A 34-year-old male patient visits a physician with complaints of fatigue, weight loss, night sweats, and "swollen glands." The physician also observes that he has an oral yeast infection. Which of the following tests would most likely reveal the cause of his problems?
A test for CD8 lymphocytes A human T-lymphotropic virus type I (HTLV-I) test An HIV ELISA test A test for infectious mononucleosis