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Balantidium coli: Parasite Characteristics

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Balantidium coli: Parasite Characteristics

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Questions and Answers

What is the diagnostic stage of Balantidium coli?

Trophozoite & Cyst

What is the infective stage of Balantidium coli?

Cyst

What is the drug of choice for treating Balantidium coli?

Tetracycline and metronidazole

What is the morphology of Balantidium coli cysts?

Spherical, surrounded by thick and transparent double layered wall Signup and view all the answers

What are the two non-identical nuclei present in Balantidium coli trophozoites?

A large kidney bean–shaped macronucleus and a small nucleus (micronucleus) Signup and view all the answers

What is the size range of Balantidium coli trophozoites?

30 to 120 μm by 30 to 80 μm Signup and view all the answers

Describe the morphology of Balantidium coli cysts.

Cysts are spherical in shape and surrounded by thick and transparent double layered wall. Signup and view all the answers

What are the symptoms of chronic balantidiasis?

Patients may have diarrhea. Signup and view all the answers

How is the laboratory diagnosis of Balantidium coli performed?

Microscopic examination of feces for trophozoite and cysts is performed, and biopsy may be taken from the large bowel. Signup and view all the answers

What is the infective stage of Balantidium coli and how does it enter the host?

The infective stage is the cyst, which enters the host through contaminated food and water. Signup and view all the answers

Study Notes

Diagnostic Stage

The diagnostic stage of Balantidium coli is the trophozoite stage.

Infective Stage

The infective stage of Balantidium coli is the cyst stage.
The cysts enter the host through contaminated food and water, or direct contact with infected feces.

Treatment

The drug of choice for treating Balantidium coli is tetracycline.

Morphology of Cysts

Balantidium coli cysts are spherical or oval in shape, and range in size from 40-60 μm.
Cysts have a thick, hyaline wall and contain a mass of granules and vacuoles.

Trophozoites

Balantidium coli trophozoites have two non-identical nuclei, a macronucleus and a micronucleus.
Trophozoites are large, ranging in size from 30-150 μm x 20-60 μm.

Symptoms of Chronic Balantidiasis

Symptoms include chronic diarrhea, abdominal pain, and weight loss.

Laboratory Diagnosis

Laboratory diagnosis is performed through microscopic examination of stool or tissue samples.
The presence of trophozoites or cysts in stool samples is diagnostic for Balantidium coli infection.

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Description

Test your knowledge about the characteristics of Balantidium coli, the only pathogenic ciliate and largest protozoan parasite found in the human body. Learn about its morphology, life cycle, and diagnostic stages.