I'm really worried about my mom. She seems to have some sort of lung issue because she's feeling fatigued a lot and has trouble breathing even just walking short distances or using the stairs. She had pleural effusion about three years ago, and now the symptoms seem to be coming back. Can you suggest what tests she should get to figure out what's going on?

Sputum for AFB,microscopy and x-ray chest is advised to the patient.