Cryptosporidium muris Due to the wide variety of<unk>  parasites, a description of the symptoms rarely is sufficient for diagnosis. Instead, medical personnel use one of two common tests: they search stool samples for the parasites, or apply an adhesive to the anus to search for eggs. Types Major groups of parasites include protozoans (organisms having only one cell) and parasitic worms (helminths). Of these, protozoans, including cryptosporidium, microsporidia, and isospora, are most common in HIV-infected persons. Each of these parasites can infect the digestive tract, and sometimes two or more can cause infection at the same time.
Intestinal parasite infection
Soil-transmitted helminthiasis
Pinworm infection
Hookworm infection
Intestinal infectious diseases
Behavior-altering parasite
Protozoan infection
Foreign body in alimentary tract