Atopy is mediated by -: (A) IgE, (B) IgD, (C) IgM, (D) IgA
Answer is A. Atopic individuals can have up to 10 times the normal level of IgE in their blood. Atopy is also called IgE mediated reactions Reff: Ananthanarayan &Parkerss textbook of microbiology 9th edition pg:98