Ancylostoma

Hookworm is a parasitic worm (nematode) that lives in the small intestine host, humans. There are two species of hookworms commonly infect humans, Ancylostoma duodenale and Necator americanus. Necator americanus is found in America, Sub-Saharan Africa, Southeast Asia, China, and Indonesia, while A. duodenale more in the Middle East, North Africa, India, and southern Europe. About a quarter of the world's population is infected by hookworm. Infection is most often found in areas with warm and humid, with poor levels of cleanliness. The infective form of the worm is a form of filariform. Once the worms are hatched from eggs, larvae emerge rhabditiform which will then develop into larvae filarifor.