A, IL-13Rα2 gene expression in the smooth muscle cells at day 9 after inoculation with N. brasiliensis (Nb) in the small intestine of WT, IL-4−/−, IL-13−/−, and STAT6−/− (n ≥ 3) mice using LCM followed by real-time PCR. All data are expressed relative to WT uninfected muscle. *, p < 0.01 vs infected WT control. B, IL-13Rα2 expression in mice treated for 6 days with IL-13 (10 μg/mouse) and studied on day 7 or mice studied 9 days after inoculation with N. brasiliensis. *, p < 0.05 and **, p < 0.01 vs WT control.