QuestionSBA
QuestionChoice
This is incorrect. Type 1 hypersensitivity reactions occur much more rapidly after exposure. They are IgE-mediated. Examples include atopy and anaphylaxis.
10027585
e
Type 1 Hypersensitivity
QuestionChoice
This is incorrect. There is no such thing as a type 5 hypersensitivity reaction.
10027584
d
Type 5 Hypersensitivity
QuestionChoice
This is incorrect. Type 2 reactions are IgG or IgM antibody-mediated and usually onset time is hours to days. Examples include haemolytic disease of the newborn and autoimmune haemolytic anaemia.
10027582
b
Type 2 Hypersensitivity
QuestionChoice
This is incorrect. This is an antigen-antibody immune complex-mediated reaction that usually arises between hours and weeks after exposure. Examples include serum sickness and post-streptococcal glomerulonephritis.
10027583
c
Type 3 Hypersensitivity
QuestionChoice
This is correct. Type 4 hypersensitivity is known as delayed hypersensitivity. The reaction occurs 24 to 72 hours after exposure and is T-cell mediated. Stevens-Johnson syndrome is a type IV reaction that involves the skin and mucus membranes.
10027581
a
Type 4 Hypersensitivity
Concept
Chapter
2693
4091
Hypersensitivity reactions
Topic
158
Immunology
17914
A 60 year old female attends A&E as she notices a new blistering rash across her chest, as well as multiple painful mouth ulcers. 3 days ago she started a course of amoxicillin that was prescribed by her GP for a community-acquired pneumonia. She is diagnosed with Stevens-Johnson Syndrome.

Which of the following hypersensitivity reactions is this an example of?
a