Multiple choice

Which of the following sets of protozoans contain only endoparasites?

  1. Paramecium, Trypanosoma, Balantidium

  2. Paramecium, Proterospongia, Balantidium

  3. Giardia, Trypanosoma, Balantidium

  4. Proterospongia, Trypanosoma, Giardia

  5. Paramecium, Proterospongia, Giardia
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C Correct answer
Explanation

Balantidium, Giardia, Trypanosoma: All are internal parasite protozoans. Balantidium is a common intestinal parasite of vertebrates found chiefly in amphibians and mammals. Giardia is found as parasite in the digestive tract of vertebrates. Trypanosoma is an endoparasite, which resides in blood and cerebrospinal fluid of man.

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