| 線索 | 病原 |
| Fatty foul diarrhea | Giardia |
| Bloody diarrhea + liver abscess | Entamoeba |
| Ring brain lesion in AIDS | Toxoplasma |
| RBC + fever cycle | Plasmodium |
| Maltese cross | Babesia |
| Steroid hyperinfection | Strongyloides |
| Bladder cancer | Schistosoma haematobium |
| Neurocysticercosis | Taenia solium egg |
回原章:Ch09