Tough to tell, I have never heard of this. Some of my thoughts (guesses):
1/ They do not resemble any worm associated thing I am aware of.
2/ I do not think they are protozoa or bacteria related.
3/ Tapes have visible seed-like objects found in the stool which are the eggs. These do not look like seeds.
Possibly some yeast or fungal strain, but the casing does not fit this unless this is an immune type of reaction. I have seen pics of a gelatin type show up in stools. This shows up in a golden like color. Perhaps the interior is some type of fungal/yeast and the outer casing is the immune system response?