
▲ 32 r/alphagal
New CDC Study on AGS IgE antibodies in the U.S. Population
Hi everyone! The CDC just released a very interesting paper (7/2/26) - it is the first large CDC study to examine how common alpha-gal IgE antibodies are in the U.S. population.
Key findings:
- Approximately one in four adults (24%) in the five highest-risk states had detectable alpha-gal IgE antibodies. These states were Arkansas, Kentucky, Missouri, Tennessee, and Virginia.
- Having alpha-gal IgE antibodies does NOT mean a person has alpha-gal syndrome (AGS). Many people are sensitized (positive blood test) but have no clinical symptoms. Diagnosis requires both compatible symptoms AND a positive alpha-gal IgE test.
- Providers should only order alpha-gal IgE testing when patients have symptoms consistent with AGS.
- Positive alpha-gal IgE tests alone may lead to overdiagnosis. Relying only on laboratory results could result in unnecessary dietary restrictions
- Maine showed higher-than-expected seroprevalence (10.6%). The authors note this may reflect evidence that blacklegged ticks (Ixodes scapularis) can also induce alpha-gal sensitization.
- Older adults and men were more likely to be alpha-gal IgE positive.
- Men had about 1.6 times higher odds of seropositivity than women.
- Adults aged 55 years and older had substantially higher seroprevalence than younger adults.
- The study reinforces that AGS is likely underrecognized.
- CDC recommends improving surveillance. Future surveillance should include clinical criteria, not just laboratory results
Read the full article at https://www.cdc.gov/mmwr/volumes/75/wr/mm7525a1.htm?s_cid=OS_mm7525a1_w
u/JenniferPlattDrPH — 3 days ago