A nurse is reinforcing discharge teaching with a client who has a new diagnosis of tuberculosis. Which of the following instructions should the nurse include in the teaching?

"You should have a sputum examination every 4 weeks."

"You should obtain a chest x-ray every 3 months."

"You should schedule a tuberculin skin test every 6 months.”

"You should stop taking your antituberculin medication after 2 weeks."