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18 Questions

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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?

1 month Signup and view all the answers

How do humans typically become infected with Entamoeba histolytica?

By drinking contaminated water Signup and view all the answers

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

Feeding on living host cells Signup and view all the answers

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

Smaller than the trophozoites Signup and view all the answers

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

Amebic abscess Signup and view all the answers

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

To provide structure and protection Signup and view all the answers

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

It forms squared or round-ended chromatoid bars Signup and view all the answers

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

It usually disappears Signup and view all the answers

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

Four Signup and view all the answers

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

General stool examination Signup and view all the answers

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

Presence of progressive, finger-like pseudopodia Signup and view all the answers

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

Ingestion of contaminated food or drink Signup and view all the answers

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

By carefully examining for pathogenic characteristics in addition to E.coli Signup and view all the answers

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

One Signup and view all the answers

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

Coarse and unevenly distributed cytoplasm Signup and view all the answers