An induration of five (5) millimeters or greater is significant (or positive) in the following:
An induration of ten (10) millimeters or greater is significant (or positive) in all other persons tested in Mississippi. A tuberculin skin test is recorded in millimeters of induration. For accurate results, measure the widest diameter of the palpable induration transverse (across) the arm.
15 Miss. Code. R. 16-1-83.2.14