Option 11: Medicine in Britain, c1250–present and The British sector of the Western Front, 1914–18: injuries, treatment and the trenches Revision Notes

Impact of Germ Theory (c1900-present)

The confirmation of Germ Theory before 1900 had profound consequences. It shifted medical focus from miasma and spontaneous generation to specific microorganisms. This understanding was crucial for developing vaccines (e.g., against diphtheria and tuberculosis), improving sanitation (e.g., clean water, waste disposal), and antiseptic surgery, significantly reducing disease incidence and mortality. Identifying specific pathogens allowed for targeted treatments rather than generic remedies.

Genetic and Lifestyle Factors

The discovery of DNA's structure in 1953 opened the door to understanding genetic diseases like cystic fibrosis and sickle cell anemia. This led to genetic screening and counselling. Concurrently, increasing awareness of lifestyle factors – such as diet, exercise, smoking, and alcohol consumption – became central to understanding conditions like heart disease, type 2 diabetes, and various cancers. Public health campaigns increasingly focused on preventative measures based on these factors.

Advances in Diagnosis and Treatment

Technological advancements played a key role. Imaging like X-rays, MRI, and CT scans allowed better internal diagnosis. The development of antibiotics, starting with penicillin in the 1940s, revolutionised treatment for bacterial infections. Later, antiviral drugs emerged for conditions like HIV. This era also saw increased specialisation in medicine, with experts focusing on specific organ systems or disease types, further refining understanding and treatment of disease.

Religious and Supernatural Beliefs

In medieval England, many believed disease was a punishment from God for sins or a test of faith. Supernatural causes like demonic possession or witchcraft were also considered. Processions, prayers, and visits to holy sites were common responses. The Black Death, for example, was often seen as divine wrath, leading to widespread penitence.

Classical Theories: Four Humours and Miasma

The dominant medical theory was the Four Humours (blood, phlegm, black bile, yellow bile), inherited from Hippocrates and Galen. Illness was thought to be caused by an imbalance, leading to treatments like bloodletting or purging. Another significant idea was miasma, the belief that bad air or foul smells caused disease. This led to some early, albeit limited, sanitation efforts, such as removing waste from streets.

Astrology

Astrology played a role in medieval medicine. It was believed that the alignment of planets and stars influenced health. Physicians often consulted astrological charts to determine the best time for treatment, surgery, or administering medicines. Specific star constellations were associated with different parts of the body.

Limited Understanding of Contagion

While there was some limited observation that diseases could spread, a full understanding of germ theory was centuries away. The concept of miasma approached the idea of airborne transmission, but without understanding microorganisms, effective quarantine or hygiene measures were often based on superstition or general cleanliness rather than germ prevention.

Pre-Antiseptic Surgery Conditions

Before the late 19th century, surgical environments were highly unsanitary. Surgeons had little understanding of microbial infection. Operations were often performed in dirty theatres, and surgeons frequently wore unwashed coats, carrying infection from one patient to the next. Instruments were not sterilised, and wounds were left open, increasing the risk of fatal infections like gangrene and sepsis. Despite the introduction of anaesthesia in the 1840s making surgery less painful and allowing for longer procedures, it inadvertently increased infection rates as longer operations meant wounds were exposed for longer periods to unhygienic conditions.

Impact of Germ Theory and Antiseptics

Louis Pasteur's germ theory (1861) provided the scientific basis for understanding infection. Joseph Lister then applied this theory to surgery, developing antiseptic methods from 1865. He used carbolic acid to sterilise instruments, dressings, and spray the surgical area, drastically reducing post-operative infection rates. Initially, Lister faced resistance due to the cumbersome nature of his methods and scepticism from other surgeons. However, his work ultimately led to the widespread adoption of antiseptic surgery and eventually aseptic surgery, which focused on preventing germs from entering the surgical area in the first place through sterilisation of all equipment and strict hygiene.