More Than 200 Alpha-Gal Syndrome Cases Reported in Delaware: What Residents Should Know
A tick bite can do more than cause itching. For some people, it can trigger a serious allergy to red meat and other products made from mammals. This condition is called alpha-gal syndrome, or AGS, and Delaware health officials are paying closer attention. According to DNREC and the Delaware Division of Public Health, more than 200 cases of alpha-gal syndrome have been reported to DPH since it became reportable in Delaware in 2024. Officials noted that the increase is connected, in part, to increased testing. That number matters because alpha-gal syndrome is still unfamiliar to many people. It is not the same as Lyme disease. It is not a typical infection. And it can change the way a person reacts to foods they may have eaten their whole life.
For Delaware residents, especially those who spend time outdoors in wooded, grassy, or brushy areas, this is a condition worth understanding.
What Is Alpha-Gal Syndrome?
Alpha-gal syndrome is a serious, potentially life-threatening allergy that can develop after a tick bite. CDC explains that alpha-gal is a molecule found in most mammals, such as cows and pigs, but not in people. It can also be found in the saliva of some ticks. When a tick bites, it may transfer alpha-gal into a person’s blood. The immune system can then identify alpha-gal as a threat. Later, when that person eats red meat or is exposed to other mammal-derived products, the body may react. That is why alpha-gal syndrome is sometimes called red meat allergy or tick bite meat allergy.
In plain language: a tick bite can make some people allergic to beef, pork, lamb, venison, dairy, gelatin, or other products made from mammals.
Why This Matters in Delaware
Delaware is a tick-heavy state, and tick awareness is now a year-round issue. DNREC and DPH say ticks are active in Delaware year-round, not just during warmer months. They can be found in wooded, brushy, and grassy areas. While 19 tick species have been identified in Delaware, a smaller group accounts for most human bites, including the blacklegged tick, lone star tick, and American dog tick. That matters because the lone star tick is the main tick associated with alpha-gal syndrome in the United States. CDC also notes that most reported AGS cases occur in the South, East, and Central states, where lone star ticks are most commonly found.
Delaware’s own tick information also identifies the lone star tick as the main species associated with alpha-gal syndrome in the United States and notes that not everyone bitten by a lone star tick will develop the allergy.
Alpha-Gal Is Different From Other Tick-Borne Illnesses
Many tick-borne illnesses are caused by bacteria, viruses, or parasites. Alpha-gal syndrome is different.
Delaware’s tick-associated disease information explains that alpha-gal syndrome is not caused by a pathogen or infectious agent. Instead, it begins with a tick bite that triggers an immune reaction to later exposure to mammalian meat and related products, such as dairy or gelatin.
That difference is important.
With Lyme disease or ehrlichiosis, doctors may think about antibiotics depending on the diagnosis. With alpha-gal syndrome, the issue is an allergy. CDC says AGS should be managed under the care of an allergist or another healthcare provider, and many patients are advised to avoid mammalian meat and sometimes other alpha-gal-containing products.
What Symptoms Can Look Like
Alpha-gal reactions can vary from person to person. Some reactions are mild. Others can be severe or life-threatening.
CDC says symptoms usually appear 2 to 6 hours after exposure to products containing alpha-gal, such as red meat or dairy products. This delay is one reason AGS can be confusing. A person may eat dinner, feel fine for a while, and then react hours later.
Possible symptoms include:
- Hives or itchy rash
- Nausea or vomiting
- Severe stomach pain
- Heartburn or indigestion
- Diarrhea
- Coughing, shortness of breath, or difficulty breathing
- Drop in blood pressure
- Swelling of the lips, throat, tongue, or eyelids
- Dizziness or fainting
- Anaphylaxis, which is a severe allergic reaction
Delaware’s tick disease information also lists symptoms such as rash, hives, itchiness, gastrointestinal upset, joint pain, and dizziness, with reactions often delayed after eating mammalian meat products.
