Why Are Type IV Hypersensitivities Called Delayed Hypersensitivity Reactions

question 10

Multiple Choice

Why are type IV hypersensitivities called delayed hypersensitivity reactions?

• A) Drugs to counteract type IV reactions are large and slow to be absorbed by the affected cells causing the patient to tolerate a lengthy symptomatic phase before recovery is complete.
• B) Although type IV reactions can cause skin lesions, watery eyes, and a runny nose, treatment for those symptoms needs to be delayed due to the rapid drop in blood pressure which soon follows and needs to be dealt with first.
• C) Type IV reactions affect nerve cells and cause nerve impulses to slow resulting in visibly slower movements from the patient.
• D) Type IV reactions manifest slowly over 12- 72 hours after the stimulating antigen is encountered.
• E) Type IV reactions only occur in underdeveloped countries and medical attention often needs to be delayed until the patient can be brought to a hospital.

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