• Alternative Names

    Giardia; Traveler's diarrhea - giardiasis


    Some infections go away on their own. Anti-infective medicines may be used.

    Cure rates are generally greater than 80%. Drug resistance may be a factor in treatment failures, sometimes requiring a change in antibiotic therapy.

    In pregnant women, treatment should wait until after delivery, because some drugs used to treat the infection can be harmful to the unborn baby.

    Support Groups

    Expectations (prognosis)

    It is common for the infection to go away on its own. However, persistent infections have been reported and need further antibiotic treatment. Some people who have had Giardia infections for a long time continue having symptoms even after the infection has gone.

    • Dehydration
    • Malabsorption (inadequate absorption of nutrients from the intestinal tract)
    • Weight loss

    Calling your health care provider

    Call your health care provider if:

    • Diarrhea or other symptoms last for more than 14 days
    • You have blood in the stool
    • You are dehydrated