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Section: Urinalysis and Body Fluids6.5 Urinalysis and Body Fluids Problem Solving
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SITUATION: A urine specimen has a specific gravity of 1.025 and is strongly positive for nitrite. All other dry reagent strip test results are normal, and the microscopic exam was unremarkable, showing no WBCs or bacteria. The urine sample was submitted as part of a preemployment physical exam that also includes drug testing. Which most likely caused these results?
A viral infection of the kidney
A urinary tract infection in an immunosuppressed person
An adulterated urine specimen
Error in reading the nitrite pad caused by poor reflectometer calibration