| Date | 1893 |
| Author | Escherich |
| Contribution | Contributed to the development of a serological test for diphtheria. |
| Reference | Friedmann |
| Notes | Theodor Escherich, with Klemensiewicz, was one of the first to demonstrate antitoxin in serum of recovered diphtheria patients -- a finding that his pupil Schick later used in the development of the Schick intracutaneous test. For Friedmann reference, see Escherich 1885. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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