Question 1

what about allergic reaction from the test (tubersol?

Accepted Answer

None: There is no allergic reaction to the tubersol (tb mantoux) test.
If there is a swelling and redness around the site of the test, it may mean that the test is positive and this has to be confirmed by your doctor who will determine what step needs to be taken next.

Question 2

is it an allergic reaction from the test (tubersol) if you have some swelling?

Accepted Answer

Show your doctor: Swelling, redness, tenderness, heat, and even bruising are the signs of a positive reaction to the tuberculin protein present in tubersol. This is not an allergy but a hypersensitivity reaction. Both involve the immune system activity. In this case the positive reaction indicates previous exposure to tuberculosis either through infection or by vaccination with BCG (bacillus calmette-guerin).

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

is red dye 40 related to ppd?

Accepted Answer

Red Dye #40:  &amp; Pervasive Developmental Disorder ??  Not sure. Red #40 (Allura Red) is the most frequently used dye. There are concerns that it may be linked to  hyperactivity, ADHD &amp; autism spectrum disorders. There is also possibility of hypersensitivity Rxn's. This merits further study.

Question 5

how is the ppd skin test measured?

Accepted Answer

Size of induration: The tuberculosis skin test (PPD) is measured between 48-72 hrs after placement. The area of induration (palpable, raised, hardened area) around the site of injection is measured and this represents the reaction to tuberculin.

Question 6

what does a positive ppd look like photos?

Accepted Answer

See image: A reaction of 15 mm or greater in a generally healthy person with a normal immune system without risk factors is considered a positive reaction.

Question 7

why do nursing homes use double ppd testing?

Accepted Answer

Older immune system: An elderly person's immune system can sometimes not react very strongly or at all to the first PPD test (even if the patient has been infected with tb) and lead to a false negative result.  But the false negative PPD can 'prime' the immune system so that a second test done two weeks later will give a true positive result.

Question 8

is it possible to have tb after a negative ppd test?

Accepted Answer

PPD testing: The answer is yes. A previous exposure to TB (travel to a country where TB is endemic) can result with a negative PPD test before the germs produce disease. Have yourself retested in 8 to 10 weeks if still suspicious or opt for the blood test, quantiferon.

Question 9

how did i test positive for ppd when i had the bcg vac?

Accepted Answer

False positive: Past use of BCG can cause a false-positive reaction to the Tuberculin Skin Test (TST) / PPD Mantoux skin test.

Question 10

can you tell me more about ppd testing for tb exposure?

Accepted Answer

PPD testing: Here is good info from the CDC:  https://www.cdc.gov/tb/publications/factsheets/testing/skintesting.htm

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Doctor answers about:

Tubersol

A member asked:

What about allergic reaction from the test (tubersol?

A member asked:

Is it an allergic reaction from the test (tubersol) if you have some swelling?

A member asked:

Positive ppd reading if red?

A member asked:

Is red dye 40 related to ppd?

A member asked:

How is the ppd skin test measured?

A member asked:

What does a positive ppd look like photos?

A member asked:

Why do nursing homes use double ppd testing?

A member asked:

Is it possible to have tb after a negative ppd test?

A member asked:

How did i test positive for ppd when i had the bcg vac?

A member asked:

Can you tell me more about ppd testing for tb exposure?

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