Entamoeba histolytica (Amebiasis) - Information for Patients
What kind of infection is it?
Entamoeba histolytica is a single celled parasite.
How do people get infected?
- E. histolytica is most common in tropical countries with poor sanitation.
- People develop infection with E. histolytica (amebiasis) when they put something in their mouth or swallow something that is contaminated with the stool (poop) of a person with amebiasis.
- Infections often occur among people who have lived in or traveled to poor tropical countries.
- E. histolytica can be transmitted during sexual activity.
What are the usual symptoms?
- Most people who are infected with E. histolytica never develop any symptoms.
- If symptoms develop, it is usually several weeks after exposure.
- Symptoms can include mild diarrhea, to severe diarrhea with blood or mucous in the stool and stomach pain. Weight loss is common.
How long does it last?
- Without treatment symptoms often last many weeks.
How is it treated?
- Prevent and treat dehydration. Warning signs of dehydration include dry mouth, decreased urination, or dizziness.
- A number of prescription drugs can be used to treat E. histolytica. Take any medication you are prescribed as directed.
Are there possible complications?
- Dehydration can occur. Prevent and treat dehydration. Warning signs of dehydration include dry mouth, decreased urination, or dizziness.
- E. histolytica can rarely cause pockets of pus (abscesses) to develop in the liver, lung or brain.
Comments:
- Wash hands carefully after using the bathroom, changing diapers and before and after cooking.
- The best way to avoid E. histolytica is to avoid food and water that may be contaminated with human waste.
- When traveling to poor countries, avoid untreated water or ice made with untreated water. Eat cooked foods that are served hot.