Abstract: The present invention relates to novel peptide epitopes derived from the CH3 domain of IgE which are recognized by high affinity antibodies that specifically bind IgE. These novel peptides may be used for both active immunization of a subject by administering these peptides to generate high affinity antibodies in a subject, as well as for generating high affinity anti-IgE antibodies in non-human hosts that specifically bind to these regions of IgE for passive immunization of a subject.