Azo Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Azo and links to relevant pages within the course.
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| False Positive Urobilinogen Results A false positive urobilinogen reaction may occur with the dipstick method when substances known to react with Ehrlich's reagent such as sulfonamides and p-aminosalicylic acid are present in the urine. Drugs that contain Azo dyes, such as Azo Gantrisin®, have a gold color that masks the reaction, causing a false positive reaction. Atypical color reactions may be obtained in the presence of high concentrations of p-aminobenzoic acid. The dipstick urobilinogen test cannot detect porphobilinogen in a urine specimen. Porphobilinogen is a molecule formed during the synthesis of the heme portion of hemoglobin. | View Page |
| Which of the following substances cause a false-positive reaction on the urobilinogen portion of the test strip? (Choose ALL of the correct answers) | View Page |
| Which of the following cause false negative reactions when testing for urobilinogen with the reagent strips? (Choose ALL of the correct answers) | View Page |