[Guest]

GOOD EVENING DOCTOR,
I WOULD LIKE TO KNOW THE EFFICACY OF TUBERCULIN SKIN TEST IN DIAGNOSIS OF TB.IS THERE A DIFFERENCE BETWEEN 72 HOUR SAMPLE AND 24 HOUR SAMPLE?

[Guest]

48 to 72 hours is the standard time needed for an appropriate reading of a PPD skin test for TB.
[quote] GOOD EVENING DOCTOR,
I WOULD LIKE TO KNOW THE EFFICACY OF TUBERCULIN SKIN TEST IN DIAGNOSIS OF TB. IS THERE A DIFFERENCE BETWEEN 72 HOUR SAMPLE AND 24 HOUR SAMPLE... [/quote]