A diagnosis may be made by taking a history and doing a brief examination.<unk>  should not be confused with hematochezia, which is the passage of fresh blood through the anus, usually in or with stools. Physical exam The mouth, skin, and lips may appear dry due to dehydration. Lower abdominal tenderness may also be present. Stool and blood tests Cultures of stool samples are examined to identify the organism causing<unk> . Usually, several samples must be obtained due to the number of amoebae, which changes daily. Blood tests can be used to measure abnormalities in the levels of essential minerals and salts.
Dysentery
Ulcerative colitis
Travelers' diarrhea
Bacillary dysentery
Cholera
Porcine epidemic diarrhoea
Brainerd diarrhea
Jamaican vomiting sickness