True about tuberculin test are all except:
A negative tubercle test indicates that the person has never come in contact with tubercle bacilli.
Parija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page: 355
Recent conversion in adult is an indication for ATT
INH prophylaxis is started, if the test is positive
No risk of developing TB, if tuberculin test is negative
May be false negative in immunocompromised patients