These worms live in the small intestine which may be that of a bird or mammal such as a dog, cat, or human. Hookworm infection in pregnancy can cause poor growth, premature birth and a low birth weight of the baby. Hookworms in children can cause intellectual and growth problems.
Ancylostoma duodenale and Necator americanus. A.duodenale is the more common type in the Middle East, North Africa, India and (formerly) in southern Europe, while N.americanus is the more common type in the Americas, Sub-Saharan Africa, Southeast Asia, China, and Indonesia
People with hookworm may experience an itchy rash where the larvae penetrate the skin, then fever, coughing, and wheezing or abdominal pain, loss of appetite, and diarrhea.