Related Experiment Video
Updated: Jul 19, 2026
08:47
Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
Published on: March 3, 2023
Evaluation of systemic allergy in a jet aviator
Dan Carter1, Alon Grossman, Russell Pokroy
1Israel Aeromedical Center, Israel Air Force, Tel Hashomer, Israel. carterd@zahav.net.il
Allergy and Asthma Proceedings
|October 27, 2006
Summary
Cholinergic urticaria, a condition triggered by increased body temperature, can rarely cause severe symptoms. This case study shows a pilot successfully managed exercise-induced anaphylaxis and cholinergic urticaria, allowing a return to flight duty.
Area of Science:
- Allergy and Immunology
- Exercise Physiology
Background:
- Cholinergic urticaria is linked to core body temperature rise, causing skin issues and sometimes respiratory/cardiovascular compromise.
- Exercise-induced anaphylaxis (EIA) can lead to syncope and cardiovascular compromise, occasionally associated with food triggers.
Observation:
- A 41-year-old jet pilot experienced 3 months of pruritus and urticaria during treadmill exercise.
- The pilot reported two episodes of syncope after exercise, despite mild pruritus and urticaria.
Findings:
- A tailored challenge test involving passive warming and exercise in a hot environment (40°C, 40% humidity) was designed.
- The pilot successfully completed the challenge test without adverse events, indicating effective management.
Implications:
- Successful management of cholinergic urticaria and EIA allows individuals to return to demanding occupations.
- This case highlights the importance of individualized challenge testing for diagnosing and managing exercise-induced hypersensitivity reactions.
Related Concept Videos
02:06Allergic Reactions
Overview
01:30Allergic Reactions: Anaphylaxis
Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
01:27Allergic Drug Reactions
Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...
01:30Drug Toxicity: Allergic Reactions
Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
01:13Asthma III: Clinical Manifestations
Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
01:19Hypersensitivity Reactions: Immune-Complex Reactions
Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...