What Causes Alpha-Gal Syndrome?

Alpha-gal syndrome (AGS) has transitioned from a little-known condition into a growing public health concern in the United States. AGS, often referred to as the “red meat allergy,” is different from other food allergies because it is not triggered by direct exposure to allergens in certain foods, but by a tick bite.

Alpha-gal is a sugar molecule found in red meat (beef, pork, lamb, venison), dairy products, gelatin, animal-derived ingredients, and some medications and vaccines.  Alpha-Gal Syndrome (AGS) develops after a person is bitten by certain types of ticks, most commonly the Lone Star tick in the United States. These ticks carry the alpha-gal molecule in their saliva. When the tick bites, the molecule gets into a person's bloodstream and can trigger the immune system to produce antibodies against alpha-gal.   This causes an allergic reaction when the person later consumes foods containing this molecule.

The past decade has seen the expansion of the lone star tick into new areas, which in turn has increased the prevalence of AGS.  Originally found primarily in the Southeast United States, these ticks have been migrating into the Northeast, Midwest, and Mid-Atlantic areas of the country.  These shifts are driven by the expanding populations of deer, which carry the dicks as well as environmental changes. There have also been studies showing that other species of ticks, such as the blacklegged tic are also carriers for alpha gal.  At the same time, advances in immunoglobulin E (IgE) allergen testing have become central to identifying and managing this unusual condition.

What are the Symptoms of Alpha-Gal Syndrome?

Alpha Gal symptoms differ from other food allergies in that they are often delayed by several hours after consumption.  This makes it more difficult to link the symptoms to their trigger.  Symptoms can range from mild to severe and may vary from person to person. Common signs include:

• Skin reactions: Hives, itching, flushing
• Swelling: Lips, face, tongue, throat (angioedema)
• Digestive issues: Abdominal pain, nausea, vomiting, diarrhea
• Respiratory symptoms: Wheezing, shortness of breath
• Severe reactions: Dizziness, fainting, or anaphylaxis

Because AGS symptoms don’t always appear immediately, many people go undiagnosed for years. Early diagnosis empowers individuals to take control of their health. With proper testing and guidance, people with AGS can:

• Avoid trigger foods and reduce the risk of severe reactions
• Identify hidden sources of alpha-gal in medications or personal care products
• Work with healthcare providers to manage symptoms and carry emergency medications if needed
• Prevent worsening symptoms by avoiding future tick bites

How Long Does Alpha-Gal Syndrome Last?

In time, some people recover from Alpha-Gal Syndrome.  Their sensitivity can lessen over time.  This may take months or even years. This process can be helped by strictly avoiding red meat and not getting any more tick bites.  In others, the affliction can be lifelong, requiring ongoing management.  

Is there a test for Alpha-Gal Syndrome?

The increase in prevalence of AGS makes it even more important to accurately identify cases.  Blood tests can detect IgE antibodies against alpha-gal.  Results from these tests, coupled with symptoms and patient history, can allow doctors to make a positive diagnosis and develop a treatment plan. Not everyone bitten by a tick develops AGS, but repeated exposure increases the risk. If you experience unexplained allergic reactions 2-6 hours after eating red meat or dairy, especially if there is a history of tick exposure, you should be tested.  Testing can provide clarity and help you take control of your health. 

Testing is particularly important if:

• You have experienced delayed hives, swelling, or digestive issues after eating beef, pork, lamb, or dairy.
• You’ve experienced anaphylaxis (a rapid and severe allergic reaction) without a clear trigger.
• You live in or have traveled to areas where ticks are common.
• You’ve had multiple tick bites, even if you didn’t notice symptoms right away.

There are a few blood tests that can aid in identifying Alpha-Gal Syndrome.

• Alpha Gal Allergy Blood Test - Measures specific IgE antibodies to the alpha-gal molecule that indicate an allergic reaction. 
• Alpha Gal Allergy Panel - This test measures IgE antibodies to alpha-gal as well as several types of meat, including beef, pork, and lamb.  This is useful for differentiating between alpha-gal syndrome and other types of meat allergies.

How to get tested for Alpha-Gal Syndrome

Request A Test offers convenient, affordable testing options that anyone can order.  There's no need to get an order from your doctor, and no insurance is required.  Our allergy testing menu includes a full selection of blood tests, including the Alpha-Gal IgE test and Alpha-Gal Allergy Panel.  These tests are more convenient than the 2-step skin prick testing process since they only require one lab visit and usually see results in just a few days.

The alpha-gal test is crucial for diagnosing alpha-gal syndrome, as it allows individuals to identify their allergy and manage their dietary restrictions effectively. If you receive positive test results, follow up with a doctor to discuss treatment options and ways to manage your symptoms and avoid allergen triggers.

Why Request A Test?

• Affordable pricing
• Over 7,000 convenient nationwide locations
• Same-day testing and rapid results
• No doctor's order needed, we provide one
• No insurance is required

If you suspect Alpha-Gal Syndrome, don’t wait. Early testing can lead to better symptom control and peace of mind. Visit RequestATest.com to explore testing options and take the first step toward understanding your body’s response to this tick-borne allergy.

SOURCES:

https://www.vcuhealth.org/news/vcu-researchers-find-explosive-rise-in-tick-linked-meat-allergy-across-the-us/#:~:text=Alpha%2Dgal%20syndrome%20is%20triggered,analyses%20of%20AGS%20to%20date.

https://www.mayoclinic.org/diseases-conditions/alpha-gal-syndrome/symptoms-causes/syc-20428608

https://my.clevelandclinic.org/health/diseases/24493-alpha-gal-syndrome

https://www.cdc.gov/alpha-gal-syndrome/index.html

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