Entamoeba histolytica is an anaerobic parasitic protozoan, part of the genus Entamoeba. Predominantly infecting humans and other primates, E. Histolytica is estimated to infect about 50 million people worldwide.
Mixed infection of E. dispar with other parasites was also observed. Co-infection of E. histolytica with E. dispar was not observed 15. Specific DNA sequences have subsequently been identified and used as probes for the detection of pathogenic and non-pathogenic species 16. Antigen detection test for E. histolytica and E. dispar is more sensitive and specific than microscopy and is more reliable and rapid than zymoderne analysis for the differentiation of E. histolytica and E. dispar 4. Entamoeba histolytica is an anaerobic parasitic protozoan, part of the genus Entamoeba. Predominantly infecting humans and other primates, E. histolytica is estimated to infect about 50 million people worldwide. 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.  Predominantly infecting humans and other primates, E. histolytica is estimated to infect about 50 million people worldwide. 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. Entamoeba histolytica and another ameba, Entamoeba dispar, which is about 10 times more common, look the same when seen under a microscope. Unlike infection with E. histolytica, which sometimes makes people sick, infection with E. dispar does not make people sick and therefore does not need to be treated. Entamoeba histolytica/dispar. Entamoeba histolytica/dispar. Intestinal Protozoa: Amoebae. The pathogenic Entamoeba histolytica and non-pathogenic Entamoeba dispar are indistinguishable in stained smears and must be reported as E.histolytica/dispar until speciation can be confirmed by serologic or antigenic means. Amebiasis. [Entamoeba histolytica]. Cyst of E. histolytica / E. dispar stained with trichrome. Note the chromatoid body with blunt ends (red arrow). Trophozoites of E. histolytica with ingested erythrocytes stained with trichrome. The ingested erythrocytes appear as dark inclusions. Entamoeba histolytica is one of the more serious of the parasitic infections of humans, affecting an estimated 50 million persons worldwide. It is an amoeba, meaning a single cell organism that divides by binary fission and can replicate in the intestinal tract, primarily in the large intestine or colon.  Clinical Significance. Entamoeba histolytica are intestinal parasites that infect a half billion people worldwide annually. Of those infected, most are infected with the non-pathogenic E. dispar, which has not been associated with disease.  E. histolytica/E. dispar cyst with three visible nuclei (arrows). E. histolytica/E. dispar cyst with one visible nucleus and a glyco-gen vacuole (arrow). E. histolytica/E. dispar cyst in iodine with one visible nucleus and a glycogen vacuole (arrow). E. histolytica/E. dispar cyst in iodine with two visible nuclei and a chromatoid body (arrow). 2. Laboratory diagnosis of amebiasis. E. histolytica/E. dispar trophozoite with a progressive pseudopod (arrow). E. histolytica/E. dispar. cyst showing a. chromatoid body with bluntly rounded. ends (arrow). E. histolytica. trophozoite with an in-. gested RBC (arrow).
http://www.jpma.org.pk/full_article_text.php?article_id=3506 https://en.wikipedia.org/wiki/Entamoeba_histolytica http://www.parasitetesting.com/Entamoeba-Histolytica.cfm http://thunderhouse4-yuri.blogspot.com/2011/03/entamoeba-histolyticadispar.html http://www.cdc.gov/dpdx/amebiasis/index.html http://entamoebahistolytica.org/ http://www.questdiagnostics.com/testcenter/TestDetail.action?ntc=34964 http://www.cdc.gov/dpdx/resources/pdf/benchAids/Entamoeba_benchaid.pdf
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