This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Mantoux test reading of less than 5mm indicates 
Select and explain. 
A. Tuberculosis infection, B. Disseminated TB, C. Susceptiblity to TB, D. Immunity to TB
B: Disseminated TB
Answer: B: Disseminated TB 
Explanation: 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