1. Adult nematodes found in the Lungs of pigs ........ Metastrongylus sp.
2. Adult nematodes NOT found in the Lungs of pigs .......... Go to: 3 & 4

3. Adult nematodes found in or near the Kidney of pigs ........ Stephanuris dentatus
4. Adult nematodes NOT found in the Kidney of pigs ........ Go to: 5 & 6

5. Adult nematodes found in the Small Intestine of pigs ........ Go to: 7 & 8
6. Adult nematodes found in the Cecum and Large Intestine of pigs ........ Go to: 9 & 10

7. Adult nematodes are very small, less than 0.5 inches (1.0 cm) long ........ Strongyloides ransomi
8. Adult nematodes are very large, more than 3 inches (7.5 cm) long ........ Ascaris suum

9. Adult nematodes are long and whip-like, with a small anterior and a thicker posterior ........ Trichuris suis
10. Adult nematodes are rather short, straight, evenly thick and NOT whip-like .......... Oesophagostomum dentatum