Ascaris lumbricoides Parasite Overview

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Questions and Answers

Where do mature Ascaris eggs usually mature?

  • In the liver
  • In the intestines
  • In the lungs
  • In the soil (correct)

How do Ascaris eggs become infectious?

  • After being coughed up
  • After being expelled in feces
  • After coming in contact with egg-contaminated soil (correct)
  • After entering the circulatory system

Where do larval Ascaris worms enter after being ingested?

  • Lungs
  • Appendix
  • Liver
  • Intestine (correct)

How do adult Ascaris worms enter the bile or pancreatic ducts?

<p>By burrowing through the intestine (C)</p>
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What can happen if a large mass of mature worms blocks the lumen of the small intestine?

<p>Completely block the lumen of the small intestine (B)</p>
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How do mature Ascaris worms usually exit the body to potentially be coughed up?

<p>Through coughing up from the lungs (B)</p>
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What is a potential consequence of intestinal blood loss due to worm ingestion?

<p>Iron deficiency anemia (D)</p>
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How is Strongyloidiasis infection similar to hookworm infection?

<p>Both enter the body through intact skin (B)</p>
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Why is Trichinella spiralis infection considered uncommon in the United States today?

<p>It is mainly related to ingestion of undercooked wild game (B)</p>
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What happens to Trichinella larvae after they are ingested from infected meat?

<p>They develop into mature worms in the muscles (B)</p>
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What causes the severe systemic symptoms during the phase of larval migration of Trichinella infection?

<p>Inflammatory reaction to the worms in tissues (D)</p>
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Which condition may result from Trichinella spiralis infection if left untreated?

<p>Heart problems (D)</p>
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How is an Ascaris infection identified?

<p>By detecting worm eggs in fecal material (A)</p>
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What is a common way children get infected with animal worms?

<p>Transfer of eggs through contaminated hands, toys, or objects (B)</p>
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Where do pinworms generally take up residence?

<p>Duodenum and ileocecal region (B)</p>
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Which statement about hookworm infection is true?

<p>Larvae enter the body through skin contact with contaminated soil (A)</p>
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What is a symptom commonly associated with pinworm infections?

<p>Intense anal and perianal itching (D)</p>
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How do whipworms (Trichuriasis) typically infect humans?

<p>Via ingestion of eggs in fecally contaminated soil (A)</p>
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What is a characteristic of adult hookworms in the small intestine?

<p>They have a specialized attachment organ called the buccal plate (C)</p>
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How are pinworm infections commonly spread among family members?

<p>From contaminated bedclothes or other objects (B)</p>
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Flashcards

Where do Ascaris eggs mature?

In the soil.

How do Ascaris eggs become infectious?

After coming in contact with egg-contaminated soil.

Where do larval Ascaris worms enter after being ingested?

Intestine.

How do adult Ascaris worms enter the bile or pancreatic ducts?

By burrowing through the intestine walls.

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What can happen if a large mass of mature worms blocks the small intestine?

Completely block the lumen of the small intestine.

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How do mature Ascaris worms usually exit the body?

Through coughing up from the lungs.

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Hookworm infection

Larvae enter the body through skin contact with contaminated soil.

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Consequence of intestinal blood loss from worms?

Iron deficiency anemia.

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Why is Trichinella spiralis uncommon in the US?

It is mainly related to ingestion of undercooked wild game.

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What happens to Trichinella larvae after being ingested?

They develop into mature worms in the muscles.

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What causes severe systemic symptoms during larval migration of Trichinella?

Inflammatory reaction to the worms in tissues.

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Untreated Trichinella spiralis infection may result in?

Heart problems.

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How is an Ascaris infection identified?

By detecting worm eggs in fecal material.

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How do children get infected with animal worms?

Transfer of eggs through contaminated hands, toys, or objects.

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Where do pinworms generally take up residence?

Duodenum and ileocecal region.

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Symptom of pinworm infections?

Intense anal and perianal itching.

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How do whipworms infect humans?

Via ingestion of eggs in fecally contaminated soil.

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Characteristic of Hookworms?

They have a specialized attachment organ called the buccal plate.

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How are pinworm infections spread among family members?

From contaminated bedclothes or other objects.

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