• Sometimes lung passage of larvae, adults in intestine.
• Transmission faeco-oral or transcutaneous

     b. Larval tissue nematodes: various species.

• Trichinella larvae in muscles and heart, transmission via meat.
• Toxocara larvae in various organs (visceral larva migrans)

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• Tapeworms: hermaphrodite adults in the intestine or larvae in the tissues

• Transmission of Taenia faeco-oral or via meat with bladder worm disease

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• Flukes: most are hermaphrodite, except blood flukes

- In blood vessels, the intestine, biliary tract, lungs

- Transmission via food (zoonoses) or transcutaneous (schistosomes)

- First intermediate host always a freshwater snail