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21. The adult tapeworm of Echinococcus granulosus is found in the intestine of:A. DogsB. SheepC. HumansD. Cattle

Question

21. The adult tapeworm of Echinococcus granulosus is found in the intestine of:

  • A. Dogs
  • B. Sheep
  • C. Humans
  • D. Cattle
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Solution

To address the question regarding the adult tapeworm of Echinococcus granulosus:

Understanding Echinococcus granulosus

Echinococcus granulosus is a type of parasitic tapeworm that primarily affects canines, particularly domestic dogs. It is known for causing hydatid disease in humans and other intermediate hosts.

Common Hosts

  1. Dogs: They are the definitive hosts for Echinococcus granulosus, meaning the tapeworm's adult stage lives in their intestines.
  2. Sheep and Cattle: These animals often serve as intermediate hosts, where the larvae develop into hydatid cysts within their tissues.
  3. Humans: Humans can become accidental hosts, but they do not harbor the adult tapeworm as the definitive hosts do.

Conclusion

Given this information, the correct answer to the question of where the adult tapeworm of Echinococcus granulosus is found is:

A. Dogs.

This answer reflects the biological life cycle of Echinococcus granulosus, highlighting that while various other animals may be involved in its lifecycle, only dogs are the definitive hosts where the adult tapeworm resides.

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