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Allergic Reactions

Allergic Reactions

Hypersensitivities

Hypersensitivities

Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...

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Conditioned Taste Aversion

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Desensitization and Tachyphylaxis

Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.

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Related Experiment Video

Updated: Sep 13, 2025

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Published on: September 14, 2018

Food-Dependent Exercise-Induced Anaphylaxis on a Nontraditional Timeline.

Ruchi R Patel¹, Ruchi Biswas¹, Jasmit Walia-Kals²

¹Internal Medicine, New Jersey Medical School, Rutgers University, Newark, USA.

|July 28, 2025

Summary

This summary is machine-generated.

Food-dependent exercise-induced anaphylaxis (FDEIA) is a rare allergic reaction. This case highlights FDEIA occurring after, not before, food ingestion, emphasizing the need for broader diagnostic consideration.

Keywords:

allergy anaphylaxis case food allergy pediatric

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Last Updated: Sep 13, 2025

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Published on: September 14, 2018

Measuring Local Anaphylaxis in Mice

Measuring Local Anaphylaxis in Mice

Published on: October 14, 2014

Basophil Activation Test for Allergy Diagnosis

Basophil Activation Test for Allergy Diagnosis

Published on: May 31, 2021

Area of Science:

Allergy and Immunology
Clinical Medicine

Background:

Food-dependent exercise-induced anaphylaxis (FDEIA) is a rare condition typically triggered by food ingestion followed by exercise.
Exercise acts as a cofactor, lowering the threshold for an allergic reaction to specific food allergens.

Observation:

A 14-year-old male experienced anaphylaxis after consuming a protein drink post-exercise.
Symptoms included angioedema, pruritus, and cough, resolving with standard anaphylaxis treatment.
Diagnostic workup, including skin prick testing, revealed sensitization to environmental aeroallergens, with potential cross-reactivity from drink ingredients.

Findings:

This case presents a reversed sequence of FDEIA, with anaphylaxis occurring after food ingestion and prior exercise.
Standard FDEIA diagnostic criteria were met, despite the atypical temporal sequence.

Implications:

Clinicians should consider FDEIA even when anaphylaxis symptoms manifest after food ingestion and prior exercise.
Recognizing atypical FDEIA presentations is crucial for accurate diagnosis and management, including patient counseling on allergen avoidance and exercise timing.