Infections blamed on bad air
As a young surgeon training at University College Hospital in the early 1850s, Joseph Lister saw first-hand how often wounds became fatally infected after surgery. Serving under John Eric Erichsen in 1851, he witnessed an outbreak of the skin infection erysipelas that killed four patients within days, a result Erichsen attributed to miasma, the then-common belief that disease arose from bad air circulating through hospital wards. Lister was not satisfied with that explanation and began to suspect that something in the wound itself, rather than the surrounding air, was responsible for the infections he kept seeing.
A theory borrowed from fermentation
The idea that gave Lister’s suspicion a concrete mechanism came from outside surgery entirely: Louis Pasteur’s work showing that fermentation and putrefaction were caused by living microorganisms rather than by some inherent property of the decaying material itself. Lister reasoned that if microorganisms could cause organic matter to ferment and rot, similar organisms might be responsible for the putrefaction that so often set into surgical wounds, and that killing those organisms directly, rather than simply keeping the surrounding hospital air clean, ought to prevent the infections that were killing so many of his patients after otherwise successful operations.
Carbolic acid on instruments, hands and wounds
Beginning in 1865 at Glasgow Royal Infirmary, Lister put that reasoning into practice using carbolic acid, a coal-tar derivative already in use for treating sewage, applying it systematically to surgical instruments, patients’ skin, sutures, surgeons’ hands and hospital wards, rather than to any single one of these in isolation. Over the following two years he refined the method through treating compound fractures and abscesses, developing improved dressing techniques and, by 1867 to 1869, introducing carbolic-treated catgut for internal ligatures, building antisepsis into a comprehensive surgical practice rather than a single added step.
A published method, and years of resistance
Lister set out the full method in his 1867 publication, The Antiseptic Principle of the Practice of Surgery, explicitly connecting his surgical results to Pasteur’s germ theory. The medical establishment did not accept it readily; prominent critics, including the obstetrician James Young Simpson, attacked the approach in the years that followed, and acceptance in Britain lagged well behind acceptance abroad, particularly in Germany, where the method spread more readily through the 1870s. The resistance reflected how deeply the miasma explanation for infection had been embedded in medical thinking, an assumption Lister’s approach directly contradicted rather than merely supplemented.
From killing germs to keeping them out
Lister’s own practice continued to evolve well beyond his initial carbolic acid method: during his later Edinburgh and London appointments he moved toward what became known as aseptic technique, aiming to keep germs out of a wound altogether through sterilised equipment and protective coverings rather than relying solely on chemically killing organisms already present. That shift from antisepsis toward asepsis reflected a broader trend across surgery, as prevention of contamination in the first place came to be seen as more reliable than treating a wound after it had already been exposed.
Why this fight for acceptance still matters
This history is worth understanding because it shows how much resistance a correct and demonstrably effective idea can face when it contradicts an established explanation that practitioners have organised their entire practice around. Lister did not simply announce a discovery and watch it get adopted; he spent years applying, refining, publishing and defending a method against prominent critics, with international acceptance arriving unevenly, ahead of schedule in some countries and behind it in his own. An hour spent on that slower, contested history gives a more realistic picture of how medical practice actually changes than the version in which a good idea, once demonstrated, simply wins.