<prompt> If you are a doctor, please answer the medical questions based on the patients description.My father 72yrs age was not wel for a few days. Subsequently tested positive for typhoid in blood test and admitted to hospital 20 days ago. At hospital all tests were negative. He used to have on off low grade fever during his stay at the hospital even to date. After CT scan, his large intestine tine lining was showing some thickness. Tested for TB, results were vaguely positive. Medication for TB in progress since last 6 days. However, the low grade fever is continuing and loss of appetite, weakness etc.. Continue... Please advise help...  <response>: HelloSign tuberculosis is in intestine and anti-tubercular treatment advised, you took it. Still you are having low grade fever, this is a cause of concern. Such type of fever may be due to these possibilities, these include :1 Multi Chat Doctor. 2 If proper and WHO recommended anti-tubercular treatment was not taken.3 Typhoid, diagnosis can be confirmed by Tidal test with serology test. Either upload all report of this side or consult a pulmonologist and take his consultation. In your case it is important because already you have taken 6 months, so this is cause of concern. 