,000 people nationwide and creates severe occupational hazards for those working with cattle, pigs, sheep and goats.

The syndrome causes delayed allergic reactions 2-8 hours after consuming red meat or dairy products. For livestock producers, the condition extends far beyond dietary restrictions. Farmers can experience life-threatening reactions when exposed to animal blood or amniotic fluid during calving, carcass processing, or routine care.

“Alpha gal is killing our farm,” wrote Missouri farmer Antonia Florence. “The alpha gal allergy my husband, Bruce, contracted through lone star tick bites caused him to become allergic to the very cattle we raise.”

Between 2010 and 2022, more than 110,000 suspected cases were identified, though experts believe the actual number is much higher. In Missouri alone, between 7,300 and 34,000 residents may be affected since 2021.

The economic impact on farming operations is severe. Extension professionals report farmers have been forced to hire additional help, modify operations, or completely exit livestock production. Missouri farmer Jenna Olcott can no longer help with farm chores due to coughing, itching and watering eyes. She cannot even ride in a vehicle with her husband when he has manure on his boots.

The psychological toll is equally devastating. A study found 78% of diagnosed farmers worry about their operation’s productivity. Mental health impacts include depression in 64% of cases and anxiety in 85%. Farmers report feeling they can no longer properly care for their animals, which conflicts with core agricultural values.

Healthcare provider awareness remains low. Research shows 78% of providers know little about alpha-gal syndrome, and only 5% feel confident diagnosing and managing the condition. Patients wait an average of seven years for correct diagnosis.

Emergency situations create impossible choices for farmers. When livestock need immediate assistance during birthing complications, producers must decide between helping their animals and risking life-threatening allergic reactions.

Currently, no FDA-approved treatment exists. The standard recommendation is avoiding red meat and dairy products. Benjamin Casterline, an immunologist studying the condition, is using artificial intelligence to identify patterns in patient data through a grant from the Institute for Clinical and Translational Sciences.

Prevention efforts focus on tick control. Livestock producers can protect themselves and limit tick populations on their animals through insecticides, dewormers, and identifying problem pastures. Many farmers now wear gloves and respirators during animal care.

Missouri House Bill 1855, introduced in February 2026, would add alpha-gal syndrome to the state’s list of reportable diseases. The National Pork Board has funded research to identify knowledge gaps and develop better educational materials and prevention strategies.

Read more: Tick-borne meat allergy can affect livestock producers’ health and livelihood