Who sequentially infects a snail, a frog, and a bird to complete the life cycle? Detailed answer

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Who sequentially infects a snail, a frog, and a bird to complete the life cycle? Detailed answer

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Who successively infects a snail, a frog, and a bird to complete the life cycle?

Parasitic flatworms of the genus Ribeiroia begin their lives inside snails, where they develop to the second stage, leave the body and try to infect fish or frogs. Invading tadpoles, the parasite produces special substances that affect the growth of limbs, which is why adult amphibians grow with a set of additional legs. This reduces their speed and endurance, making them easier prey for the parasite's final host, a bird or mammal. In their intestines, Ribeiroia produces eggs, which, along with the droppings, can be eaten again by the snail.

Authors: Jimmy Wales, Larry Sanger

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