To me it looks like the skin off something you ate? even if it has been stuck and hanging around your intestines for a while?.......Im pretty sure you need a microscope for schistosomiasis??
it also has no covering so it should look like the partially digested goo everyone else is trying to solve too if it was a parasite....??? to look that good, it is either skin or would be plain as day what it is, if it was a parasite...... parasites come out obvious or like mystery mush goo.....