Diagnosis of Ulcerative Colitis
A patient who presents with several weeks of symptoms is not likely to have an infectious cause. Nevertheless, stool cultures are mandatory particularly looking for amoebic parasites. Full blood count, protein levels, inflammatory markers ESR and CRP are checked. Rigid sigmoidoscopy generally establishes the diagnosis but a colonoscopy with biopsies is necessary to ascertain the extent of the disease. A standard colonoscopy with bowel preparation can make an active colitic patient extremely sick.