Years ago I worked in a small lab. One of the Drs treated a woman for beef tapeworms. I received the stool sample in a bed pan and it had a whole large tapeworm. This person liked to eat raw mwat and this was her 2nd infestation.
I use herbs/supplements and after 5 weeks of quassia tea expelled a mass of tapeworms, flukes, and other worms after a Gall Bladder/Liver flush. Purging will probably bring the larger parasites out whole with little damage to their structure.
On the parasite Support Forum Lorical Lady has a link to a Cayenne Challange which will show Tapeworm segments (white rice) in the stool. A whole Ascaris worm sometimes is expelled without any treatment. A friend passed an Ascaris several years after working in Africa.