Entamoeba Histolytica Overview and Treatment

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Journal of infectious diseases and diagnosis is an open access rapid peer reviewed journal in the field of Bacterial, Viral and Fungal Diseases. It is a bimonthly journal.

Entamoeba histolytica is an anaerobic parasitic amoebozoan, part of the genus Entamoeba. Predominantly infecting humans and other primates causing amoebiasis, E. histolytica is estimated to infect about 35-50 million people worldwide. E. histolytica infection is estimated to kill more than 55,000 people each year. Previously, it was thought that 10% of the world population was infected, but these figures predate the recognition that at least 90% of these infections were due to a second species, E. dispar. Mammals such as dogs and cats can become infected transiently, but are not thought to contribute significantly to transmission

Symptoms

Signs and symptoms of Entamoeba histolytica include:

The symptoms are often quite mild and can include loose feces (poop), stomach pain, and stomach cramping. Amebic dysentery is a severe form of amoebiasis associated with stomach pain, bloody stools (poop), and fever. Rarely, E. histolytica invades the liver and forms an abscess (a collection of pus)

Transmission

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 infection can occur when a person puts anything into their mouth that has touched the feces of a person who is infected with E. histolytica, swallows something, such as water or food, that is contaminated with E. histolytica, or swallows E. histolytica cysts (eggs) picked up from contaminated surfaces or fingers. The cysts are readily killed by heat and by freezing temperatures, and survive for only a few months outside of the host. When cysts are swallowed they cause infections by excysting (releasing the trophozoite stage) in the digestive tract.

Treatment

There are a number of effective medications. Generally several antibiotics are available to treat Entamoeba histolytica. The infected individual will be treated with only one antibiotic if the E. histolytica infection has not made the person sick and most likely be prescribed with two antibiotics if the person has been feeling sick. Otherwise, below are other options for treatments.

Intestinal infection

Usually nitroimidazole derivatives (such as metronidazole) are used because they are highly effective against the trophozoite form of the amoeba. Since they have little effect on amoeba cysts, usually this treatment is followed by an agent (such as paromomycin or diloxanide furoate) that acts on the organism in the lumen

Liver abscess

In addition to targeting organisms in solid tissue, primarily with drugs like metronidazole and chloroquine, treatment of liver abscess must include agents that act in the lumen of the intestine to avoid re-invasion. Surgical drainage is usually not necessary except when rupture is imminent.

People without symptoms

For people without symptoms (otherwise known as carriers, with no symptoms), non endemic areas should be treated by paromomycin, and other treatments include diloxanide furoate and iodoquinol. There have been problems with the use of iodoquinol and iodochlorhydroxyquin, so their use is not recommended. Diloxanide furoate can also be used by mildly symptomatic persons who are just passing cysts.

Journal of infectious diseases and diagnosis announces papers for the upcoming issue. Interested can submit their manuscript through online portal

Submit manuscript at http://www.longdom.org/submissions/infectious-diseases-diagnosis.html or send as an e-mail attachment to the Editorial Office at editor.jidd@longdomjournal.org

Media contact:

Eliza Grace

Managing Editor

Journal of Infectious Diseases and Diagnosis

Mail ID: editor.jidd@longdomjournal.org