Purified nuocytes were cultured for 2 - 5 days in RPMI supplemented with 10 ng/ml IL-33 and 10 ng/ml IL-7. Cells were washed and injected intravenously in PBS via the tail vein at 0.5 × 106 cells/mouse. Adoptive transfer was performed four hours after infection with N. brasiliensis, or 12 hours before the first cytokine administration of IL-25 i.p.