It is the primary facultative anaerobe of the human gastrointestinal tract.

For humans in particular, see human gastrointestinal tract.

A gastrojejunocolic fistula is a disorder of the human gastrointestinal tract.

Studies suggest up to 10% of human gastrointestinal tracts may be colonized by L. monocytogenes.

The entire lifecycle - from egg to adult - takes place in the human gastrointestinal tract of a single human host.

Fiber is defined as material made by plants that is not digested by the human gastrointestinal tract.

E. aerogenes is generally found in the human gastrointestinal tract and does not generally cause disease in healthy individuals.

Because the human gastrointestinal tract is unable to digest human hair, the trichobezoar may have to be treated surgically.

In the best-case scenario, only 15% of ingested naringenin will get absorbed in the human gastrointestinal tract.

Intestinal helminths, a type of intestinal parasites, reside in the human gastrointestinal tract.

H. alvei is a commensal of the human gastrointestinal tract and not normally pathogenic, but may cause disease in immunocompromised patients.

The common bile duct (ductus choledochus) is a tube-like anatomic structure in the human gastrointestinal tract.

In the human gastrointestinal tract, bacteria exchange signals with each other and with human epithelial and immune system cells.

The ability of the technique to simultaneously assess morphology and function, makes it an ideal medium for investigation of the physiology of the human gastrointestinal tract.

Entamoeba coli is a non-pathogenic species of Entamoeba that frequently exists as a commensal parasite in the human gastrointestinal tract.

Under Dobell, Bishop studied parasitic amoebae found in the human gastrointestinal tract, focusing on the species responsible for amoebic dysentery, Entamoeba histolytica.

It is used as an insoluble heavy additive to oil well drilling mud, and in purer form, as an X-ray radiocontrast agent for imaging the human gastrointestinal tract.

His current area of research is wireless access and localization for body area networks with focus on localization for wireless video capsule endoscopy inside the human gastrointestinal tract.

There are also free amoebae, or trophozoites, that do not form cysts, however trophozoites do not survive long outside of the human gastrointestinal tract, and are a purely diagnostic observation.

London physician Dr. John Snow first publishes his theory that cholera is a contagious disease of the human gastrointestinal tract in his pamphlet On the Mode of Communication of Cholera.

The leaves and roots of E. angustifolium are also edible and, because of their astringent properties, used by the Yupik peoples for medicinal purposes, through a process of decoction, infusion or poultice, to treat aliments of the human gastrointestinal tract, and in the Old World for the treatment of diarrhoea.