Latent Tuberculosis Infection in the United States

A healthy 43-year-old woman presents for a pre-employment physical examination. She is originally from Ghana and came to the United States 18 months ago. Her employer, a hospital, requires a tuberculosis test. She reports having no known exposure to tuberculosis and no cough, fevers, or weight loss. Her physical examination is unremarkable. What screening test would you recommend, and how would you decide whether treatment is needed?