Archive · 3 Sep 2025
Alpha-Gal Syndrome on the Rise in the US: Understanding the Allergy
Imagine your body thinks the sugar molecule, Alpha-gal, found in meats like beef and pork, is a bad guy.
This is because of a tick bite.
The tick's saliva can trigger your body to make special defenders (antibodies) that attack Alpha-gal.
Even after the bite heals, these defenders are still there, ready to cause trouble when you eat those meats, leading to a serious allergy with symptoms like rashes and tummy troubles.
This illness, called Alpha-gal syndrome, is becoming more common in the US, mainly because of a particular tick.
It can also make it tricky to receive certain medical treatments.
Alpha-gal syndrome (AGS) is a rising tick-borne allergy in the US.
The allergy is triggered by a sugar molecule, alpha-gal, found in mammalian products.
Lone star tick bites are the primary cause of AGS in the US.
Common symptoms include rashes, fever, body pain, and gastrointestinal issues.
AGS cases are increasing and spreading geographically across the US.
- Who
- People are developing an allergy called Alpha-gal syndrome.
- What
- Alpha-gal syndrome, a tick-borne allergy, is increasing in the US.
- When
- Cases have been identified from 2010 to 2022, with a rise in recent years.
- Where
- Primarily in the South, East, and Central US, but spreading northward.
- Why
- Could be due to increased awareness, availability of testing, or a rise in tick populations.
- What is AGS?
- A tick-borne allergy to a sugar called alpha-gal found in mammal products.
- Primary Cause
- Lone star tick bites in the US.
- Common Symptoms
- Rashes, fever, body pain, nausea, vomiting, and hives.
- Geographic Spread
- Increasing in the South, East, Central states, and spreading north.
- Estimated Cases
- Over 110,000 suspected cases identified from 2010-2022; potentially 450,000 affected.
- Food Triggers
- Mammalian products like beef, pork, and dairy.