A 47-year-old member asked:
Positive ppd reading if red?
1 doctor answer • 3 doctors weighed in
Family Medicine 58 years experience
Ppd reading red?: No redness does not mean it is positive.You feel the induration in mms to interpret it after 48 to 72 hours.5mm or more is positive in HIV posotive person, in someone with recent exposure to tb, with nodular or fibrotic changes on xray consistant with healed TB and patients with organ transplant and immunocompromised
10mm or more +in recent arrivals from high prevalace ares
15mm + in.
Created for people with ongoing healthcare needs but benefits everyone.
5.7k viewsReviewed >2 years ago
Last updated Sep 28, 2016
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.