The clinical spectrum of intestinal E. histolytica infection ranges from an asymptomatic carrier state to severe invasive disease. Asymptomatic cyst carriage occurs with E. histolytica as well as E.

A microscopic parasite, cryptosporidium can be hard to avoid. Being infected by the bug leads to an illness called ...

Giardiasis, caused by the protozoan Giardia intestinalis, is the leading cause of intestinal parasitic infections in humans and pets, in particular dogs. Some of the main symptoms are diarrhea ...