Suggest Treatment For Recurring Typhoid Fever

hi sir, i m suffering from typhoid fever .d its coming again d again.i think wit in 3yr i got three times .d i had taken medicine for that.but a few day before i went for widal test d my report was s. typhi O 1/80 d s. thyphi H was 1/80 is its ok or i have to go again for treatment.d i already had taken vaccine .my question is its possible to eradicate this disease from my body or kill bacteria completely