<s>[INST] Is it possible for TB infection to come back after being treated? My husband was diagnosed with TB years ago and it has been treated. He's 32 years old, about 5'7" in height, and weights 55 kgs. He had his x-ray 2 days ago and the doctor said that the TB virus is active again... and other test shows that his sugar level exceeded to normal. [/INST] HelloTuberculosis was treated successfully years ago , according to you. Now your husband get X Ray 2 days ago ? Bu why ?You didn't mention the cause of X RAY and about the symptoms , your husband is having.I want to tell you that  TUBERCULOSIS can recur , and more chances of recurrent if person was an old tubercular patient . Still I recommend you please get these tests .1 Sputum exam for A F B,Bronchoscopy,Chest X RAY,Screening for Pulmonary tuberculosis ,Sputum  AF B culture and sensitivity ( essential if treatment again),Polymerase chain reaction test .Purified protein derivative (PPD )-tuberculin test.As you mentioned that his blood sugar level is also elevated , so high sugar level is also a predisposing factor for recurrent infection in an old tubercular patient .If your husband have tuberculosis I recommend you please consult tuberculosis & chest specialist and get his opinion.Hope this information will help you. </s>