Published in Law and Health Weekly, January 8th, 2005
Helminths, such as roundworms and threadworms, are rare in developed countries, where rates of Crohn disease are high. But in developing countries where corresponding rates of the disease are low, many people carry these parasitic worms.
Their eggs contaminate food, water, air, feces, pets and wild animals. And they are also found on toilet seats and door handles. Once inside the body, the eggs usually lodge in the bowel, where they hatch into worms.
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