What Does An Atom REALLY Look Like? - Duration: 8:44. The Science Asylum 600,649 views
A NEGATIVE result from a Hemoccult II test means that there was no evidence of occult (hidden) blood detected in your stool specimen. However, this test is not a complete cancer detection examination; it only detects blood in the stool.
A positive initial drug screening means that the person tested has a substance in his or her body that falls into one of the drug classes and is above the established cutoff level. If secondary testing confirms a positive result, it means that the person has indeed taken this drug.