CDC Report Indicates Broader Alpha-Gal Syndrome Risk

The Centers for Disease Control and Prevention (CDC) recently released new estimates suggesting that more individuals in the United States may be at risk for alpha-gal syndrome, a condition that causes an allergic reaction to red meat following a tick bite.

Approximately 450,000 Americans may have developed alpha-gal syndrome, according to a recent CDC report. This figure represents a substantial increase from previous estimates.

Alpha-gal syndrome results from a bite from certain ticks, including the Lone Star tick in the United States. The bite transmits a sugar molecule, alpha-gal, into the person's body. Some individuals then develop an allergy to alpha-gal, which is present in mammalian meat like beef, pork, and lamb.

Symptoms of alpha-gal syndrome commonly include hives, digestive upset, shortness of breath, and a drop in blood pressure. These symptoms often appear hours after consuming red meat.

Medical professionals have diagnosed over 110,000 cases of alpha-gal syndrome since 2010. However, most individuals who have the condition remain undiagnosed. A significant factor contributing to underdiagnosis is the low level of public awareness about the syndrome.

Dr. Ann Carpenter, who authored the CDC reports, stated, "Alpha-gal syndrome is an important emerging public health concern, with impacts for people’s health, livelihoods, and well-being." She added, "It’s critical for clinicians to be aware of AGS so they can properly diagnose and manage patients, and to educate patients on tick bite prevention to protect people from this allergy."

Two studies published in the CDC’s Morbidity and Mortality Weekly Report detailed the findings. One study analyzed survey responses from over 1,500 healthcare providers across the nation between 2022 and 2023. Researchers noted that nearly half of these providers lacked knowledge regarding alpha-gal syndrome's diagnosis and management. One-third of surveyed providers stated they had never heard of the syndrome.

Physicians should consider alpha-gal syndrome when evaluating patients presenting with allergic reactions, particularly those with a history of tick exposure. Early diagnosis allows for dietary adjustments and mitigation of severe allergic episodes. Individuals can reduce their risk of developing alpha-gal syndrome by taking precautions against tick bites, such as wearing protective clothing and using tick repellents when in wooded or grassy areas.