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      • Cysts and trophozoites are passed in feces . Cysts are typically found in formed stool, whereas trophozoites are typically found in diarrheal stool. Infection by Entamoeba histolytica occurs by ingestion of mature cysts in fecally contaminated food, water, or hands.
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  2. Nov 14, 2021 · Entamoeba coli is one of many non-pathogenic protozoa found in humans. It is transmitted through fecal-oral contact, and the mature cyst can be found in contaminated water. Typically, these protozoa inhabit the large intestinal tract and can be identified in diagnostic stool specimens.

  3. Current U.S. treatment guidelines recommend as first line treatment either iodoquinol 650 mg PO three times a day for 20 days in adults and 30-40 mg/kg/d PO in three divided doses for 20 days in children OR paromomycin 25-35 mg/kg/d PO in three divided doses for 7 days in both children and adults. Amoebic liver abscess

  4. Trophozoites of E. coli measure 15–50 μm and have a single nucleus with irregular peripheral chromatin and a usually eccentric karyosome. The cytoplasm is often described as “dirty” and may contain vacuoles and ingested food particles, including bacteria, yeast, and even other intestinal protozoa. Cysts are 10–35 μm in diameter.

  5. Entamoeba coli – Trophozoite. Common non-pathogenic commensal of human. Habitat in human: Large intestines. Trophozoites detected in faecal specimens of infected human. Diagnostic Features. Live parasites show sluggish movements. Size: 20 – 25 µm (range 15 to 50 µm) – larger than E. histolytica. Shape: Irregular with blunt pseudopodia.

  6. Cysts of Entamoeba coli are usually spherical, but may be elongated, and measure 10 to 35 µm. Mature cysts typically have 8 nuclei but may have as many as 16 or more. Entamoeba coli is the only species in the genus encountered in humans with more than four nuclei in the cyst stage. The nuclei may be seen in unstained as well as stained specimens.

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