Figure 1. Eosinophils are recruited to and are sustained in the airways after intranasal challenge with allergens from the fungus, A. alternata.
A. Basic protocol: mice are inoculated intranasally with a filtrate of the fungus, Alternaria alternata (Aa) on days 0, 3 and 6 (50 μg/mouse in 50 μL per inoculation) followed by evaluation at multiple time points thereafter. B. Airway eosinophils recovered from wild-type mice have typical morphology, including a ring-shaped nucleus and red granules when stained with modified Giemsa, original magnification, 40X. C. Airway eosinophils (% of total leukocytes) detected at days indicated after Aa challenge of wild-type (BALB/c) and D. lymphocyte-deficient Rag1−/− mice (BALB/c); n = 3 – 7 mice per point, **p < 0.01, *p < 0.05 vs. % eosinophils at day 3.