The GI tract organs include the esophagus, stomach, small and large intestine.
The second group have a problem in their large intestine.
This is because the symptoms are similar to other illnesses that affect the large intestine.
Bacterial activity Many bacterial species colonize the large intestine and form a symbiotic relationship with man each deriving some benefit from the other.
There may be pain in the right lower quadrant where the contents from the small intestine enter the large intestine (caecum ).