You step outside. A tiny tick bites you. You may not even feel it. A few weeks later, you eat a burger. And then, hours later, you break out in hives. Your throat swells. You rush to the hospital.
This is not made up. It is called alpha-gal syndrome. A tick bite can make your body treat red meat like poison.
The tick most responsible for this in the United States is the lone star tick. It has a white dot on its back. It lives across the South and Southeast, including South Texas.
Here is what happens. The tick bites a deer or another animal first. It picks up a sugar molecule called alpha-gal from that animal's blood. When that same tick bites you, it delivers alpha-gal into your bloodstream. Your immune system sees it as an enemy. It fights it.
The next time you eat red meat, your body sees that same sugar molecule again. It attacks. That is when the reaction hits.
The reaction is different from most food allergies. It does not happen right away. It usually shows up two to six hours after eating meat, pork, lamb, or venison. Some people also react to dairy, gelatin, or even some medicines that come from mammals.
Symptoms can range from hives and stomach pain to a life-threatening reaction. Your blood pressure can drop. Your throat can close. It is serious.
The CDC says more than 110,000 suspected cases were found between 2010 and 2022. But researchers think as many as 450,000 Americans may be affected. Many cases go undiagnosed for years because the link to a tick bite is not obvious.
There is no cure yet. If you have alpha-gal syndrome, you must avoid red meat and related products.
Researchers are working on treatments. But they are years away. For now, the only way to protect yourself is to avoid tick bites. Wear long sleeves and pants in wooded or grassy areas. Use bug spray. Check your body after being outside. Remove ticks fast and carefully.
South Texas is home to the lone star tick. This is not a far-off problem. It is right here.
