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PPD

The PPD is a skin test that screens for the presence of antibodies against tuberculosis proteins. 

Tests are normally negative. A positive test indicates current active infection, previous infection, or enough previous exposure (without clinical infection) to develop antibodies against tuberculosis.

The test is read 48-72 hours after intradermal injection. The diameter of induration (the "zone") is measured.

A variety of factors can lead to false positives or false negatives.

 

TB Skin Testing Video
Video demonstrating how to perform and read TB skin tests. Available as a download and on DVD
www.brooksidepress.org

Normal Values*

  Zone diameter
Negative < 5 mm
Intermediate 5-10 mm
Positive >10 mm

*These are general values taken from a variety of sources. The actual normal values may vary from lab to lab and from one type of testing protocol to another.


 

 

Approved for public release; Distribution is unlimited.
The listing of any non-Federal product in this CD is not an endorsement of the product itself, but simply an acknowledgement of the source. 

Bureau of Medicine and Surgery
Department of the Navy
2300 E Street NW
Washington, D.C
20372-5300

Operational Medicine
 Health Care in Military Settings
CAPT Michael John Hughey, MC, USNR
NAVMED P-5139
  January 1, 2001

United States Special Operations Command
7701 Tampa Point Blvd.
MacDill AFB, Florida
33621-5323

*This web version is provided by The Brookside Associates Medical Education Division.  It contains original contents from the official US Navy NAVMED P-5139, but has been reformatted for web access and includes advertising and links that were not present in the original version. This web version has not been approved by the Department of the Navy or the Department of Defense. The presence of any advertising on these pages does not constitute an endorsement of that product or service by either the US Department of Defense or the Brookside Associates. The Brookside Associates is a private organization, not affiliated with the United States Department of Defense.

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Operational Medicine 2001
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