Parasitologists know about more than 100 types of human parasitic worms. Unfortunately, most doctors remember little about no more than 15 of them! Pinworms familiar to many live for about a month, lay eggs and die in a few hours. Roundworms live for about 1 year, they can lay eggs and die. This creates the misconception that worms are not for long. However, all other types of worms can live and damage the organs of patients for years, decades! They can live not only in the intestines, but also in all other organs (cranial cavity, eyes, paranasal cavities, thyroid gland, mammary glands, heart, blood, walls of arteries, veins, lymph nodes, tonsils, lungs, liver, gallbladder, pancreas, kidneys, uterus, ovaries, prostate, muscles and even bone).