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SIM test is a test performed to test for sulfur reduction, Indole production and motility. Black color formed= positive for sulfur reduction Red color after adding Kovacs reag â¦ ent= positive for Indole production Microorgaism growth all over the tube= motile.
What do my QuantiFERON TB Blood Test results mean? A positive or indeterminate result typically means that you will need to get a chest x-ray to confirm that you do not have active tuberculosis. A negative result typically means that you will not need further imaging.