Which of the following is not true about the Tuberculin test -: (A) It is only tool available for estimating the prevalence of TB in a community, (B) Induration of 10 mm indicates a positive test, (C) It is a specific test, (D) New cases occur more commonly in patients who are tuberculin reactors
Answer is C. The validity of tuberculin test is subject to variability. It is limited by lack of specificity Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 196