I've passed strings of tiny balls and clusters of candida balls but no filaments or mucelia so searched for 'candida strings' and yes people do pass them in feces, urine, saliva and they can be quite long. Look at the diagnstic saliva test. There are also other fungi that might look like this and filamentous bacteria.
I searched for filamentous bacteria bile' and found some interesting information. Also search for 'fungi bile'