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Sarkari MCQs Government Exam Question Bank
Question no. 60857

Which of the following is not considered a characteristic feature of anaphylaxis ?

Select your answer for: Which of the following is not considered a characteristic feature of anaphylaxis ?
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Answer: A. Delayed reaction

Explanation

Anaphylaxis is a type I hypersensitivity reaction characterized by an immediate response. Symptoms typically manifest within minutes of allergen exposure due to rapid mast cell degranulation. Delayed reaction features do not characterize classical IgE-mediated acute anaphylactic episodes. Anaphylaxis involves sudden multi-organ involvement including cardiovascular and respiratory collapse. Preformed mediators like histamine trigger immediate vasodilation, edema, and bronchospasm. Epinephrine acts as the primary life-saving pharmacological intervention reversing acute symptoms.

Patients with severe food or insect venom allergies carry autoinjectable epinephrine for emergencies. Immediate recognition and treatment prevent fatal outcomes associated with sudden anaphylaxis. Medical alert identification helps healthcare providers anticipate allergic emergencies quickly. Option A is correct because anaphylaxis is an immediate reaction, making delayed reactions incorrect. Option B describes the rapid onset typical of acute anaphylactic hypersensitivity events. Option C describes passive transfer features which can occur via sensitized serum administration.

Subject
Medical
Category
Medical
Topic
—
Difficulty
medium

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