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Ancylostoma duodenale is a species of the roundworm genus Ancylostoma. It is a parasitic nematode worm and commonly known as the Old World hookworm. It lives in the small intestine especially the jejunum [ citation needed ] of definitive hosts, generally humans, [ 2 ] : 307–308 [ 3 ] where it is able to mate and mature.
Cutaneous larva migrans (abbreviated CLM) is a skin disease in humans, caused by the larvae of various nematode parasites of the hookworm family (Ancylostomatidae).The parasites live in the intestines of dogs, cats, and wild animals; they should not be confused with other members of the hookworm family for which humans are definitive hosts, namely Ancylostoma duodenale and Necator americanus.
N. americanus is generally smaller than A. duodenale with males usually 5 to 9 mm long and females about 1 cm long. Whereas A. duodenale possesses two pairs of teeth, N. americanus possesses a pair of cutting plates in the buccal capsule. Additionally, the hook shape is much more defined in Necator than in Ancylostoma. [11]
The hookworms, Necator americanus and Ancylostoma duodenale, hatch as first-stage juveniles within the soil and develop to an infective third-stage juvenile.Infection occurs by direct penetration through the skin of the host.
The two most common types of hookworm that infect humans are Ancylostoma duodenale and Necator americanus. [citation needed] Hookworm species that are known to infect domestic cats are Ancylostoma braziliense and Ancylostoma tubaeforme. Wild cats are infected by Ancylostoma pluridentatum. [3]
Ancylostoma is a genus of nematodes that includes some species of hookworms. Species include: Ancylostoma braziliense, commonly infects cats, popularly known in Brazil as bicho-geográfico Ancylostoma caninum, commonly infects dogs Ancylostoma ceylanicum Ancylostoma duodenale Ancylostoma pluridentatum, commonly infects sylvatic cats
Signs and symptoms of Ancylostoma duodenale and Necator americanus are given in corresponding page. [ citation needed ] In Ancylostoma braziliensis as the larvae are in an abnormal host, they do not mature to adults but instead migrate through the skin until killed by the host's inflammatory response.
Like many other worms, the female worm is larger than the male. Also, the females are more difficult to distinguish because the teeth sizes appear very similar among the various species of Ancylostoma. Male worms, however, have two broad lateral lobes and a smaller dorsal lobe with rays on the copulatory bursa.