| Date | 1888 | 
| Author | Roux | 
| Contribution | With Yersin, reported that the Klebs-Loeffler bacillus of diphtheria produced a toxin. | 
| Reference | Silverstein | 
| Notes | As suspected by Loeffler. | 
| Category | Immunology | 
| Pathogen Class | Bacteria | 
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