- ???????? Ascaris lumbricoides

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- ???????? Ascaris lumbricoides
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Ascaris lumbricoides It is a soil transmitted par
asite
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Ascaris lumbricoides infected people with
associated morbidity 250 million,
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Field studies demonstrate that 70 of the Ascaris
lumbricoides infestations occur in 15-30 of
the people.
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Annual mortality 60,000 from complications as
ascaris migration , intestinal obstruction
malnutrition, anaemia and growth retardation as
well as higher susceptibility to other infections.
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• Infections are associated with
• Poverty and poor living conditions
• Inadequate sanitation and water
• supplies
• Soil quality and climate
• Poor personal and environmental
• hygiene Poor health awareness

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Ascariasis. Large adult worms of Ascaris
lumbricoides.
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Ascariasis. Section of lung showing very heavy
infection with larvae of A. lumbricoides.
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Ascariasis. Higher magnification showing detail
of larva and surrounding inflammatory reaction.
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Bolus of ascaris worms in the gut causing
intestinal obstruction.
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Ascaris mature ova
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Ascariasis. Unfertilized egg of A. lumbricoides
in faeces showing pronounced ellipsoidal
shape(Barrel) and indistinct internal structure.
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This type of egg may be seen in patients
harbouring only female worms and they are
occasionally mistaken for vegetable cells.
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Ascariasis. Fertilized egg of A. lumbricoides in
faeces showing more rounded shape and corticated
outer shell.
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Ascariasis. Embryonated egg of A. lumbricoides
containing more mature embryo and showing less
pronounced cortication of outer shell.
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Ascariasis. Barium study of small bowel in a
patient with ascariasis. The intestinal tract of
one of the adult worms is also well-outlined with
barium which it has ingested.
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Barium study showing ascaris in the small
intestine.
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Ascariasis. A single A. lumbricoides is visible
within the common bile duct.
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Contrast material can also be seen in the
alimentary tract of the worm, which was
subsequently removed by sphincterotomy.
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ERCP showing an ascaris worm in the common bile
duct of a young African patient presenting with
acute pancreatitis and cholangitis.
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Ascaris female
(transverse section) 2 ovaries 2 uteri
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Ascaris male T.S
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Fertilized eggs where embryos have begun to
develop (this happens when the stool sample is
not processed for several days without
refrigeration). .
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  The embryos in early stage of division (4-6
cells) can be clearly seen.  Note that the egg on
the left has a very thin mammillated outer layer.
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Egg containing a larva, which will be infective
if ingested With foods. This happens after 2
weeks in soil
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Larva hatching from an egg in the dudenum
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An adult Ascaris worm.  Tapered ends length 15
to 35 cm (the females tend to be the larger
ones). 
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This worm is a female, as evidenced by the size
and genital girdle (the dark circular groove at
bottom area of image)
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Treatment
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Four drugs are recommended for treatment
albendazole 400 mg single dose levamisole 2.5
mg/kg mebendazole 500 mg pyrantel 10 mg/kg
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A single dose orally for treatment can be given
to pregnant and lactating women, but, as a
general rule, drugs should not be given in the
first trimester of pregnancy.