Protozoa-Giardia (Feces-Water)
Giardia cysts on the other hand are very resistant to harsh environmental factors and can survive outside the host for prolonged periods. Giardiasis is most often linked to consumption of contaminated water, but raw produce and other foods have also been considered as possible vectors. Giardia lamblia causes the disease Giardiasis with symptoms of diarrhea, abdominal bloating, stomach cramps, nausea, vomiting, malabsorption syndrome causing steatorrhea (fat in the stool) fatigue and severe weight loss in chronic infections.