hi. abdominal TB is not usually contagious. u should get a chest x-ray and sputum examination done to rule out active pulmonary TB, or consult a chest & TB physician. enlarged lymphnodes are common in TB. there is a risk of perforation of gut from ulcers in small intestine. so u should avoid constipation and at the same time the diet should not be very high in fiber that will create high intra-luminal pressure in gut. so as to if u have deranged liver function tests the diet should be low in fat and protein. i do t think job will affect the timing of medication. u can take medication while on duty also. but the treatment should be regular for at least 6 months. the disease causes weakness in body, so have high energy diet and avoid hard work till recovery. get well soon.