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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Should I Repeat The PPD Test Once More ?

My 4 yrs old daughter is PPD positive..while she was negative when she was 3 yrs old...what to do..is it false ..should I repeat the test once more
posted on Wed, 27 Jan 2010
Twitter Wed, 27 Jan 2010 Answered on
Twitter Wed, 27 Jan 2010 Last reviewed on
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  Anonymous's Response
's  Response

Hi.. Positive PPD test or Montoux test means presence of antibodies against Mycobacterium.. This can happen when there is infection - either tuberculosis or non tubercular Mycobacterial infection or due to BCG vaccination.. If the test was not read correctly, there are no other posibilities.. If she has not been vaccinated with BCG vaccine at birth, then there is no harm in repeating the test, if you are not convinced..
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Should I Repeat The PPD Test Once More ?

Hi.. Positive PPD test or Montoux test means presence of antibodies against Mycobacterium.. This can happen when there is infection - either tuberculosis or non tubercular Mycobacterial infection or due to BCG vaccination.. If the test was not read correctly, there are no other posibilities.. If she has not been vaccinated with BCG vaccine at birth, then there is no harm in repeating the test, if you are not convinced..