Tick-Borne Illness — What You Need to Know Before You Go Outside

YOUR HEALTH — Issue No. 12

Tick-Borne Illness — The Lone Star Tick, Alpha-Gal Syndrome, and What's Happening in Your Own Backyard

A note on this week's issue: Alpha-gal syndrome was not originally on my editorial calendar. But over the past several months I have had more patients ask about tick bites than I have in years. Combined with the data showing a dramatic increase in cases across our region — I felt this topic needed to be covered.

If you spend any time outdoors in East Texas, Arkansas, or North Louisiana — this issue is for you.

Tick-borne illness is not a rare or exotic problem. It is a growing public health concern affecting millions of Americans — and the numbers have been climbing steadily for decades. Between 2004 and 2019, reported tick-borne disease cases more than doubled in the United States — from approximately 22,500 cases to over 50,800 cases annually. Those are only the cases that were diagnosed and reported. The true number is almost certainly higher.

Most people think of ticks as a nuisance. The reality is that a single tick bite can trigger a condition that changes what you eat for the rest of your life — and most patients go undiagnosed for months or years before anyone thinks to check for it.

This issue covers the tick responsible, the conditions it carries, and the one condition your provider may not have considered.

The Lone Star Tick — what it is and why it matters

There are several tick species in the United States capable of transmitting disease to humans. In the South and Southeast — including East Texas, Arkansas, and North Louisiana — the lone star tick is the most relevant and the most aggressive.

The lone star tick transmits Bourbon virus, Ehrlichia chaffeensis and Ehrlichia ewingii — which cause ehrlichiosis — Heartland virus, tularemia, and is associated with alpha-gal syndrome. It is one of the most disease-carrying ticks in the country — and unlike many other tick species, it actively hunts its hosts rather than waiting to be brushed against.

Lone star ticks move three times as fast as a blacklegged tick and will actively pursue a host. They are aggressive, they are common, and they are expanding their range.

How to identify a lone star tick:

The female lone star tick is brown with a single silver-white spot on her back — approximately 3/16 of an inch long when unfed, expanding to approximately 7/16 of an inch when fully engorged. The white spot is the defining feature — it is where the name "lone star" comes from, referring to the spot itself, not to Texas.

Male lone star ticks have varied white streaks or spots around the margins of their backs rather than a single central spot.

The lone star tick bites painlessly and commonly goes unnoticed, remaining attached to its host for as long as seven days. Many patients who develop tick-borne illness never recall being bitten.

The CDC maintains a detailed tick identification guide with photographs at cdc.gov/ticks — search "lone star tick" to see exactly what to look for at each life stage.

Why the lone star tick is expanding:

The lone star tick's range has grown significantly over the past several decades — and the primary driver is not climate alone. The lone star tick has repopulated its historical range across the eastern United States largely due to the expansion of white-tailed deer populations following conservation measures and deer relocation programs since the 1940s. White-tailed deer are the primary host of adult lone star ticks — where deer populations grow and spread, lone star ticks follow.

Alpha-Gal Syndrome — the tick bite that changes what you eat

Alpha-gal syndrome is the condition most commonly associated with the lone star tick — and one of the most underdiagnosed conditions in medicine right now.

The basic story sounds almost impossible: a tick bite triggers an allergy to red meat. Weeks or months after the bite. With no obvious connection between the two events.

That is exactly what happens — and here is how.

The mechanism:

When a lone star tick bites you, it injects saliva containing a sugar molecule called alpha-gal (galactose-alpha-1,3-galactose) into your bloodstream. This sugar molecule is found in all non-primate mammals — meaning it exists in beef, pork, lamb, venison, and other red meats, as well as in dairy products and gelatin.

In some people — not all — the immune system mounts a response to this foreign sugar molecule. It produces IgE antibodies against alpha-gal. From that point forward, every time that person eats red meat or another alpha-gal containing product, their immune system responds as if under attack.

The result is an allergic reaction — sometimes mild, sometimes severe, sometimes anaphylactic.

What makes alpha-gal syndrome different from a typical food allergy:

Most food allergies trigger a reaction within minutes of exposure. Alpha-gal syndrome is different. The reaction typically begins two to six hours after eating — often in the middle of the night if the triggering meal was dinner. This delay is one of the primary reasons the diagnosis gets missed. Patients report hives, stomach cramps, vomiting, and diarrhea — and by the time they connect the symptoms to what they ate hours earlier, the connection to red meat is not obvious.

Many patients are evaluated for irritable bowel syndrome, gastroesophageal reflux, anxiety, and a range of other conditions before anyone checks for alpha-gal.

How common is it:

Between 2010 and 2022, over 110,000 suspected cases of alpha-gal syndrome were identified in the United States. However, the true number may exceed 450,000 due to underdiagnosis and lack of awareness among both patients and providers. Cases are accelerating — nearly as many were identified in the last four years of that period as in the previous eight years combined.

Symptoms — what to look for:

Symptoms typically appear two to six hours after consuming red meat or other alpha-gal containing products. They include:

Symptoms vary widely between individuals — and even in the same individual between exposures. Some reactions are mild. Others are severe. The unpredictability is part of what makes this condition particularly challenging to manage.

Diagnosis:

Alpha-gal syndrome is diagnosed with a blood test — specifically an alpha-gal IgE level. If you or your provider suspects alpha-gal syndrome based on your symptoms and history — ask specifically for this test. It is not part of a standard allergy panel and will not be detected by routine bloodwork.

A positive alpha-gal IgE level in the setting of consistent symptoms and a history of tick exposure confirms the diagnosis.

Management:

There is currently no cure or treatment for alpha-gal syndrome. Management centers on avoidance and preparedness.

Avoid:

Preparedness:
Patients with alpha-gal syndrome should carry an epinephrine auto-injector (EpiPen) — particularly those who have experienced severe reactions. Discuss this with your provider.

Resources:
For patients diagnosed with alpha-gal syndrome — alphagalinformation.org is the most comprehensive patient resource available. It covers the full avoidance list, hidden sources of alpha-gal, travel guidance, and community support. It is free.

Preventing additional tick bites:
Every additional lone star tick bite carries the potential to worsen alpha-gal sensitivity. Preventing future bites is not optional — it is part of managing the condition.

Tick prevention — what actually works

Regardless of alpha-gal syndrome, tick prevention is worth taking seriously in our region year-round.

Effective strategies:

Tick removal:
Use fine-tipped tweezers to grasp the tick as close to the skin as possible. Pull upward with steady, even pressure — do not twist or jerk. Do not use petroleum jelly, nail polish, or heat to remove a tick. Clean the bite area with rubbing alcohol or soap and water after removal.

The sooner a tick is removed the better — though lone star ticks can transmit some pathogens even with brief attachment periods.

The Member deep-dive this week covers why tick-borne illness is so frequently missed and misdiagnosed, the full alpha-gal avoidance list including medications that contain alpha-gal, whether alpha-gal syndrome can resolve over time, and a comparative clinical breakdown of the three other tick-borne illnesses most relevant to our region — Rocky Mountain spotted fever, ehrlichiosis, and Lyme disease — including key differences in presentation, diagnosis, and treatment.

Next week: Thyroid — a full Plain Medicine deep-dive on one of the most misunderstood and over-blamed glands in the body.

Plain Medicine is published for educational purposes only and does not constitute medical advice or establish a patient-provider relationship. Always consult your healthcare provider before making medical decisions.

— Kyle