| Date | 1843 |
| Author | Klencke |
| Contribution | Obtained experimental evidence for the transmission of tuberculosis by cow's milk. |
| Reference | Garrison & Morton |
| Notes | P. F. H. Klencke. Work done in 1843; made no impact. According to Cummins (see entry for Villemin) Koch looked back, unjustifiably, to Klencke rather than Villemin as the pioneer of experimental transmission of tuberculosis. Cummins has grave reservations about Klencke's work. |
| Category | Causation |
| Pathogen Class | General |
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