Roundworms

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Roundworms
By Shawun Green
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About Roundworms

• Roundworms are Parasites or Larva Migrans they
  are common in a number of different animal
  species including dogs and cats.
• Roundworm specific to humans but this parasite is
  rarely found in developed countries.
• Humans can become infected with animal roundworms
  by accidentally ingesting eggs or larvae.
• Most of them are so small that they are not even
  noticed. These parasites are actually fairly
  large, but unseen. These worms are slender,
  round, and have no segments.

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Where do Roundworms Live ?

• Roundworms do not live in the desert.
• Roundworms live all over the world.
• Roundworms live in salt water, fresh water and
  the soil.
• There are lots of tiny roundworms living in soil,
  mud in lakes, ponds, and streams.

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Roundworms body

• The worm will take in it's food by the mouth,
  digest it, and absorb it as it moves in the
  intestine in the hollow space then wastes leave
  through the anus.
• Roundworms are large groups of 12,000 species and
  are small cylindrical worms.
• They have a body wall made up of a covering layer
  and two layers of muscles and inside they are
  hollow.
• The intestine passes through this hollow space,
  as it is a tube with openings at each end, one
  for the mouth and one for the anus.

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How Do Roundworms Reproduce ?

• Roundworms reproduce sexually. Most species of
  roundworms have separate males and females.
• Fertilization takes place inside the body of the
  female. Roundworms that are parasites on animals
  often have complex life cycles.
• Two or three hosts may be involved in the life
  cycle of some roundworms. In other roundworms
  such as the stages of the life cycle take place
  in different organs of one host.
• Roundworms can reproduce up to 25 to 30 eggs.

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Roundworms Life Cycle

• The intestinal roundworm infection in humans
  follows the ingestion of eggs that have
  contaminated foods or soil.
• In the small intestine the larvae through the
  intestinal wall, reaching the lungs, where they
  may produce a host sensitization that results in
  lung inflammation and fluid retention.

• About 10 days later, the larvae pass from the
  respiratory passages into the digestive tract and
  mature into egg-producing worms, which grow to
  some 15 to 40 cm (6 to 16 inches) in length, in
  the small intestine.

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