<prompt> Mantoux test reading of less than 5mm indicatesTuberculosis infectionDisseminated TBSusceptiblity to TBImmunity to TB  <response>: Ref Robbins 9e 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 