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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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[[Ascaridida]]
 
[[Ascaridida]]
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