Entamoeba Histolytica Characteristics
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Questions and Answers

What is the primary method for diagnosing Entamoeba histolytica infection?

  • Biopsy of abscess and examined by haemagglutination test
  • Stool examination (correct)
  • PCR
  • Serological tests

Which of the following is a common symptom of amebic dysentery caused by Entamoeba histolytica?

  • Frequent, loose stools flecked with blood and mucus (correct)
  • Fever and chills
  • Inflammation of the liver
  • Abdominal pain and constipation

Where do Entamoeba histolytica cysts form?

  • In the lungs
  • In the liver
  • In the blood
  • In the intestinal lumen (correct)

What is the maximum duration that Entamoeba histolytica cysts can survive in a feces-contaminated environment?

<p>1 month (A)</p> Signup and view all the answers

How do humans typically become infected with Entamoeba histolytica?

<p>By drinking contaminated water (D)</p> Signup and view all the answers

What is the characteristic that makes Entamoeba histolytica the only intestinal ameba to exhibit this trait?

<p>Feeding on living host cells (A)</p> Signup and view all the answers

What is the typical size range of the spherical to round cysts of Entamoeba histolytica?

<p>Smaller than the trophozoites (A)</p> Signup and view all the answers

Which of the following is a serious complication of Entamoeba histolytica infection?

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

What is the purpose of the hyaline cyst wall in Entamoeba histolytica cysts?

<p>To provide structure and protection (A)</p> Signup and view all the answers

What is the transformation that occurs in the chromatin material of young Entamoeba histolytica cysts?

<p>It forms squared or round-ended chromatoid bars (D)</p> Signup and view all the answers

What happens to the glycogen mass in Entamoeba histolytica cysts as they mature?

<p>It usually disappears (C)</p> Signup and view all the answers

How many nuclei are typically present in a mature, infective Entamoeba histolytica cyst?

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

What is the method of choice for the recovery of E.coli trophozoites and cysts?

<p>General stool examination (D)</p> Signup and view all the answers

Which characteristic differentiates Trophozoite of E.histolytica from E.coli?

<p>Presence of progressive, finger-like pseudopodia (B)</p> Signup and view all the answers

What does the presence of E.coli in stool samples suggest?

<p>Ingestion of contaminated food or drink (A)</p> Signup and view all the answers

How can a technologist differentiate between pathogenic parasites and nonpathogenic E.coli in stool preparations?

<p>By carefully examining for pathogenic characteristics in addition to E.coli (C)</p> Signup and view all the answers

How many nuclei are typically found in a trophozoite of E.histolytica?

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

What is a characteristic feature of the cytoplasmic inclusion of Trophozoite of E.histolytica?

<p>Coarse and unevenly distributed cytoplasm (A)</p> Signup and view all the answers

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