Tapeworm segments (or proglottids) and eggs may be found in the faeces, but I am not sure it is every bowel movement. Tapeworms might need a rest every now and again.

You need a microscope to see the eggs, and a very sharp eye to see the proglottids.

Proglottids are most likely to be noticed (*alert – this detail from Wikipedia is especially for Caroline*) when they “trickle down the thighs”.

http://tiny.cc/TapeWorm

On the contrary, tapeworm segments and eggs are expelled with every bowel movement (and sometimes without). If you meant to say that it was unusual for them to be expelled orally, you would be correct.

I am sure you are correct. I have seen countless children vomit Ascaris lumbricoides, and never once seen a tape worm.

Tape worms attach themselves to the lining of the intestine, so it is unusual for them to be expelled, with or against gravity.