Flashcards in Flashcards Deck (6)
What substances are most commonly associated with anaphylactoid reactions? Are these mediated by IgE?
Previously sensitized T cells interact with an antigen causing an inflammatory reaction that peaks in 24-72 hours. What type of hypersensitivity is this?
Type IV cell mediated.
What type of hypersensitive is seen in antibody-antigen mediated reactions?
Type III as in RA, some drug reactions.
What is the most likely diagnosis in a child with the following scenario: he was just started on PCN, has never had it before, he develops the following after 8 days:
Skin rash with redness, itching, urticaria, angioedema
Joint pain of the knees and ankles
Lymph node swelling
Serum sickness which is a type III hypersensitivity reaction.
In infants with atopic dermatitis, what is the typical skin distribution of lesions?