Tuberculin test is said to be positive when there is.
- A positive tuberculin test is when an induration of diameter 10 mm more is present. - erythema is not taken into account. - It indicates hypersensitivity to tuberculoprotein, denoting infection with tubercle bacilli or BCG immunisation , recent or past with or without clinical disease. Reference : Anathanarayan & paniker&;s 9th edition, pg no: 354,355
Induration
Erythema
Erythema, induration
Induration with blistering
Infectious disease