The most commonly noticed parasites in are roundworms, hookworms, threadworms and tape-worms. Roundworms are giant intestinal parasites measuring 15 to 25 cms. in length. They are off-white in color and are most frequently infect children. Eggs produced by them are passed in stools. Roundworm eggs may remain alive in the soil for many months.
Hookworms are small worms measuring one cm.
They attach themselves to the walls of intestines within the bowel. They cause serious bleeding, and poison the patient as well. Pinworms are small white worms about 6.35 cm. in length. Threadworms are small thread-like creatures which can be noticed in the stools of children. The female worm, one cm.