🦠microbiology review

Ascariasis

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Ascariasis is an intestinal infection caused by the parasitic roundworm Ascaris lumbricoides. It primarily affects the gastrointestinal tract and can lead to malnutrition and other complications.

5 Must Know Facts For Your Next Test

  1. Ascariasis is transmitted through ingestion of Ascaris eggs from contaminated food, water, or soil.
  2. Symptoms can include abdominal pain, diarrhea, and in severe cases, intestinal blockage.
  3. Ascaris larvae migrate through the lungs before maturing in the intestines, causing respiratory symptoms such as coughing.
  4. Diagnosis is typically made by identifying Ascaris eggs in stool samples using microscopic examination.
  5. Effective treatment involves antihelminthic medications like albendazole or mebendazole.

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