If you test positive for giardia antigen will you always test positive or will you only test positive with new exposure?

If you test positive for giardia antigen, it typically indicates an active infection, but it does not necessarily mean you will always test positive. After the infection clears, the antigen may no longer be present, and you will test negative unless there is a new exposure to the parasite. Positive results can also reflect ongoing infection, so follow-up testing is important for confirmation and to determine the appropriate treatment.