| Date | 1872 |
| Author | Birch-Hirschfeld |
| Contribution | Reported that cocci injected into the bloodstream may be engulfed by leucocytes. |
| Reference | Anon. |
| Notes | This was a precursor of the phagocyte concept that was to gain immense importance in medical bacteriology. Not in Lechevalier. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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