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When testing for occult blood using hemoccult the presence of blood is indicated by adiscolortion around the perimeteer of a smear?
Wiki User
∙ 13y ago
After the hem-occult card is prepared, and the reagent is dropped on to the specimen, if blood is present there will be a color change resembling that of the positive control. The color change isn't necessarily limited to the perimeter of the drop.
Wiki User
∙ 13y ago
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