Pathology Question #2 - What is the difference between a parasite and a parasitoid?

Does this caterpillar have parasites or parasitoids?Before we get into lots of detail about the caterpillar research we are doing in LA, I want to make sure you know the difference between a parasite and a parasitoid. Come up with as many similarities and differences as you can. Perhaps you may choose to pool your research and send in one class answer. Either way, the differences between the two are really important to understand so start researching and brainstorming!


8 Comments:
A parasitoid usually spends a large portion of its life living in or on its host and eventually kills the host. Where as a a parisite does not kill its host because it is needed for its own survival.
MacKenzie L.
A parasite is an organism that cannot complete its lifecycle without a host and lives in its host's body and takes nutrients from it. A parasitoid is an organism that lives in a host during its larval stage, then kills the host and is free living as an adult.
Addition: the catapillers have parasitoids, since the things attached to them are eggs, which is a common way for parasitoids to act (they lay their eggs on catapillers which then hatch and burrow into the host).
A parasite is an organism that lives off another organism, which can either be harmless or deadly. Viruses are also known as parasites. A parasitoid is much like a parasite, because it lives off a host for most of its life. Unlike a parasite, the parasitoid ultimately kills or consumes the host it is living off, whereas a parasite will either be harmless to their host, or they will kill it.
A parasitoid is an organism that lives at the expense of its host, impedes its growth and eventually kills it. A parasite is an organism that lives in or on a host, taking nourishment, and reproducing. A parasite usually does not kill its host.
-Eric Kuhn
From Shauna: The difference is that when a parasitoid is only dependent on the host during the larvae stage of its life, and unlike a parasite it can live its adult life without depending on a host. Its also more likely to kill the host.
A parasite is an organism that lives in or on another organism. It also takes its nourishment from this organism. A parasite cannot live on its own. A parasitoid is usually of a various insect whose larvae are parasites that eventually kill their hosts.
I think the caterpillar has parasitoids..
-Lexi
A parasite is an organism that lives on or inside another organism of the host organism.
A parasitoid is an organism that spends a significant portion of its life attached to or within a single host organism which it ultimately kills or consumes in the process.
Parasites and parasitoids are similar, except that parasites generally draw nutrients from the host without damaging it or killing it.
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