It was later determined that he had an infection of his gastrointestinal system.
From the sacbee.com
Perhaps it was the gastrointestinal infection that was diagnosed after the race.
From the sportsillustrated.cnn.com
They thus can cause gastrointestinal bleeding, among other adverse side effects.
From the sciencedaily.com
Ingesting hydrogen peroxide can cause gastrointestinal irritation or ulceration.
From the sciencedaily.com
They are not associated with upper gastrointestinal bleeding and renal toxicity.
From the en.wikipedia.org
At the same time, the bifidobacteria may promote better gastrointestinal health.
From the sciencedaily.com
The initial signs are gastrointestinal including nausea, vomiting, and diarrhea.
From the en.wikipedia.org
The gastrointestinal system is auscultated to note the presence of bowel sounds.
From the en.wikipedia.org
Most E. coli strains are harmless, but some can cause gastrointestinal illness.
From the stltoday.com
More examples
Of or relating to the stomach and intestines; "a gastrointestinal disorder"
Relating to the digestive tract.
The digestive system, which, in humans, is formed into a long passage that runs from the mouth to the anus. It is in this passage that food passes to be digested and absorbed, and where wastes are excreted.
Infrequent nausea, vomiting, loss of appetite, diarrhea, and/or constipation
Msm promotes proper digestion and absorption of nutrients. MSM supports healthy metabolism and digestion of starches, fats and proteins.
Heartburn, constipation, diarrhoea, nausea, coated tongue, bad breath, anorexia or increased appetite, vomiting, epigastric pains, dyspepsia, dehydration, parageusia.