Hi Plz My Mother Had GSE 3 Weeks Ago Revealed

hi plz my mother had GSE 3 weeks ago revealed E histolytica took negazole then she had an attack of blood per rectum when she defecates for 1 day made another GSE normal took deloxinide and ciftriaxone inj blood disapeard within day now only diarrhea remained shes having since 2 month what to do,????? is there any risk of Ca colon ,??? shes 55 years

thanks
tania