Nematode principles

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etymology

• Greek nemato- means "thread"

特徴

• linear and slender form
• 2mm to 1m
• GI organ from mouth to anus
• gonochorism

parasitism

• intestinal nematode - GI tract
  • human final host
• parenchymatous nematode - parenchymal tissue
  • human final host
• larva migrans
  • human NO final host
  • cannot diagnose by ova
  • cutaneous larva migrans, visceral larva migrans
    • あくまで迷入なので，あるlarvaが特定の臓器だけを選択するという理屈がある訳ではない．よってlarva るmigransが必ずskinだけで起きるという保証はないが，虫ごとにpreferenseはある

large classification

	Enterobius vermicularis Trichris trichiuria	Ascaris lumbricoides Toxocara spp.	Ancylostoma duodenale Necator americanus Strongyloides stercoralis
soil
skin
mouth
stomach
circulation via lung to esophagus
intestine
stool