Eosinophilia Eosinophilia is defined as a peripheral blood eosinophil count > 500/μL usually due to an allergic reaction or a parasitic infection or sometimes drug reaction. SX - ask about recent travel (suggesting possible parasite exposure), allergies, medication use PE - Rash (allergic, dermatologic, or vasculitic disorders), abnormal lung findings (asthma, lung infections, or syndromes of pulmonary infiltration with eosinophilia), and generalized lymphadenopathy or splenomegaly (myeloproliferative disorders or cancer).

odr symptoms please elaborate