1. The hookworm latches on the walls of the colon with its sharp teeth where it feeds on blood.

2.      The tapeworm is the longest parasite. A mature adult can lay one million eggs per day.

3.      Tapeworm eggs are embedded in the colon.

4.      The roundworm can grow to 20 inches (50 cm) long and lay 200,000 eggs per day.

5.      Pinworms migrate outside the colon during the night to lay their eggs around the anus. This causes the nightly itching of many unsuspecting victims.