I have heard of people passing rubbery things, I have seen these, it could be a build up of fecal matter and may not be a parasite at all. The only way is to identify thru a lab (good luck) or post pics and see if someone can pick up on it. Usually parasites are not going to be rubbery at all, more mushy. If you leave them out without preservative, they will shrivel up and disappear. I had some slides (microscope) that when I revisited 2 days later the parasites were gone, b/c they simply dried up. Ask Shroom about this.