Amoebic colitis is a type of infectious colitis, more common in tropical and subtropical areas. The causative agent is a trophozoite of Entamoeba histolytica. The cyst form may live normally in the colon as commensal.
Amoebic colitis presents with abdominal pain and dysentery.
- appearances of infectious colitis on CT are variable and nonspecific
- amoebic colitis may present with ulceration and skip lesions mimics Crohn's disease
- collar button or aphthus ulcers
- ameboma: large lesions mimic cancer
- any part of the colon may be involved, but typically the cecum and rectum are more severely affected
- ileum is spared; helps to differentiate it from Crohn's or TB which typically involves the terminal ilium
Treatment and prognosis
Antiparasitic therapy for amoebic colitis requires confirmation with laboratory investigation, including fecal exam.
- bowel perforation
- amoebic liver abscess