True statement regarding `tuberculine test’ is ?
Correct Answer: More than 1 Omm induration in 72 hrs. indicates positive test
Description: Ans. is 'c' i.e., More than 10 mm induration in 72 hrs indicates positive test Repeat tuberculin test (two step testing) o Induration is measured, erythtna is not taken into account. Uses of tuberculin test o Diagnosing active infection in infants and young children. o Measure prevalence of infection. o Select susceptibles. o As an indication of sucessful vaccination.
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