Entamoeba Histolytica Overview

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary habitat of Entamoeba histolytica?

Small intestine of mammals
Large intestine of humans (correct)
In the soil
In freshwater environments

Which of the following stages is NOT part of the life cycle of Entamoeba histolytica?

Sporozoite (correct)
Cystic stage
Trophozoite
Pre-cyst

What characteristic structure is found in the trophozoite stage of Entamoeba histolytica?

Cilia
Chitinous shell
Flagella
Pseudopodia (correct)

Which of the following diseases is caused by Entamoeba histolytica?

<p>Amoebiasis (D)</p> Signup and view all the answers

What is the classification of Entamoeba histolytica within its kingdom?

<p>Protozoa (B)</p> Signup and view all the answers

Flashcards

What is Entamoeba histolytica?

A single-celled organism that causes amoebiasis, commonly found in the human large intestine. It's classified as a protozoan, specifically within the Rhizopoda class.

What is a trophozoite?

The active, feeding stage of Entamoeba histolytica. It moves using pseudopodia and contains a nucleus, cytoplasm, and a food vacuole.

What is a pre-cyst?

The stage in which Entamoeba histolytica prepares to form a cyst. It's smaller and rounder than a trophozoite, with a more defined cytoplasm.

What is a cyst?

A protective, resistant stage of Entamoeba histolytica that can survive outside the host. It's enclosed in a tough outer layer, enabling transmission.

Signup and view all the flashcards

What is a eukaryotic cell?

A type of cell that contains a nucleus and other organelles, found in many organisms, including Entamoeba histolytica. It's distinct from a prokaryotic cell.

Signup and view all the flashcards

Study Notes

Entamoeba Histolytica

Classification:
- Kingdom - Protista
- Phylum - Protozoa
- Class - Rhizopoda
- Genus - Entamoeba
- Species - histolytica
Distribution:
- Worldwide
Habit and Habitat:
- A common parasite in the large intestine of humans
- Also found in amoebic abscesses and liver
- It invades the mucosa and submucosa of the large intestine
Morphology:
- Exists in 3 stages:
  - Trophozoite
  - Cyst
  - Pre-cyst
- Features of Trophozoite include pseudopodia, ectoplasm, karyosome, nucleus, and a vacuole containing the REC
Life Cycle:
- Relatively simple
Mode of Infection:
- Not specified
Incubation Period:
- Not specified
Pathogenicity:
- Not specified
Treatment:
- Not specified
Prophylaxis:
- Not specified