Why Cases May Be Showing Up More Often
Delaware officials specifically point to increased testing as part of the reason more than 200 alpha-gal syndrome cases have been reported since AGS became reportable in the state in 2024. Nationally, CDC has also identified AGS as an emerging public health issue. A CDC MMWR report found that suspected AGS cases increased substantially since 2010, and that states with established lone star tick populations were most affected. The report also noted that more surveillance, provider education, and public health outreach are needed in high-risk areas.
A 2025 article titled “Alpha-Gal on the Rise: The Alarming Growth of Alpha-Gal Syndrome in High-Risk Regions” also frames mammalian meat allergy and alpha-gal syndrome as a growing public health concern, especially in high-risk regions where tick exposure is common.
For Delaware, this makes the local numbers even more important. More testing may be finding cases that previously went undiagnosed or misunderstood.
Foods and Products That May Cause Problems
For many people with alpha-gal syndrome, the biggest concern is mammalian meat.
That can include:
- Beef
- Pork
- Lamb
- Venison
- Rabbit
Some people may also react to:
- Dairy products
- Gelatin
- Certain medications
- Other products made from mammals
CDC notes that people with AGS may not react to every product containing alpha-gal, and reactions can vary even when a person is exposed to the same product more than once.
This is why anyone who suspects alpha-gal syndrome should talk with a healthcare provider rather than trying to manage it alone.
Delaware Residents Who Should Pay Extra Attention
Anyone can be bitten by a tick, but some Delaware residents and visitors may have higher exposure because of their activities.
That includes:
- Hunters
- Hikers
- Campers
- Gardeners
- Dog owners
- People who work outdoors
- Children who play near grassy or wooded areas
- Residents living near woods, brush, fields, or wildlife corridors
CDC specifically notes that hunters may be at heightened risk because they spend more time in thick grass, wooded areas, and close to the ground.
How Delaware Residents Can Reduce Their Risk
The best way to prevent alpha-gal syndrome is to prevent tick bites. DNREC and DPH recommend simple steps such as wearing long pants and long sleeves in wooded or grassy areas, avoiding tall grass and leaf litter, using EPA-registered insect repellent, checking yourself, children, and pets for ticks, and keeping yards maintained by mowing regularly and removing leaf piles.
Practical steps include:
- Wear light-colored clothing so ticks are easier to see.
- Tuck pants into socks when walking through tick habitat.
- Use EPA-registered repellent as directed.
- Walk in the center of trails.
- Check armpits, groin, scalp, behind the knees, waistline, and around socks after being outdoors.
- Shower soon after coming inside.
- Use year-round tick prevention for pets that spend time outdoors.
- Remove attached ticks promptly with fine-tipped tweezers.
Delaware officials also encourage residents to save the tick in a sealed bag or take a photo before disposing of it, because knowing the tick species can help determine possible disease risk.
When to Talk to a Healthcare Provider
Talk to a healthcare provider if you notice allergic symptoms after eating red meat, dairy, gelatin, or other mammal-derived products, especially if you have had recent tick exposure. Seek emergency care immediately for symptoms such as trouble breathing, swelling of the lips or throat, fainting, or signs of anaphylaxis. CDC says severe allergic reactions can be life-threatening. A provider may review your symptoms, exposure history, and order a blood test that checks for antibodies related to alpha-gal. CDC lists antibody testing as part of how healthcare providers diagnose AGS.
The Bottom Line
Alpha-gal syndrome is becoming a bigger part of Delaware’s tick conversation.
More than 200 cases have been reported to Delaware DPH since AGS became reportable in 2024, and state officials connect that increase partly to increased testing.
For Delaware residents, the takeaway is simple: tick bites can lead to more than Lyme disease.
Alpha-gal syndrome can turn common foods like beef, pork, lamb, venison, dairy, or gelatin into possible allergy triggers. It can be confusing because symptoms may appear hours after eating. And for some people, reactions can be serious.
The best protection starts before the bite happens.
Use repellent. Check for ticks. Protect your pets. Take tick prevention seriously year-round. And if you suspect alpha-gal syndrome, talk to a healthcare provider.
Sources: https://news.delaware.gov/2026/04/27/dnrec-dph-call-for-heightened-tick-awareness-in-delaware/
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