Minnesota ticks linked to alpha-gal

Minnesota’s warning on alpha-gal syndrome is narrower than the headline and broader than many people realize. The Minnesota Department of Health says alpha-gal syndrome, or AGS, is an allergic condition that can occur after a tick bite, and the state says the lone star tick is “rarely found in Minnesota.” The Centers for Disease Control and Prevention says the condition is primarily associated in the United States with lone star ticks, but it has also reported a small number of cases after blacklegged tick bites. That matters in Minnesota, where blacklegged ticks are common and lone star ticks are not. ### If the lone star tick is rare in Minnesota, why are people talking about this now? The Minnesota Department of Health updated its alpha-gal page on March 30, 2026, and says it is monitoring lone star tick distribution in the state while assessing how many Minnesotans are affected by AGS. The agency’s page says the condition can happen after a tick bite and points residents to a county map for lone star tick reports and to a tick-submission program for identification. (health.mn.gov) The Minnesota Star Tribune reported on May 17 that cases in northern Minnesota have drawn attention because people developed red-meat allergy symptoms in places where the traditional culprit, the lone star tick, is not established. The paper’s report aligns with a broader shift in public-health messaging: AGS is still tied mainly to lone star ticks, but researchers are examining whether other ticks can trigger it in some cases. (health.mn.gov) ### What exactly is alpha-gal syndrome? The CDC says AGS is a serious, potentially life-threatening allergy to alpha-gal, a sugar molecule found in most mammals but not in people. After a sensitizing tick bite, people with AGS can react when they eat red meat or are exposed to other products containing alpha-gal. Minnesota health officials say symptoms appear after consuming products that contain alpha-gal, which is why AGS is often called red-meat allergy. (startribune.com) The CDC says patients may need to avoid beef, pork, lamb and, in some cases, dairy products, medicines and other mammal-derived products, depending on what triggers their reactions. ### Which Minnesota tick is in the frame if not the lone star tick? (cdc.gov) The CDC says the lone star tick is “most often associated” with AGS in the United States. But the agency also says a few U.S. cases have been reported after bites from blacklegged ticks and western blacklegged ticks. Two CDC case reports published in *Emerging Infectious Diseases* linked AGS onset to Ixodes ticks outside the lone star tick’s usual range. (health.mn.gov) One report described a Washington resident after local western blacklegged tick bites. Another described AGS after an Ixodes scapularis, or blacklegged tick, bite in Maine and said statewide surveillance there found additional suspected cases. (cdc.gov) In Minnesota, the blacklegged tick is the species residents already know as the deer tick because it spreads Lyme disease and other infections. That does not mean every blacklegged tick bite causes AGS, and the CDC says not every person bitten even by a lone star, blacklegged or western blacklegged tick will develop the condition. ### How big is the problem in the United States? (wwwnc.cdc.gov) The CDC said in January 2026 that more than 110,000 suspected AGS cases were identified between 2010 and 2022 and that as many as 450,000 people in the United States may be affected. The agency says the true number is unknown because AGS is not nationally notifiable. A CDC analysis published in 2023 found 90,018 people had positive alpha-gal test results during 2017-2022 in data drawn from the commercial laboratory that handled nearly all U.S. testing before 2022. (cdc.gov) That report said suspected cases were concentrated in counties with established lone star tick populations but were also identified outside that range. ### What should Minnesota readers actually do with this information? The Minnesota Department of Health says the best way to reduce the risk of AGS is to prevent tick bites. The state asks residents who think they found a lone star tick to mail it in for expert identification through its tick-monitoring program. The CDC says people who develop allergic symptoms after eating red meat or other mammal-derived products, especially after tick exposure, should talk with a healthcare provider. (cdc.gov) Minnesota’s health department keeps its AGS guidance, symptoms list and tick-monitoring information on its public disease page, which was last updated March 30, 2026. (cdc.gov) (health.mn.gov)