Prolonged diarrhoea in the adult

Giardiasis

Pneumonia

Nausea and vomiting

Dyspepsia

HIV infection

Haematemesis

Listeriosis

Colonoscopy and sigmoidoscopy

Cirrhosis of the liver

Elevated ESR (hypersedimentation)

Tularaemia

Anal abscess

Primary sclerosing cholangitis

Whooping cough

Hereditary angioedema (HAE) and ACE inhibitor-induced angioedema

Gastro-oesophageal reflux disease

Malaria

Vaccinations

Acute porphyria