Serum Th2 cytokine determinations. Serum levels of (A) interleukin-5 in wild-type BALB/c and eosinophil lineage–ablated ΔdblGATA mice, (B) interleukin-5 in wild-type C57BL/6 and eosinophil lineage–ablated TgPHIL mice, (C) interleukin-4 in wild-type BALB/c and eosinophil lineage–ablated ΔdblGATA mice, and (D) interleukin-4 in wild-type C57BL/6 and eosinophil lineage–ablated TgPHIL mice at time points indicated. Values are average ± SEM; n = 5 mice per group (uninfected); n = 12 to 13 mice per group (infected); *P < .01 versus uninfected mice.