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Test Code UREOS Eosinophil Smear, Random, Urine, LAB2135


A Cytospin Slide is Made from the Urine Specimen/Stained with Wright’s Stain/Examined Microscopically for the Presence of Eosinophils

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

5 mL (minimum) from a first-morning, random urine collection. Forward promptly.

The cytospin slide should be made within 2 hours of collection to help assure the integrity of WBC.

Reference Values

0 (zero)

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

Eosinophils may be noted in patients with tubulointerstitial disease associated with hypersensitivity to drugs such as penicillin and its analogs.  Eosinophiluria is also seen in other acute disorders of the genitourinary tract.  Eosinophiluria is reported in up to 100% of patients with acute interstitial nephritis.  This finding is useful in distinguishing this syndrome from acute tubular necrosis, in which eosinophiluria is absent.