<unk>  is a species of the roundworm genus<unk> . It is a parasitic nematode worm and commonly known as the Old World hookworm. It lives in the small intestine of hosts such as humans, cats and dogs, where it is able to mate and mature.<unk>  and Necator americanus are the two human hookworm species that are normally discussed together as the cause of hookworm infection. They are dioecious.<unk>  is abundant throughout the world, including Southern Europe, North Africa, India, China, southeast Asia, some areas in the United States, the Caribbean, and South America.
Ancylostoma duodenale
Echinostoma cinetorchis
Taenia asiatica
Taenia solium
Echinostoma revolutum
Schistosoma mansoni
Haplorchis taichui
Trichuris trichiura