Mantoux test reading of less than 5mm indicates
Ref Robbins 9/e p371 Mantoux test is simply able to predict the presence or absent of cell mediated immunity against the tubercular antigens .it cannot differentiate between infection and disease Negative mantoux test just indicates that the individual has not been exposed to tuberculin bacilli
Tuberculosis infection
Disseminated TB
Susceptiblity to TB
Immunity to TB
General anatomy