Interpreting the PPD | Infectious diseases | NCLEX-RN | Khan Academy

Find out how the cutoff for a "positive PPD" depends on clinical clues. Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video. Created by Stanford School of Medicine.
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[@dhruvmini01]

I wish this diagram was shown online. Immensely useful.

[@samiullah-413]

BCG & PPD share antigens so one need to consider BCG while interpreting Montoux test

[@skarpengland]

IGRA can confirm

[@HafizahHoshni]

Simply superb!! Makes learning beautiful and easy 9/8/2018 ❤

[@wandering_gnome2868]

I am confused by your analogy. As I am "low risk" and I have not been sick in many years and have an excellent immune system no colds flu covid nothing for years. I just got a TB skin test and the red mark is very small like maybe 2-3 mm i have zero symptoms so is my test positive or negative? Its only been 24hrs though.

[@kristagno]

Thank you! This helps me a lot!❤️

[@xspitefire101x]

awesome explanation, thank you.

[@Survivingmed]

Was good thank you!