Stool form is an important indicator of digestive health and how efficiently the body is processing food and waste. Abnormal stool shapes can signal issues like dehydration, gut inflammation, slow or fast transit time, or imbalances in the microbiome.

Occult blood refers to hidden blood in the stool that isn’t visible to the eye but can signal bleeding somewhere in the digestive tract. Its presence may indicate conditions like polyps, inflammatory bowel disease, ulcers, or early signs of colorectal cancer, making it an important marker for further investigation.

Salmonella infection usually results from ingestion of the bacteria from contaminated food, water or hands. Eggs, milk, meat or poultry are particularly high risk foods.

Campylobacter infection (campylobacteriosis) is a bacterial infection which most commonly causes gastroenteritis (also known as ‘gastro’) but may also cause illness affecting the entire body.

Shigella infection (shigellosis) is a type of gastroenteritis caused by Shigella bacteria. The symptoms of Shigella infection include fever, diarrhoea, (sometimes with blood and mucous), vomiting and stomach cramps.

This infectious bacteria can cause gastroenteritis and symptoms beyond the gut. Symptoms include diarrhoea, nausea, vomiting, fever and abdominal pain. It can mimic appendicitis or Crohn’s disease.

Aeromonas are bacteria that can cause an acute diarrhoeal illness that normally clears without treatment. It is a fairly common cause of gastroenteritis, which occurs most often throughout the warm summer months in most countries.

Symptoms of Giardia infection can occur with 3 to 25 days and may include diarrhoea, nausea, vomiting, pale greasy foul-smelling stools, stomach cramps, passing excess gas, bloating, weight loss and fatigue.

Cryptosporidium is a microscopic parasite that causes the diarrhoeal disease cryptosporidiosis. Both the parasite and the disease are commonly known as “Crypto.”

The bacteria can be present in the gut for months or year and misdiagnosed as IBS. Infection can cause diarrhoea, abdominal pain and cramping, anal itching, nausea, loss of appetite, headache, dizziness, depression, weight loss and fatigue.

Amoebiasis is a parasitic disease (also known as amoebic dysentery) caused by infection with Entamoeba histolytica or another amoeba (for example, E. dispar). The disease may not cause symptoms in most individuals.

Some research suggests that people with IBS may be more likely to have Blastocystis hominis organisms in their stool.