which diagnostic test involves the introduction of a purified protein derivative (ppd)?
The size of induration is measured 48â72 hours later. Erythema (redness) should not be measured. The Mantoux test or Mendel-Mantoux test (also known as the Mantoux screening test, tuberculin sensitivity test, Pirquet test, or PPD test for purified protein derivative) is a screening tool for tuberculosis (TB).