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angiostrongyliasis

angiostrongyliasis

introduction

  • Angiostrongyliasis is the most common cause of eosinophilic meningitis in SE Asia and Pacific Basin.
  • it is caused by Angiostrongylus cantonensis, a nematode (roundworm) parasite which resides in pulmonary arteries of rats.
  • primary intermediate host are snails
  • humans are incidental hosts and become infected through eating raw or undercooked infected snails or other vectors, or contaminated water or vegetables.
  • the larva migrate to CNS where they cause eosinophilic meningitis

other species of Angiostrongylus

  • Angiostrongylus vasorum is mainly in western Europe but also found in most parts of the world
    • natural definitive hosts include domestic dogs and foxes
      • resides in right ventricle and the pulmonary artery hence “heart worm”
    • natural paratenic hosts can be frogs, lizards, mice, rats.
    • natural intermediate hosts are land slugs, land snails and freshwater snails
  • Angiostrongylus costaricensis
angiostrongyliasis.txt · Last modified: 2012/01/09 10:10 (external edit)