Detection of Urinary Bilirubin

Question

A urine specimen to be tested for bilirubin arrives in the laboratory after sitting on the counter at the nurses station for 2 hours. Which of the following statements describes the Ictotest® reaction that could potentially occur in this situation?

Please select the single best answer

false positive due to oxidation of bilirubin to biliverdin
false positive due to increased amounts of urobilinogen
false negative due to light destruction of bilirubin
false negative due to bacterial contamination

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