Figure 1.

(A) Serum IgE levels in IgE-deficient (KO) and wild-type (WT) mice after treatment with NS or Af extract. Bars represent mean values for five mice within each treatment group ± SEM. (B) Heterologous PCA determination of anti-Af IgE. Titers represent the reciprocal of the greatest serum dilution giving a positive cutaneous reaction. Mean titers ± SEM are presented for the groups described in A. Open squares represent data groups in which no sera conferred a detectable reaction (titer <10).