| Date | 1837 |
| Author | Schwann |
| Contribution | The development of microorganisms in sterile organic matter can be prevented by heating incoming air. |
| Reference | Anon. |
| Notes | This was a contribution to the long Spontaneous Generation controversy that was separate from, but relevant to, the Germ Theory. |
| Category | Miscellany |
| Pathogen Class | General |
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