In the life cycle of Echinococcus granulosus, the oncosphere released from an ingested egg first penetrates the:
Correct answer: A. Intestinal wall of the intermediate host
- A. Intestinal wall of the intermediate host
- B. Tracheal wall of the definitive host
- C. Bile duct of the intermediate host
- D. Skin of the arthropod vector
Explanation
After an intermediate host ingests an egg, the oncosphere hatches in the intestine and penetrates the intestinal mucosa. It then enters the circulation and eventually develops into a hydatid cyst in organs such as the liver or lungs.
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About Veterinary Parasitology
Covers protozoa, helminths and arthropods that infect domestic animals, including their morphology, life cycles, hosts, transmission and clinical effects. Questions connect parasite identification with diagnosis, prevention and treatment, and distinguish endoparasites from ectoparasites and definitive hosts from intermediate hosts.
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