Which of the Following is Not a Possible Symptom of Type

Question

Which of the following is not a possible symptom of Type 1 hypersensitivity?
A)Rhinitis
B)Rashes
C)Sneezing
D)Diarrhea
E)Contact dermatitis

Accepted Answer

Type 1 hypersensitivity reactions are immediate allergic reactions mediated by IgE antibodies. Symptoms can include rhinitis, rashes, sneezing, and diarrhea, which are caused by the release of histamine and other mediators from mast cells. Contact dermatitis, however, is typically associated with Type IV hypersensitivity, which is a delayed-type reaction mediated by T cells, not IgE antibodies.