They can live for 20 - 25 years before they die. You should notice white sesame seed looking things (eggs) and sometimes things that look like corn (egg filled sac) in your bowel. Even if you dont then it could be Ascaris (roundworm). And yes I understand alot of people do come in this forum trying to sell stuff and I promise thats not me. I remember writing this dr who sold this mouthwash stuff and i told him what i was going through and he told me that he knew exactly what my problem was and that his mouthwash would fix it, boy was I pissed when I spent $50 for something that would of cost $5 at walmart and didnt even work. And look at all my posts above of people who have been cured after a parasite fast, it works!