Table 1.

Cut-off size of reaction for a positive Mantoux test

≥5 mm	≥10 mm	≥15 mm
Children in close contact with patients with infectious tuberculosis	Children with increased risk of disseminated disease	Children with no risk factors
Children with clinical evidence of possible tuberculosis	Children with increased risk of exposure to tuberculosis
Children with radiological features suggestive of previous or active tuberculosis
Children with immune-suppressive conditions (including HIV)

* Source ¹⁴