How was your father diagnosed to have pulmonary tuberculosis
If his sputum sample was positive for AFB ( acid fast Bacilli) before treatment , you can get it repeated to see if your father is responding to treatment.
If your fathers treatment was started empirically ( based on clinical features with tests being negative ) fever
should come down by 4 weeks.
If your fathers Diabetes
is not under control ( fasting sugar
Discuss with your doctor about the possibility of other diagnoses and also consider resistant tuberculosis
if sputum sample was positive