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Antibody release into BAL fluid following airway allergen challenge of HDM-sensitized, allergic sheep. Antibody reactivity to HDM was assessed in BAL fluid collected prior to the first airway challenge (0 h) and 48 h following two separate airway challenges with HDM allergen (n = 4 allergic animals). ELISA data is presented as mean absorbance values ± s.d. * indicates a significant difference (p < 0.05) compared to 0 h BAL samples.
