Follow-up to AFB

This was the 83 y/o man with no COPD, no TOB Hx with a respiratory tract infection with AFB growth from the sputum.
I ended up doing a combination of the suggestions from JJ and Jeff H: I hoped and assumed the AFB was not TB but with the positive PPD, and since I should not start just INH, I did initiate therpay with 4 drugs for TB.
The Cxs came back with a pan-sensitive MTb, ETH was discontinued and he is doing very well on RIF/PZA/INH.
Are you surprised at the paucity of symptoms and fairly benign CxR? I know Tb can present in many unusual ways but I like to see at least something abnormal with TB...