Cutaneous amoebiasis: what to know

The condition may appear as a sore, ulcer, irritated patch or wound that does not heal normally. The edges can enlarge, the surrounding skin can become inflamed, and pain or discharge may occur. The skin infection may follow contamination of broken skin, but a clinician must distinguish it from bacterial infection, fungal disease, inflammatory conditions and other causes of ulcers. Amoebiasis can also affect the bowel, where diarrhoea may occur, but a skin lesion does not establish the cause by itself.

Arrange a prompt GP consultation or dermatology assessment for a worsening, painful or non-healing lesion. Keep the area clean and covered with a fresh dressing, wash hands before and after touching it, and do not squeeze, scrape or apply leftover creams. Tell the clinician about travel, untreated water exposure, contact with soil or contaminated material, bowel symptoms, immune problems and recent medicines. Diagnosis may require examination and a sample from the lesion. Treatment is prescribed according to the identified organism and site; antibiotic treatment may be considered when a bacterial infection is present or suspected.

Seek urgent care if redness is rapidly spreading, pain is severe, the wound becomes black or foul-smelling, fever or chills develop, or you feel faint or seriously unwell. Get same-day advice for a lesion near the eye, extensive skin breakdown, or symptoms in a person with reduced immunity. Do not wait for a wound to improve on its own when it is enlarging or producing discharge.

Ask what other causes have been considered, whether a skin sample is needed, how to dress the area, whether bowel symptoms change the assessment, and which treatment side effects should prompt a call.