| Date | 1847 |
| Author | Callender |
| Contribution | Reduced mortality from post-operative infections by instituting hygienic measures. |
| Reference | Waller |
| Notes | Surgeon George Callender of St. Bartholomew's Hospital, London, was a leading advocate of hospital hygiene in the years immediately preceding the Germ Theory revolution. In his hospital, deaths from surgical complications fell from 33% to 10% in the period 1847 to 1867. Such demonstration of the benefits of cleanliness had little impact until the discovery of microbial pathogens provided a convincing rationale. |
| Category | Miscellany |
| Pathogen Class | General |
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