The majority of the parasites
in people's bodies are microscopic. It is easy to mistake partially digested food for parasite
corpses. If the texture of the poop is unusual, and/or it floats, and stinks way beyond belief, it probably contains some dead ones. Sometimes you might even see some pretty unusual stuff, like worms. Sometimes it's just jelly looking stuff. I recommend looking through the photos in the parasite Image Gallery
, as that can help you identify what you see. Of course, you don't have to look if you don't want to.