Difference between revisions of "Ascaridoidea"

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== General Appearance ==
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*Non-bursate.
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*Big fleshy worms; typically 5-40cm long (depending on age, sex and species).
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*Three lips around the mouth.
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*A single-bulbed pharynx.
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== General Life-Cycle ==
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*Adult females in small intestine lay eggs.
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*Eggs have a thick protective shell.
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*Some also have a sticky outer albuminoid coat.
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*Eggs passed in faeces.
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*L1 → infective L2 inside the egg.
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*Infection is by ingestion of the embryonated egg (egg in which a larva has formed).
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*Eggs can remain viable in humid environment for up to 5years.
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 +
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[[Ascaridida]]
 
[[Ascaridida]]

Revision as of 13:01, 23 December 2008



Infectious agents and parasitesWikiBugs Banner.png
PARASITES
NEMATODES



General Appearance

  • Non-bursate.
  • Big fleshy worms; typically 5-40cm long (depending on age, sex and species).
  • Three lips around the mouth.
  • A single-bulbed pharynx.


General Life-Cycle

  • Adult females in small intestine lay eggs.
  • Eggs have a thick protective shell.
  • Some also have a sticky outer albuminoid coat.
  • Eggs passed in faeces.
  • L1 → infective L2 inside the egg.
  • Infection is by ingestion of the embryonated egg (egg in which a larva has formed).
  • Eggs can remain viable in humid environment for up to 5years.




Ascaridida

Occlusion of pancreatic ducts sometimes happens Pancreas - parasitic

In Peritoneal Cavity Parasitic - Pathology