The roundworms found in the feces, roundworms will all die, the reason for this appearance is because the roundworm has a certain survival period, when it is old or is physically exhausted, it will not be able to adsorb in the intestine, so that it will be excreted. The roundworms that are young and strong as well as vigorous will live in the intestines and will not be discharged with the peristalsis of the intestines, so the roundworms that are discharged are the older ones. In addition, if you take the worming medicine, the roundworm in the stomach will also die, or his vitality is reduced, this way to be able to discharge. So, the reason why the roundworm comes out and dies is because the roundworm it is not able to have a good parasitic stamina there, so it will be discharged. If the roundworm is put into the environment outside the body alone, even if it has better physical strength, the environment outside the body is not suitable for it to survive, and it will soon die.