Question:

The active form of Entamoeba histolytica feeds upon

Updated On: Jul 7, 2022
  • food in intestine
  • blood only
  • erythrocytes, mucosa and submucosa of colon
  • mucosa and submucosa of colon only.
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The Correct Option is C

Solution and Explanation

Entamoeba histolytica (Gr., entos : within + amoeba : change + hist os: tissue + lysis: dissolve) is the causative organism of amoebic dysentery or amoebiasis in man. It is a microscopic endoparasite of man. It is commonly found in the upper part of the large intestine (colon) and is very often lodged in the liver, lungs, brain and testes. In its life cycle, it occurs in three distinct forms (i) trophozoite or magna form, (ii) precystic or minuta form, and (iii) cystic form. Trophozoite is the most active, motile and feeding form which is pathogenic to man. It lives in the mucous and submucous layers of the colon and feeds on these layers and erythrocytes.
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Concepts Used:

Common Diseases in Human Beings

Any adverse variation from an organism's normal structural or functional condition is usually associated with specific signs and symptoms and distinct from physical injury.

  • Acute Disease

A few diseases appear out of nowhere and persist only a few days. Acute diseases, such as the common cold, are examples of them. Acute diseases frequently become chronic if they are not treated.

Acute diseases include strep throat, fractured bones, appendicitis, influenza, pneumonia, and others.

  • Symptoms and Treatments

Acute diseases develop quickly and are accompanied by unique symptoms that necessitate immediate or short-term treatment and improve once treated. Acute illnesses, such as the common cold, can sometimes go away on their own.

  • Chronic Diseases

Chronic diseases are illnesses that develop over time and endure for a long time or even a lifetime. Chronic disease is defined as a disease that lasts more than three years. The symptoms are relatively modest at first.