The correct answer is (D) Isonicotinic acid hydrazide (INH), rifampin, ethambutol, and pyrazinamide.
Standard therapy using INH and rifampin for classic, uncomplicated pulmonary tuberculosis is 9 months. The patient may not respond to therapy, even when the organism is susceptible to the antibiotics in vitro;
therefore, cultures must be kept for up to 1 year in order to facilitate testing of additional antibiotics should the infection become refractory to therapy.
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