answered May 12, 2010 at 02:18PM
There are various worms that can live in the large intestine, including tapeworms, roundworms and threadworms.
Some patients will pass these in their stool, others may have few symptoms of worm carriage.
Eating the shells of nuts or seeds is unlikely to cure worms, so if someone thinks they have a worm they should see a doctor (or in some countries a pharmacist). There are several medicines that will kill worms, allowing them to be passed in the stool.