Total and OVA-specific IgE levels in Wt and IL-8r^–/– mice. Total (a) and OVA-specific (b) IgE were measured in OVA/OVA-7d and OVA/PBS-7d Wt and IL-8r^–/– mice. Data are expressed as mean ± SEM from the four groups of mice (minimum of five mice per group) from a representative experiment.