Entamoeba Histolytica

All about it

Pathogen Information

It is a single-celled protozoan capable of infecting a wide variety of hosts. is a parasite that can make people sick. It’s not very common in the U.S., where it usually affects people who traveled here from a country with poor sanitation that aren’t very clean. It is associated with the disease amebiasis.

Type, TIme of Onset and Duration of the Disease

Type- it is not a very deadly disease if it can be treated in time. The symptoms usually occur within months of the disease entering the body. The severity of the symptoms associated with intestinal amebiasis ranges from mild diarrhea to a severe, dysentery-like illness with mucus and blood in the diarrhea and abdominal distention. Onset- Invasive intestinal disease may occur days to years after initial infection, however, the condition generally will be manifested within 2 to 4 weeks after first exposure to this parasite. Duration- It may reside in the intestine for years without causing symptoms. The entering of the intestine will cause symptoms that can last from a few days to several weeks, in the absence of treatment.


Entamoeba is passed in the bowel movements of infected people and can spread to others. For example, food can become contaminated if it’s handled by an infected person who didn’t wash his or her hands well after a bowel movement, or if contaminated water is used for growing fruits or vegetables or to rinse them afterwards.

It usually infects people you have been to or around someone who has been to a country with poor sanitation. You can get it anywhere but its mostly in third-world countries that aren't really clean such as Africa, Mexico, parts of South America, and India have significant health problems associated with this disease.


Avoid all contact with another persons anal areas. Also make sure they washed their hands after bowel movements if they touch you or give you something basically things we do already. Also you should wash fruits and vegetables unless that will ruin them.


Treatment depends on the severity of infection. Usually, metronidazole is given by mouth for 10 days. This is followed by paromomycin or diloxanide.

If you are vomiting, you may need to medications through a vein (intravenously) until you can take them by mouth. Medicines to stop diarrhea are usually not prescribed because they can make the condition worse.

After treatment, the stool should be rechecked to make sure that the infection has been cleared. Just go to the doctor and they will tell you what you need.

Additional Information

It is usually found in areas that are warm and unsanatized. The active (trophozoite) stage exists only in the host and in fresh loose feces; cysts survive outside the host in water, in soils, and on foods, especially under moist conditions on the latter. The cysts are readily killed by heat and by freezing temperatures, and survive for only a few months outside of the host. It is estimated, however, that amebiasis causes up to 110,000 deaths a year. The causal agent, Entamoeba histolytica, was discovered in Russia in 1873 by Friedrich Losch.

Pictures of the Disease and symptoms

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