Here are some infections that is related to the digestive system.
Gastritis
Inflammation of the stomach. Caused by stress, fungi, alkalis, poisons and corrosives. To cure, one should take more vitamin A and E which is found in seeds, nuts, corn and fish.
Sprue
Intestinal disease. Sore mouth and tongue, severe diarrhea and large amount of fat in solid waste. Caused by lack of vitamin B.
Pancreatitis
Inflammation of the pancreas. The pancreas will not be able to produce certain enzymes thus causing digestion to be incomplete. A lot of gas is formed and fat is lost in the solid waste. To cure it, one should take more oil.
Ameba, worms and other intestinal parasites.
Caused by lack of vitamin A. Absorbs nutrients from your body. Can be cured by having a more nutritional diet.