Measurement of Tuberculin Test after 48 & 72 hours Injection at under 25 Years old Students of Rasoul Akram Hospital

Intradermal test of Purified Protein Derivative (PPD is a reliable assessment of primary Mycobacterium tuberculosis infections. The reactions were assessed by measuring, the induration’s diameter after 48 &72 hours. We compared the induration’s size of 48 hours with 72 hours in this study. At this semi-experimental study 120 students of medicine received a 5 unit PPD during 6 months (Jan 2003 to may 2004). We excluded students with malnutrition, immunocompromised disorder and recipient of Cortona, from the study. The measurements were made at 72 hours were significantly (p)