When performing a Hemoccult test, which color is a positive indicator of blood?

Name: When performing a Hemoccult test, which color is a positive indicator of blood?
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The Hemoccult test, which is used to detect hidden blood in stool, indicates a positive result when the test area turns blue. This color change occurs due to the peroxidase-like activity of hemoglobin in blood, which catalyzes the oxidation of the guaiac by hydrogen peroxide, resulting in a blue color.

When Performing a Hemoccult Test, Which Color Is a Positive