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WAEC Animal Husbandry 2018 Question 20

Question 20

Parasites of Farm Animals

The diagram below shows stages in the life cycle of a parasite.
Which of the following organisms serve as hosts to the parasite at the stages labelled I and II respectively?

Diagram for this question
  1. A.Snail, pig
  2. B.Human, snail
  3. C.Human, pig
  4. D.Pig, Human
Show the answer and explanation

Answer: D (Pig, Human)

Explanation

I is the bladder worm (cysticercus) in the pig's muscle; II is the scolex turned out, ready to attach in the human gut.