What is ptb undetermined activity? and how to cure?

This sounds like the: terminology that might be used in a chest x-ray report. It means "pulmonary tuberculosis of undetermined activity." The image suggests some exposure to TB, but whether or not it is an active or old infection can not be determined by the image alone. Further testing (sputum, possibly skin/blood tests or further imaging) can clarify. Then curative antibiotic treatment can be recommended. Good wishes