Endolimax nana . E. nana cysts in concentrated wet mounts. Cysts of Endolimax nana vary from spherical to ellipsoidal in shape and measure 5–10 µm. Mature cysts have four small nuclei with large, usually centrally located karyosomes and no peripheral chromatin.
Entamoeba coli, E. hartmanni, E. polecki, Endolimax nana, and Iodamoeba buetschlii are generally considered nonpathogenic and reside in the large intestine of the human host . Both cysts and trophozoites of these species are passed in stool and considered diagnostic .
Endolimax nana is a small ameba that typically produces ovoid cysts measuring 5–14 μm in diameter (Figure 13(e)). They can be confused with cysts of E. histolytica and E. hartmanni because of cyst size and the presence of four nuclei. Large and distinct nuclear karyosome, however, distinguishes this ameba from other species of Entamoeba.
Nov 4, 2015 · The cysts of Endolimax and E. hartmanni both have four nuclei but can be differentiated by E. nana having a larger punctuate karyosome and peripheral chromatin, both of which features however may be quite difficult to discern.[8,47] Endolimax stains with both Ziehl–Neelsen and trichrome.
- Casper Sahl Poulsen, Christen Rune Stensvold
- Casper Sahl Poulsen, Christen Rune Stensvold
- 2016
- 10.4103/2229-5070.175077
Symptomatic people who are found to have these protozoa in their stool should be examined for other causes of their symptoms. The nonpathogenic intestinal protozoa include: Chilomastix mesnili. Endolimax nana. Entamoeba coli. Entamoeba dispar. Entamoeba hartmanni. Entamoeba polecki. Iodamoeba buetschlii.
Key Points Amebiasis is infection with Entamoeba histolytica. It is acquired by fecal-oral transmission. Infection is commonly asymptomatic, but symptoms ranging from mild diarrhea to severe dysentery may occur. Extraintestinal infections include liver abscesses.
Jul 22, 2021 · INTRODUCTION Several nonpathogenic protozoa inhabit the intestinal tract and may be identified in stool specimens sent to the clinical laboratory for ova and parasite examination [ 1,2 ].
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