Since the scientist is observing a worm that was found inside a host, and worms are not parasites, nor do they need a host to live. On the contrary, earthworms require living in a moist soil that has organic matter. Earthworms starting the organic particles found in the earth that swallows and then expels them forming a pile of excrement. Earthworms are hermaphroditic, and lay their eggs in moist soil.
