Name
the intestinal nematodes. Give the life cycle of
Name the
intestinal nematodes:
[A]Small intestine:
a)
Ascaris
lumbricoides(Commonly known as round worm).
b)
Ankylostoma doudenale.
c)
Necator americanus.
d)
Strongyloides
stercoralis.
e)
Trichinella spiralis.
[B]Caecum and Appendix:
a)
Enterobius
vermicularis(Pin worm).
b)
Trichuris
trichiura(Whip worm).
Life cycle of
hook warm:
[A]Stage-01:Passage of eggs from the infected host through faeces.
[B]Stage-02:Egg→Rhabditi form larva→Moulting of larva for 2 times→Filariform
larva.
[C]Stage-03:Entrance of filariform larva into a new host by penetrating
the skin.
[D]Stage-04:Filariform larva in the subcutaneous tissue→Migrate to
lymphatics or small venules→venous circulation→Rt heart→Pulmonary
capillary→Alveolar space→Migration to bronchi→Trachea→Larynx→Crawl over
epiglottis→Pharynx→Swallowed into small intestine.During this migration 3rd
moulting takes place.
[E]Stage-05:The growing larva settle down into small intestine→4th
moulting→Sexual maturation of larva→Adult worm→Female adult worm lays eggs→The
cycle is repeated.
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