A 14-year-old asymptomatic boy whose father has just been diagnosed with pulmonary TB undergoes a Mantoux test, with a negative result. What is the appropriate course of action?
In young contacts, chemoprophylaxis should be started even if the mantoux test is negative and repeated after 2-3 months to decide whether to continue treatment for 6 months (if it turns positive) or to stop it.
Reassure her that she is not at risk.
Chest X-ray.
Start chemoprophylaxis and repeat skin test after 3 months.
Repeat skin test at one month.
A sputum study should be performed before starting chemoprophylaxis with Isoniazid for 1 year.
In young contacts, chemoprophylaxis should be started even if the mantoux test is negative and repeated after 2-3 months to decide whether to continue treatment for 6 months (if it turns positive) or to stop it.