S2459 Bad News Gummy Bears: A Case of Gastrointestinal-Isolated Alpha-Gal Allergy
Bibliographic record
Abstract
Introduction: Galactose-α-1,3-galactose (alpha-gal) allergy is an IgE-mediated reaction to mammalian meat and dairy, with symptoms typically developing 3 to 6 hours after ingestion. Alpha-gal allergy with isolated gastrointestinal (GI) symptoms (abdominal pain, diarrhea, vomiting) without urticaria or anaphylaxis has been described. Case Description/Methods: A 49-year-old male presented to GI clinic with years of episodic cramping abdominal pain and 4-6 diarrheal stools daily. Colonoscopy, EGD, CT abdomen, and hydrogen breath testing were unrevealing. We diagnosed irritable bowel syndrome. Rifaximin briefly relieved symptoms. He did not tolerate tricyclic antidepressants. Serum alpha-gal IgE level was found to be elevated at 0.27 kU/L (reference range, < 0.1 kU/L) after the patient reported past tick bites. The patient stopped eating mammalian meat and symptoms improved but continued. He further excluded gelatin in the form of gummy bears, dairy, and carrageenan, which led to near resolution of symptoms. At a visit 2 years following allergy diagnosis, he reported one formed stool daily and no chronic abdominal pain. Self-challenging with foods that have small amounts of alpha gal, like a handful of gummy bears, had resulted in severe abdominal cramping. Discussion: The diagnosis of GI alpha-gal syndrome can be challenging because of delayed onset of symptoms after eating mammalian products, nonspecific GI complaints on presentation, and overlap with preexisting GI diseases. While sensitization is believed to be caused by a bite from the Lone Star tick, not all patients report a history of tick bites. Further studies are needed to better characterize GI alpha gal, but 2 cohort studies found that ∼75% of patients improved on a diet free of mammalian products. These diets are somewhat ill-defined in how strict they are, particularly whether they are just free of mammalian meat or all products containing alpha-gal. A stepwise approach is recommended, starting with mammalian meat, then dairy, and then gelatin, gelatin capsules, and mammalian food additives if symptoms persist. Our patient experienced improvement in symptoms with elimination of mammalian meat from his diet, but no resolution until he eliminated all alpha-gal, particularly gelatin and carrageenan. This case highlights the importance of a thorough history, increased awareness of foods containing alpha-gal, and the need for future prospective studies for improving early recognition and treatment of GI alpha gal (Figure).Figure 1.: Recommended order of alpha-gal elimination from the diet: (i) mammalian meat with or without dairy; (ii) dairy; and (iii) gelatin, gelatin capsules, and mammalian food additives. Figure used with permission from McGill SK, Richards RD Jr, Commins SP. Suddenly Steakless: A Gastroenterologist's Guide to Managing Alpha-Gal Allergy. Am J Gastroenterol. 2022;117(6):822-826.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.007 | 0.004 |
| Insufficient payload (model declined to judge) | 0.006 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".