A relapse of
typhoid fever is generally milder and of shorter duration than the initial illness. In rare cases, second or even third relapses occur. Notably, the relapse rate is much lower following treatment with the new
quinolone drugs, which have effective intracellular penetration.
Previous infection does not confer immunity. In any suspected relapse, infection with a different strain should be ruled out.
CAUSES : ineffective treatment,
ineffective
vaccination,
typhoid carrier .
by your history it seems , relapse in your case may be of ineffective treatment or it may be of new strain infection also. so investigations are needed to find it .
TREATMENT : advise : high caloric food intake
take plenty of fluid
rest the things will dealt by symptomatic treatment and quinoline groups of antibiotics
note: any symptoms like pain abdomen , sever
vomiting ,
high fever ,
diarrhea are noted then please visit physician .
I hope you satisfied with explanation