By Gary M. White, MD

Exudative ulceration with necrosis perianally associated with diarrhea is one manifestation of cutaneous amebiasis. The organism is Entamoeba histolytica. Mobile trophozoites may be seen on saline mount. Patients may acquire amebiasis by having vaginal or anal sex with a person suffering from amoebic dysentery.

Cutaneous manifestations of amebiasis include:


The typical case, when transmitted sexually, is a male who develops a painful penile ulcer which progresses rapidly with a mucopurulent discharge. Ulcerations may occur perianally as well.

Cutaneous ulcers may form from direct extension of an underlying amebic abscess. These are most common on the trunk and groin.


An infectious disease expert should be consulted. Metronidazole 750 mg. TID may be used. Abscesses may need to be drained.


An extremely painful ulcer of the glans penis. Indian Journal of STDs

Perianal ulceration. JAAD June 2009;Volume 60, Issue 6, Pages 897–925

Amebic abscess extending to skin causing a cutaneous ulcer. Illustrated lecture notes in Tropical Medicine


Homepage | FAQs | Use of Images | Contact Dr. White

It is not the intention of to provide specific medical advice, diagnosis or treatment. only intends to provide users with information regarding various medical conditions for educational purposes and will not provide specific medical advice. Information on is not intended as a substitute for seeking medical treatment and you should always seek the advice of a qualified healthcare provider for diagnosis and for answers to your individual questions. Information contained on should never cause you to disregard professional medical advice or delay seeking treatment. If you live in the United States and believe you are having a medical emergency call 911 immediately.