Question 1

what can cause a positive ppd test reading?

Accepted Answer

Mycobacteria: Tuberculosis and other members of the same family, some less severe.   There are also "positives" that aren't true in duration - like an allergic reaction at the site within minutes of ppd placement.

Question 2

what should i do if i just got a positive ppd reading?

Accepted Answer

POSITIVE PPD: If it is the first time positive reading and it is more than 15mm positive, you need to have xray chest done, if negative you need prophylactic inh prescribed by your doctor for 9 months.

Question 3

positive ppd reading if red?

Accepted Answer

Ppd reading red?: No redness does not mean it is positive.You feel  the induration in mms to interpret it after 48 to 72 hours.5mm or more is positive in HIV posotive person, in someone with recent exposure to tb, with nodular or fibrotic changes on xray consistant with healed TB and patients with organ transplant and immunocompromised
10mm or more +in recent arrivals from high prevalace ares
nursing homes
15mm + in.

Question 4

what is a ppd test?

Accepted Answer

PPD: The mantoux test (also known as the mantoux screening test, tuberculin sensitivity test, pirquet test, or PPD test for purified protein derivative) is a diagnostic tool for tuberculosis.

Question 5

what's a two-step ppd test?

Accepted Answer

As it says: In some people with previous exposure to tb, especially remotely, an imitial TB skin test (tst) will be negative but a repeat, say 2 weeks later, can be positive.  It is sort of like waking up the immune recognition of the bug.  But, it is not at all clear that those who are only positive on the two-step tst are at risk for reactivation later as those with a 1-step positive tst.

Question 6

what does a negative ppd test look like?

Accepted Answer

See below: A positive PPD is determined by the presence of swelling(induration) around the injection site.  Little or no swelling indicates a negative test.  Reddness is not used to determine a neg or pos test.

Question 7

how long does a reaction to a ppd test take to clear?

Accepted Answer

Depends: It usually only takes a few days but severe reactions can take 1-2 weeks and can even leave a scar if the reaction was a blistering one.

Question 8

i just had a ppd test done and feel little bit unwell?

Accepted Answer

Unlikely from PPD: Never having seen systemic symptoms from placement of a PPD i cannot imagine how this "unwell" sensation might have occurred or if it is related to the ppd.  Perhaps a mild allergic reaction to the material in the ppd.  Hope you feel better soon.

Question 9

are there any dangers from repeating a potive ppd test?

Accepted Answer

Yes: The reaction the next time around can be more prominent leading to significant pain and discomfort and, potentially, a scar.  Once a person has had a positive PPD skin test, they should not have the test repeated.

Question 10

i just had a ppd test done and ilittle bit unwell afterward?

Accepted Answer

Unusual: But some people may develop malaise because of the thought of the test, or the immune reaction may precipitate some low grade symptoms, or there may be allergic reactions to material in the PPD preparation.

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Doctor answers about:

Ppd test reading

A member asked:

What can cause a positive ppd test reading?

A member asked:

What should i do if i just got a positive ppd reading?

A member asked:

Positive ppd reading if red?

A member asked:

What is a ppd test?

A member asked:

What's a two-step ppd test?

A member asked:

What does a negative ppd test look like?

A member asked:

How long does a reaction to a ppd test take to clear?

A member asked:

I just had a ppd test done and feel little bit unwell?

A member asked:

Are there any dangers from repeating a potive ppd test?

A member asked:

I just had a ppd test done and ilittle bit unwell afterward?

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