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Question
The infective stage of Ascaris is
The infective stage of Ascaris is
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Solution
The correct option is A Embryonated egg
The first larva is formed 10-14 days after cleavage and is called rhabditiform larva or first larva which is not an infective stage. In another week, it moults to become the second larva, which is capable of infecting the host. Man acquires the infection by directly ingesting Ascaris eggs along with contaminated food or water. The second larva hatches out of the egg in the small intestine and penetrates the intestinal wall to enter the blood stream. This stage is the embryonated egg.
Thus, the correct answer is B.
The first larva is formed 10-14 days after cleavage and is called rhabditiform larva or first larva which is not an infective stage. In another week, it moults to become the second larva, which is capable of infecting the host. Man acquires the infection by directly ingesting Ascaris eggs along with contaminated food or water. The second larva hatches out of the egg in the small intestine and penetrates the intestinal wall to enter the blood stream. This stage is the embryonated egg.
Thus, the correct answer is B.
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