I personally sometimes have poop that looks exactly like this, but I'm pretty sure that I don't have candida, as I mentioned in another comment. Also I don't have any parasites either so I know its not that.
I have had a number of tests for candida including blood tests which were negative.
So it seems that other things can cause it. I think that it might be strings of thick mucous mixed with dead skin cells that have been sloughed off the intestinal lining. If you have some kind of dysbiosis then the body will probably be producing excess mucous to try to protect its gut lining, kind of like having a cold in the nose. This results in excessive mucous in the stool.
I'd look at getting a stool test and look for dysbiosis that way and actually test for candida with a blood test or from the yeast culture test that they do in a comprehensive stool test.