| Date | 1817 |
| Author | Nitzsch |
| Contribution | Saw resemblance between cercariae and trematodes. |
| Reference | Grove |
| Notes | Relevant to spontaneous generation. Grove seems to contradict suggestions that Nitzsch recognized that cercariae were immature flukes. See Bojanus. |
| Category | Miscellany |
| Pathogen Class | Helminths |
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