Dictionary > Ancylostoma duodenale

Ancylostoma duodenale

Definition
noun
A hookworm species of humans and regarded as the old world hookworm of man
Supplement
Ancylostoma duodenale is a hookworm species belonging to the family Ancylostomatidae. It is a nematode, which is characterized by having an earthworm-like form but not segmented. It is whitish in color. The species is a parasite of humans. Its typical site of infection is the intestinal wall. It has distinctive two pairs of teeth (or ventral plates) on its buccal cavity that it uses to attach to the wall of the intestine. It feeds on blood and therefore may cause iron deficiency anaemia to its host. Infestation with Ancylostoma spp. is referred to as ancylostomiasis.
The males are 8mm to 11 mm in length whereas the females are 10mm to 13mm long. The males have a copulatory bursa and needle-like spicules with tiny tips whereas the females have a vulva at the posterior end. The infective stage is the larval phase. The larva penetrates the exposed skin and finds its way to the bloodstream to be carried to the lungs. It then breaks into the alveoli to reach the bronchi and trachea where it would be swallowed to reach the small intestine.
This species is widespread in temperate areas, in contrast to the more tropical distribution of the new world hookworm, Necator americanus. It is the only hookworm found in the U.S. It is also abundant in Europe, north Africa, India, China, and southeast Asia.
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Nematoda
  • Class: Secernentea
  • Order: Strongylida
  • Family: Ancylostomatidae
  • Genus: Ancylostoma
  • Species: A. duodenale

See also:

  • hookworm
  • ancylostoma
  • ancylostomiasis
  • ancylostoma dermatitis


  • You will also like...

    Freshwater aquatic plankton
    Freshwater Communities & Plankton

    Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

    Kidneys
    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

    Darwin's Finches - Natural Selection
    Darwin and Natural Selection

    This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

    Selective Breeding
    Selective Breeding

    Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

    genes controlling growth and development
    Control of Growth & Development

    Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..

    New Zealand Flora & Fauna
    Ecology & Biodiversity: New Zealand Flora & Fauna

    New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

    Related Articles...

    No related articles found

    See all Related Topics