Beyond the Allergy: What Happens When We Compare Alpha-gal Syndrome to Other Diseases?

For many people, Alpha-gal Syndrome (AGS) is described as a delayed allergic reaction to mammalian meat. Public education has understandably focused on the immediate allergic manifestations of the condition, including hives, gastrointestinal symptoms, swelling, difficulty breathing, and anaphylaxis.

Those reactions are real, well documented, and can be life-threatening. However, after reviewing more than 3,000 patient-reported responses submitted to the Tick Bite Data registry, another picture has emerged.

Participants consistently describe a much broader spectrum of symptoms that extend beyond the acute allergic reactions commonly associated with Alpha-gal Syndrome. Neurological, musculoskeletal, cardiovascular, gastrointestinal, and constitutional symptoms appear repeatedly throughout our registry, often persisting long after dietary changes have been made.

Patient-reported data cannot determine biological mechanisms or establish cause and effect. What it can do is identify recurring patterns across large populations. Those patterns can generate important scientific questions and help guide future research.

To better understand what our participants were reporting, we compared the symptom profile observed in our registry with published descriptions of several well-characterized tick-borne illnesses, selected autoimmune diseases, and publicly available educational information from the Centers for Disease Control and Prevention (CDC).

The results were striking.

Comparison 1. Alpha-gal Syndrome Compared with Other Tick-Borne Diseases

Alpha-gal Syndrome begins with a tick bite, yet it is often discussed separately from other tick-borne illnesses.

When we compared the symptoms reported by participants in the Tick Bite Data registry with published descriptions of Lyme disease, ehrlichiosis/anaplasmosis, and babesiosis, we observed substantial overlap across multiple body systems.

The similarities shown above do not indicate that these diseases share the same cause. Instead, they illustrate that many individuals with Alpha-gal Syndrome report a symptom burden that extends well beyond the classic allergic presentation.

Comparison 2. Alpha-gal Syndrome Compared with Autoimmune Diseases

Next, we compared our patient-reported findings with published symptom profiles for celiac disease, systemic lupus erythematosus (SLE), and multiple sclerosis (MS).

These comparisons are not intended to suggest that Alpha-gal Syndrome is an autoimmune disease. Rather, they highlight that the symptom burden reported by registry participants overlaps with several chronic immune-mediated conditions, raising important questions for future research. This also highlights cases where anaphlaxis and food-triggered symptoms may not be as prevalent in some patients leading healthcare providers to diagnose them with another disease; those in the above chart were leading the misdiagnosis data from our survey.

Comparison 3. Tick Bite Data Registry Compared with Current CDC Educational Materials

Finally, we compared the symptoms reported by our participants with those currently described in CDC educational information on Alpha-gal Syndrome.

The CDC appropriately emphasizes the established allergic manifestations of Alpha-gal Syndrome. Our registry confirms those experiences while also documenting a broader range of patient-reported neurological, cardiovascular, musculoskeletal, and constitutional symptoms.

Why These Comparisons Matter

None of these comparisons prove that Alpha-gal Syndrome is an autoimmune disease. They do, however, demonstrate that thousands of individuals living with Alpha-gal Syndrome consistently report a multisystem illness that extends well beyond delayed allergic reactions to mammalian products. Many of these recurring healthcare experiences are not yet widely reflected in educational materials or routine clinical discussions of Alpha-gal Syndrome. As a result, healthcare professionals who have limited experience caring for patients with Alpha-gal Syndrome may not recognize the full spectrum of symptoms described by respondents, which may contribute to the diagnostic delays and misdiagnoses.

That broader symptom profile may help explain one of the most important findings from the Tick Bite Data registry: 66.6% of respondents reported being initially misdiagnosed before ultimately receiving an Alpha-gal Syndrome diagnosis.

When patients present with symptoms such as persistent fatigue, brain fog, headaches, dizziness, joint pain, muscle aches, weakness, gastrointestinal complaints, or cardiovascular symptoms, clinicians may understandably consider a wide range of conditions before recognizing Alpha-gal Syndrome. The overlap in symptom profiles shown throughout this article illustrates why diagnosis can be challenging, particularly when the possibility of Alpha-gal Syndrome is not considered.

This does not suggest that every patient with these symptoms has Alpha-gal Syndrome, nor does it imply that Alpha-gal Syndrome is the same as Lyme disease, an autoimmune disease, or any other condition discussed here. Rather, it demonstrates that the clinical presentation reported by many patients is broader than the classic allergic symptoms commonly associated with the condition.

Large patient registries have historically played an important role in identifying emerging disease patterns, refining clinical understanding, and generating hypotheses for future research. By documenting patient experiences at scale, registries can help identify trends that may otherwise go unrecognized in individual clinical encounters.

As additional patient-reported data and clinical research become available, we hope these observations encourage continued collaboration between patients, clinicians, researchers, and public health agencies to better understand the full clinical spectrum of Alpha-gal Syndrome and improve recognition of the disease in clinical practice.

Ultimately, this article is not about proving that Alpha-gal Syndrome is another tick-borne illness or an autoimmune disease. It is about recognizing patterns, asking better scientific questions, and ensuring that patient experiences help shape future research.

For generations, tick bites have often been treated as little more than an annoyance—a nuisance easily forgotten once the tick was removed. Today, the evidence tells a different story.

Whether through Alpha-gal Syndrome, Lyme disease, ehrlichiosis, babesiosis, or other emerging tick-associated conditions, we now know that a single tick bite has the potential to alter a person's health in ways we are still working to understand.

The days of removing a tick with the same indifference as brushing away a mosquito are over.

Every patient story adds another piece to the puzzle. Every survey strengthens our understanding. Every scientific question brings us one step closer to improving diagnosis, advancing research, and helping future patients receive the answers they deserve.