Mice (8/treatment group) were administered OVA protein alone, OVA + mTi, or OVA + Alum, seven days later challenged with OVA alone, and 21 days after final inoculation serum was collected from each mouse and individually assayed for total and Ag-specific Igs. Both total serum IgE and IgG1 were markedly elevated, while slight increases in total serum IgG2a (Fig 1A) were observed. Similarly, OVA-specific IgE, IgG1, and IgG2a (Fig1B) were elevated. Data are expressed as the mean and s.e. of 8 individual mice within each treatment group and all experiments were repeated twice with similar results (**p<0.01).