Type IV – Tuberculin & Other Skin Tests
Uperformed
by injecting of test antigens intradermally
Umost common
allergins injected include:
ePPD - purified protein derivative from M. tuberculosis
is used
eCandida
albicans
Utests read
between 48 - 72 hours after injection
Udevelopment
of a red, slightly swollen firm lesion indicates a positive reaction
