Tick-Borne Meat Allergy Raises Blood Transfusion Reaction Risk

FRIDAY, Sept. 18, 2026 (HealthDay News) — A meat allergy caused by tick bites could make it tougher for patients to safely receive blood transfusions, a new study says.

Alpha-gal syndrome (AGS) might cause people with “universal” type O blood to suffer an allergic reaction after receiving transfusions from type B or type AB donors, researchers recently reported in JAMA Internal Medicine.

Such allergic reactions occur nearly four times more often in U.S. areas where alpha-gal syndrome is most common, researchers found.

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Allergy Information

What Are Seasonal Allergies?

More than 67 million americans suffer from allergy symptoms, including hay fever. But, what is an allergy? What is an allergic reaction? What are common allergy symptoms? What allergy treatments are available?

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What is Pollen?

Pollen is one of the most common allergens in the United States. Pollen is an airborne allergen, which is picked up and carried by the wind. Various trees, grasses and weeds create pollen, which can cause hay fever, irritate your eyes and skin.

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