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...

    Cells in different stages of meiosis
    Meiosis – The Genetics of Reproduction

    Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

    Consciousness and behavior
    Consciousness and Behavior

    Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Early Mammals on Earth
    Early Mammals on Earth

    The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

    Non-Mendelian Inheritance
    Non-Mendelian Inheritance

    In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

    An artistic depiction of Dunkleosteus fish
    Fish

    The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

    Related Articles...

    No related articles found

    See all Related Topics