IL5 and Increased total eosinophil count: In a separate study, Andersonet al. showed that IL-5 and IL-33 produced in the lung (but not bone marrow) in a murine model of Alternaria exposure lead to increased numbers of eosinophils and EoPs in bone marrow38, suggesting that IL-33 also plays an important role in allergen-induced eosinophilia.