>15 mm induration (Heaf 3-4) The Mantoux test is preferred in the United States for the diagnosis of tuberculosis; multiple puncture tests, such as the Heaf test and Tine test, are not recommended. References Joint Tuberculosis Committee of the British Thoracic Society, Control and prevention of tuberculosis in the United Kingdom: Code of Practice 2000 BMJ 2000:55:887-901. Table 3 Heaf Test grading, reaction, and equivalent Mantoux positive levels. Immunologic tests Tuberculosis