A PPD result larger than what measurement is referred to the Military Public Health Office?

A PPD result larger than what measurement is referred to the Military Public Health Office?

• A. >=10 mm
• B. >5 mm
• C. >15 mm
• D. >=8 mm

Answer: (B)

Tuberculin skin testing uses the size of the induration to decide if a person should be referred for TB evaluation. After a PPD injection, the induration is measured in millimeters 48 to 72 hours later. In many settings, the threshold for a positive result depends on risk factors. In military contexts, the threshold is set quite low to catch possible infection early because of close living quarters and higher exposure risk. A PPD induration larger than 5 millimeters is considered positive and warrants referral to the Military Public Health Office for further TB evaluation. This means any result just above 5 mm prompts a follow-up, such as medical history review, chest imaging, and additional testing as needed. Thresholds like 10 mm or 15 mm are used for lower-risk groups in other guidelines, so they would not be the trigger in this specific military context.

Tuberculin skin testing uses the size of the induration to decide if a person should be referred for TB evaluation. After a PPD injection, the induration is measured in millimeters 48 to 72 hours later. In many settings, the threshold for a positive result depends on risk factors. In military contexts, the threshold is set quite low to catch possible infection early because of close living quarters and higher exposure risk. A PPD induration larger than 5 millimeters is considered positive and warrants referral to the Military Public Health Office for further TB evaluation. This means any result just above 5 mm prompts a follow-up, such as medical history review, chest imaging, and additional testing as needed. Thresholds like 10 mm or 15 mm are used for lower-risk groups in other guidelines, so they would not be the trigger in this specific military context.