What are the more important worm infestations? What are their manifestations? What parasitic diseases are acquired from unclean water sources? How do people become infected with pinworms? How do they...

What are the more important worm infestations? What are their manifestations? What parasitic diseases are acquired from unclean water sources?

How do people become infected with pinworms? How do they acquire an Ascaris infection? What is the source of most parasitic disease in the United States?