See below: The most common cause for eosinophilia is allergy and parasitic infection. Further testing is indicated in the following circumstances: Unexplained eosinophil count(EC) greater than 1500 eosinophils/uL on 2 separate occasions; Persistent EC>500/uL with signs or symptoms of illness;Patients with EC of 500-1500 and who traveled to area where parasites are common. Not in above catagories>just watch
Answered 1/21/2018
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