Which stage of Trichuris trichiura is infective for humans?

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Prepare for Success! In Clinical Laboratory Science with our Parasitology Test. Study with flashcards, multiple choice questions, hints, and explanations. Boost your readiness for the exam!

Multiple Choice

Which stage of Trichuris trichiura is infective for humans?

Explanation:
In this parasite, transmission begins with the environment. The eggs are shed in feces as unembryonated, and they must develop in soil to become embryonated eggs containing the infective larva. Humans ingest these embryonated eggs, and the larva then hatches and proceeds to establish infection in the cecum. The embryonated egg is the infectious form because only after embryonation does the egg gain the ability to initiate infection. Other forms mentioned belong to different organisms or life stages that aren’t responsible for initiating whipworm infection.

In this parasite, transmission begins with the environment. The eggs are shed in feces as unembryonated, and they must develop in soil to become embryonated eggs containing the infective larva. Humans ingest these embryonated eggs, and the larva then hatches and proceeds to establish infection in the cecum. The embryonated egg is the infectious form because only after embryonation does the egg gain the ability to initiate infection. Other forms mentioned belong to different organisms or life stages that aren’t responsible for initiating whipworm infection.

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