Life Cycle of Ribeiroia

Ribeiroia life cycle

So here is one of my final projects finished and out of the way.  Huzzah!  One of the options was to create a story board of some sort of process.  I chose the life cycle of the parasitic trematode, Ribeiroia.  Here are a couple scenes blown up so that they are easier to see:

example scene 1

example scene 2

And because the script is probably too small to read, and some of you might actually be interested in the fascinating and complicated life cycle of Ribeiroia, here is the full script:

Ribeiroia eggs hatch, giving rise to free-swimming, ciliated miracidia.

The miracidia are then eaten by a snail, the Ribeiroia’s first host, where they transform into worm-like redia.

The redia make their way to the snail’s ovotestis, where they feed and reproduce asexually, a process called amplification.

These redia produce more redia as well as thousands of free-swimming cercaria.  The cercarua have a bifurcated esophagus and are not ciliated.

Next, the cercaria infect a tadpole and encyst themselves near the tadpole’s limb buds.

As a result, the tadpole develops irregularly.  As the tadpole becomes a frog, it may have too many legs, or too few.

This makes the frog easy prey for water birds, the primary host for Ribeiroia.

The adult Ribeiroia, called a fluke, attaches itself to the digestive tract.  Here they sexually reproduce.

The eggs exit the primary host, and it all starts again.

One thought on “Life Cycle of Ribeiroia

  1. This reminds me of all the parasite life cycles I studied for Ecological Parasitology, only it’s much easier on the eyes. Excellent work, as always.

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