What Parasite Causes A Severe Watery Diarrhea?

What Parasite Causes A Severe Watery Diarrhea? Giardia infection is an intestinal infection marked by stomach cramps, bloating, nausea and bouts of watery diarrhea. Giardia infection is caused by a microscopic parasite that is found worldwide, especially in areas with poor sanitation and unsafe water. Do intestinal parasites cause diarrhea? A person with intestinal worms