Old World hookworm includes which species?

Old World hookworm includes which species?

• A. Ancylostoma duodenale
• B. Necator americanus
• C. Ancylostoma caninum
• D. Toxocara canis

Answer: (A)

Old World hookworms are the human intestinal nematodes historically associated with the Old World, with Ancylostoma duodenale standing out as the classic Old World species. This genus includes hookworms that infect humans by penetrating the skin and migrating to the intestines, causing iron-deficiency anemia in many cases. Necator americanus is typically referred to as the New World hookworm, while Ancylostoma caninum is a dog hookworm and Toxocara canis is a roundworm of dogs, not a human hookworm. So, Ancylostoma duodenale fits the category of Old World hookworm.