|
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
|
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.
Operational Medicine 2001
Health Care in Military Settings
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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