Concept
Version 5
Created by Boundless
Type IV (Delayed Cell-Mediated) Reactions
![Mantoux test](../../../../../../../../../figures.boundless-cdn.com/13386/full/mantoux-test.jpeg)
Mantoux test
The reaction is read by measuring the diameter of induration (palpable raised, hardened area) across the forearm (perpendicular to the long axis) in millimeters. If there is no induration, the result should be recorded as "0 mm". Erythema (redness) should not be measured. If a person has had a history of a positive tuberculin skin test, or had a recent tuberculin skin test (within one year), another skin test should be used.
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