Hello,
Welcome to Healthcaremagic.
I suspect it may be a relapse of
typhoid fever or it could be a other infective cause not only the
tuberculosis.
I need some clarification.
Whether typhoid is confirmed by widal as well as blood culture?
Whether he took antibiotics properly and completed the course?
If not then it may be a relapse of typhoid or other infection.
Usually some patients discontinue the antibiotics when they feel better even before the completion of full course.
DO the above said investigation. In addition, do
Complete blood count, Peripheral smear for malaria, urinalysis, blood culture.
Please do an ultrasound abdomen, to rule out any
organomegaly.
If you suspect tuberculosis, Do sputum examination and
mantoux test.
Consult a Physician with these reports.
Hope this helps.
Take care.