Hi thanks for asking question.
For diagnosis TB sputum examination or histopathological examination helpful.
From suspicion area of stomach
biopsy can taken.If biopsy report positive then TB confirmed and
antituberculous treatment started.
Regarding diet following are some suggestions.
Take fruits more.
Green leafy veg taken more.
Apples, carrots , whole grain , spinach etc.useful.
Avoid tea and coffee in excess.
Avoid smoke and alcohol.
Avoid
trans fat foods and excess fatty and fried food not taken.
Omega 3 fatty acid food could be useful like olive oil or sunflower oil.
Protein diet useful.
If your condition worsening then USG needed.
Avoid refined sugar and food.
Wish you good health.
Regards;
Dr.parth