Under a microscope, the protozoan's adaptations ... according to the CDC. Hookworms: A good reason not to go barefoot in the summer, at least not when walking through a freshly fertilized field.

In Ecuador, they know what a parasite looks like under a microscope. In the U.S., because hookworm is rare, physicians who won't know what to look for could miss it. Are there unique difficulties ...

When the string is pulled out, it's examined under a microscope to look for parasites ... These are types of hookworms. Hookworms live in the small intestines. Most hookworm infestations don ...

Up to 740 million people worldwide have hookworm infections ... where it develops into an adult and lays eggs, according to the CDC. These eggs are expelled from the body in a person's stool ...