In recent years, dental practice has increasingly encountered systemic medical conditions that were previously considered beyond the scope of dentistry. One such condition is alpha-gal syndrome — a rare but potentially life-threatening form of delayed allergic reaction associated with tick bites. Despite a rising number of cases, this disease remains underrecognized within the dental community. Meanwhile, contemporary scientific data indicates that widely used dental materials and medications can trigger severe allergic reactions in patients with this syndrome.
A recent literature review and clinical case published by American researchers highlight the relevance of the issue and point to the need to revise approaches in selecting dental materials, gathering medical history, and fostering interdisciplinary collaboration.
Pathophysiology of Alpha-Gal Syndrome and Its Clinical Features
Alpha-gal syndrome is a delayed hypersensitivity to a specific carbohydrate component — galactose-α-1,3-galactose, which is present in mammalian meat, as well as in a range of medical and pharmaceutical products of animal origin. Unlike classic food allergies, symptoms in this syndrome develop after a significant delay—from three to eight hours after exposure to the allergen, which substantially complicates identifying the cause-and-effect relationship.
According to data from the U.S. Centers for Disease Control and Prevention, between 2010 and 2022, over 110,000 suspected cases of alpha-gal syndrome were reported, with the overwhelming majority occurring in recent years of observation. More than 90% of patients show a reaction to red meat, and approximately half experience progression to anaphylaxis. This statistics indicates a rapid increase in the syndrome’s prevalence and its growing clinical significance.
Disease Geography and Epidemiological Trends
The development of alpha-gal syndrome is most commonly associated with bites from the Amblyomma americanum tick, known as the “lone star tick,” prevalent in the southeastern and south-central regions of the United States. However, recent epidemiological data indicate that the diagnosis is being made increasingly in other states as well as outside the U.S. The disease is identified in patients across various age groups, with the average age at diagnosis being around 48 years, making it particularly relevant for the adult population that actively seeks dental care.
Study of Dental Risks: A View from Clinical Practice
The lead author of the study in question is Professor John K. Brooks, a clinical professor in the Department of Oncology and Diagnostic Sciences at the University of Maryland School of Dentistry in Baltimore. His interest in alpha-gal syndrome began in 2022 and was directly related to a clinical case he encountered at the university dental clinic.
A female patient with confirmed alpha-gal syndrome reported a severe allergic reaction that developed after taking an antibiotic prescribed to treat a dental infection. As it turned out, the medication was contained in a gelatin capsule of animal origin, which likely served as the triggering factor for the reaction. The lack of sufficient information on this topic in dental literature prompted the researcher to undertake an interdisciplinary analysis and systematic review of available data.
Sensitization Mechanisms and Re-exposure
Through their analysis, Professor Brooks and his colleagues concluded that tick saliva contains a complex carbohydrate capable of “reprogramming” the human immune system. Following a bite, sensitization occurs, where subsequent exposure to structurally similar compounds found in food products, medications, and dental materials can trigger a pronounced hypersensitivity reaction. Clinical manifestations range from skin itching and rashes to respiratory distress and anaphylactic shock, posing a direct threat to the patient’s life.
Potentially Hazardous Dental Materials
As part of the study, a detailed analysis of a wide range of dental products was conducted. The authors examined material compositions, safety data sheets, and verified drug formulations in pharmaceutical databases. The results showed that a significant number of dental agents may contain components capable of triggering a reaction in alpha-gal syndrome.
Such products include hemostatic solutions, sutures, toothpaste, saliva substitutes, fluoride gels, soft and hard tissue grafting materials, prophylactic pastes, and oral rinses. Many of them contain gelatin, collagen, glycerin, and other animal-derived compounds that, upon re-exposure, can cause severe allergic reactions.
Clinical Cases and Emergencies
Particular concern is raised by the five documented cases of allergic reactions directly associated with dental interventions identified by the authors. In four of these cases, the reaction was due to the use of hemostatic agents, and in one — to the use of a gelatin capsule. In all described situations, patients required emergency medical assistance, underscoring the high level of risk when clinicians are insufficiently informed.
Importance of Interdisciplinary Approach and Prevention
Based on the obtained data, Professor Brooks emphasizes that the increasing number of alpha-gal syndrome cases makes dentists’ awareness a critically important factor for patient safety. Medical history collection should include inquiries about tick bites and unusual allergic reactions, while the selection of dental materials must be accompanied by careful scrutiny of their composition.
If a patient has an established diagnosis, the treating dentist must collaborate with an allergist or physician to clarify the list of triggering substances and permissible management strategies. Furthermore, the dental team must be prepared to provide immediate assistance in the event of an acute allergic reaction in the patient’s chair.
Conclusion
Alpha-gal syndrome serves as a clear example of how systemic immunological disorders can directly impact the safety of dental treatment. The publication of a literature review and clinical case titled “Alpha-gal syndrome: Potential risk of hypersensitivity following the use of dental products,” released in the July 2025 issue of the Journal of the American Dental Association, highlights the need to revise established clinical algorithms.
Повышение информированности, осознанный выбор материалов и междисциплинарное взаимодействие способны существенно снизить риск жизнеугрожающих осложнений. В условиях роста распространенности синдрома альфа-гала стоматологическая практика становится важным звеном в системе раннего выявления и профилактики тяжелых аллергических реакций, выходя за рамки традиционного представления о роли стоматолога в здравоохранении.
