Most people know that tick bites can cause Lyme disease. Fewer know that a single tick bite can permanently change what you're able to eat — potentially for the rest of your life.
Alpha-gal syndrome (AGS) is a serious, potentially life-threatening allergic condition triggered by a tick bite. It causes people to develop severe allergic reactions to red meat and other mammalian products. Cases are rising across the United States, and health officials in multiple states are now actively monitoring the surge.
In Kansas, the state Department of Health and Environment (KDHE) is tracking a rise in AGS cases among residents. While voluntary reporting means the full picture is incomplete — the KDHE has confirmed seven cases as of its most recent count — officials are clear that the actual number is likely higher. "This number should not be taken as an absolute representation of incidence in Kansas," Jill Bronaugh of the KDHE told 27 News.
In New Jersey in 2024, a pilot died after eating a hamburger while unknowingly carrying the condition — a stark illustration of just how serious AGS can become when it goes undiagnosed.
What Is Alpha-Gal Syndrome?
Alpha-gal (galactose-α-1,3-galactose) is a sugar molecule found in the bodies of most mammals — including cattle, pigs, and deer — but not in humans. According to the CDC, when a tick bites a person, it can transfer alpha-gal from its saliva into the bloodstream, triggering an immune response. Over time, that response can turn into a full allergy: the body begins attacking alpha-gal wherever it encounters it, including in food.
The lone star tick (Amblyomma americanum) is the primary tick responsible for transmitting AGS in the United States, according to the KDHE and the CDC. The lone star tick is widely distributed across the eastern, southeastern, and south-central United States — and its range is expanding alongside growing deer populations, since deer are its primary host.
"The most important thing to prevent AGS is to prevent tick bites," Bronaugh told 27 News. "It is not known how long a tick must be attached to elicit AGS in a person, so preventing that tick bite initially is really important."
What Are the Symptoms?
AGS symptoms typically appear two to six hours after a person eats red meat or other mammalian products. According to the KDHE, symptoms can include:
- Hives or itchy rash
- Stomach pain or cramps
- Nausea, vomiting, heartburn, or indigestion
- Cough, shortness of breath, or difficulty breathing
- Swelling of the lips, throat, tongue, or eyelids
- Anaphylaxis — a potentially life-threatening reaction requiring immediate medical attention
One of the complicating factors is that symptoms don't always occur consistently. "The symptoms of AGS can be challenging to recognize and are often said to be 'consistently inconsistent,' meaning that a person may not experience symptoms after every alpha-gal encounter or to all foods that contain alpha-gal," Bronaugh said.
The non-specific nature of the symptoms means AGS is frequently misdiagnosed or missed entirely, sometimes for years.
It's Not Just Red Meat
The list of products that can trigger a reaction in someone with AGS goes well beyond steak and burgers. According to the KDHE, people with the condition may also react to:
- Dairy products (milk, cheese, butter)
- Gelatin-based products
- Some medications that use gelatin as a carrier
- Certain candies (including products containing gelatin such as gummy candies)
A healthcare provider can diagnose AGS through a blood test that checks for alpha-gal IgE antibodies. People not experiencing symptoms do not need to be tested.
Who Should Be Concerned?
Anyone in a region where lone star ticks are active faces potential exposure. That includes the entire eastern half of the United States — Kansas, Missouri, Texas, Oklahoma, Arkansas, the Southeast, the Mid-Atlantic, and the Northeast including Long Island, where the lone star tick is particularly prevalent.
Kansas State Entomologist Brian McCornack and another Kansas resident, Greg Niemann, both discovered they had AGS after suffering dangerous allergic reactions that landed them in the emergency room, according to KSNT reporting. In both cases, the diagnosis came after the crisis — not before.
The CDC estimates that from 2010 through 2022, more than 450,000 Americans may have had AGS, and considers that figure likely an undercount given that the condition is not universally reportable.
Prevention Is the Only Reliable Protection
There is no treatment for AGS beyond avoiding exposure to alpha-gal and managing reactions when they occur. The condition sometimes resolves over time if a person avoids further tick bites — but for many, it is long-lasting.
That makes tick bite prevention the only real defense. The CDC recommends:
- Using EPA-registered insect repellents containing DEET or picaridin
- Treating clothing and gear with permethrin
- Doing thorough tick checks after any outdoor activity
- Removing ticks promptly and correctly — before they have the opportunity to transmit anything
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The stakes of a missed tick bite are higher than most people realize. Alpha-gal syndrome is proof of that.
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Sources: KSNT 27 News (Kansas alpha-gal syndrome reporting); Kansas Department of Health and Environment / Jill Bronaugh; CDC Alpha-Gal Syndrome guidance; New York State Department of Health; Asthma and Allergy Foundation of America
