1 doctor weighed in:

Can you tell me if a TB skin test came up (borderline) positive, wouldn't it always come up the same?

1 doctor weighed in
Dr. Heidi Fowler
Psychiatry

In brief: No

A person can have a false negative test if they are immuno compromised, have poor nutrition etc.
10 to 15% of people with newly diagnosed lung TB come up with a neg PPD initially. A test that is borderline may be positive later. Once you have a + ppd, you normally don't need to have it repeated.

In brief: No

A person can have a false negative test if they are immuno compromised, have poor nutrition etc.
10 to 15% of people with newly diagnosed lung TB come up with a neg PPD initially. A test that is borderline may be positive later. Once you have a + ppd, you normally don't need to have it repeated.
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