I have never read anything about cacao killing parasites but cacao is naturally bitter so who knows? It looks like tape or perhaps dried out roundworm. A couple years back I did a (what I would now consider weak) parasite cleanse and a small piece of straw/ grass came out in a bowel movement. I never had it analyzed but it looked similar to your pics. Since then I have cleansed and realized I had tape and roundworms. Good luck and keep at it!