🦠microbiology review

Oriental lung fluke

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

Definition

The oriental lung fluke, Paragonimus westermani, is a parasitic helminth that primarily infects the lungs of its host, causing paragonimiasis. It is commonly transmitted through the consumption of undercooked or raw freshwater crustaceans.

5 Must Know Facts For Your Next Test

  1. Paragonimus westermani has a complex life cycle involving multiple hosts, including snails and freshwater crustaceans.
  2. Humans become infected by ingesting larvae in undercooked or raw shellfish such as crabs and crayfish.
  3. Symptoms of paragonimiasis include chronic cough, chest pain, and hemoptysis (coughing up blood).
  4. Diagnosis often involves identifying eggs in sputum or stool samples.
  5. Treatment typically includes antiparasitic medications like praziquantel.
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