Edexcel GCSE History (1HI0) — Medicine in Britain and the Western Front
Before the 20th century, the main treatment for syphilis was poisonous mercury, which often killed the patient instead of the disease. Paul Ehrlich, a former member of Robert Koch's team, wanted to find a safer, more targeted alternative. He noticed that specific dyes stained specific bacteria and hypothesised that a synthetic chemical could be created to act as a Magic Bullet. This would target and kill the disease-causing microbe without harming healthy cells.
First, between 1905 and 1907, Ehrlich and his team systematically tested hundreds of arsenic compounds against the syphilis microbe. Next, after testing 600 variations with absolutely no success, they temporarily abandoned the project. Finally, in 1909, Japanese scientist Sahachiro Hata joined the team and meticulously retested the discarded results, discovering that the 606th compound actually worked.
This successful compound was released to the public and marketed as Salvarsan 606 in 1910. However, because it was still an arsenic-based drug, it remained highly poisonous, required painful injections, and could be fatal if administered incorrectly.
A simple scratch from an infected needle used to be a death sentence, which is exactly what happened to a scientist's daughter in 1935. Gerhard Domagk, a German pathologist working for the chemical giant IG Farben, discovered the second magic bullet in 1932. He found that a bright red dye called Prontosil contained an active chemical agent called Sulphonamide, which stopped bacteria from multiplying.
First, Domagk rigorously tested Prontosil on mice infected with lethal streptococcus bacteria, proving that the treated mice easily survived the infection. Then, in 1935, his own daughter Hildegard contracted severe blood poisoning from a needle. Domagk gave her the untested drug, and she made a miraculous and complete recovery.
This discovery drastically reduced death rates from bacterial infections across Europe. For example, deaths from puerperal fever (childbed fever) at Queen Charlotte's Maternity Hospital dropped from 20% down to just 4.7%. It also sparked the rapid growth of the chemical industry, leading to other sulpha drugs that were later used to cure Winston Churchill of pneumonia during the Second World War.
We usually throw away mouldy food, but one specific type of mould ended up saving millions of lives. Alexander Fleming, a Scottish bacteriologist, had seen many soldiers die from infected wounds during the First World War. He spent years searching for chemical treatments, discovering the bacteria-killing enzyme lysozyme in human tears in 1922.
The major breakthrough happened entirely by chance in September 1928. First, Fleming went on a summer holiday, accidentally leaving a petri dish of staphylococcus bacteria uncovered on his laboratory desk. Then, upon returning, he noticed a mould called Penicillium notatum had grown on the dish. Crucially, he observed a clear ring around the mould where the bacteria had been completely destroyed.
Fleming realised this "mould juice" was an Antibiotic that was non-toxic to humans and remained effective even when heavily diluted. He published his findings in 1929 but could not take the research further. As a bacteriologist rather than a chemist, he lacked the funding and skills to isolate pure Penicillin, mistakenly believing it would be too slow-acting or ineffective when mixed with human blood.
Discovering a cure is only half the battle; figuring out how to extract and use it is what actually cures patients. In 1938, an Oxford University team led by Howard Florey and Ernst Chain revisited Fleming's research. Their goal was to achieve the Purification of penicillin so it could be safely injected as a reliable medicine.
First, their colleague Norman Heatley devised a creative extraction method using everyday items like milk churns, bedpans, and bathtubs to grow enough mould. Next, in May 1940, they conducted animal trials, successfully curing four mice infected with streptococcus while the untreated mice died. Finally, in February 1941, they conducted their first human trial on Albert Alexander, a policeman with severe Septicaemia.
Alexander showed massive improvement, proving the drug worked in humans, but he tragically died when the team ran out of their small supply. Realising British factories were entirely focused on producing explosives for the war effort, Florey took the research to the USA in July 1941 to seek industrial support.
How do you turn a laboratory experiment made in bathtubs into millions of doses for soldiers on the front line? The turning point for penicillin was the massive intervention of the US government after the attack on Pearl Harbor in December 1941. They provided massive interest-free loans to 21 pharmaceutical companies to fund the Mass Production of the drug.
First, researchers at the Peoria Lab in Illinois discovered that adding corn steep liquor to the mould increased the yield tenfold. Then, in 1943, an assistant named Mary Hunt found a better strain of mould on a cantaloupe melon that produced six times more penicillin than Fleming's original strain. Finally, pharmaceutical companies like Pfizer used gigantic 10,000-gallon vats for Deep-tank Fermentation, allowing them to grow the mould rapidly on an industrial scale.
By D-Day in June 1944, enough penicillin had been produced to treat 2.3 million Allied casualties. This enormous industrial and governmental effort reduced the death rate from infected wounds in the British Army from 15% down to almost zero.
Students often credit Alexander Fleming with making penicillin a usable medicine, but examiners only award marks to him for the initial 'discovery' in 1928, while Florey and Chain must be credited with its 'development'.
In 'Describe' questions about magic bullets, you must use sequential language (e.g., 'First', 'Then', 'Finally') to outline the step-by-step process of their discovery and testing.
When discussing factors that improved medicine, use Florey's move to the USA and the millions of dollars in US government loans as strong evidence for the roles of 'Government' and 'War'.
Make sure to clearly distinguish between 'Magic Bullets' like Salvarsan 606 (which are man-made synthetic chemicals) and 'Antibiotics' like penicillin (which are naturally derived from living organisms).
Magic Bullet
A synthetic chemical compound designed to target and destroy a specific disease-causing microbe without damaging healthy human cells.
Salvarsan 606
The first effective chemical treatment for syphilis, discovered in 1909, which was based on poisonous arsenic.
Prontosil
A red chemical dye discovered in 1932 that safely cured blood poisoning in humans and mice.
Sulphonamide
The active chemical agent found in Prontosil that prevents harmful bacteria from multiplying inside the body.
Antibiotic
A medicine produced by a natural microorganism, such as a mould, that destroys bacteria inside a living body.
Penicillin
The first natural antibiotic, discovered by Alexander Fleming in 1928 from a stray mould spore.
Purification
The complex chemical process of isolating the active disease-killing ingredient from the raw mould juice.
Septicaemia
A life-threatening medical condition caused by a severe bacterial infection entering the bloodstream, also known as blood poisoning.
Mass Production
The continuous manufacture of goods in enormous quantities using highly mechanised industrial processes.
Deep-tank Fermentation
An industrial technique using massive, aerated vats to grow microorganisms like mould on a huge scale.
Put your knowledge into practice — try past paper questions for History
Magic Bullet
A synthetic chemical compound designed to target and destroy a specific disease-causing microbe without damaging healthy human cells.
Salvarsan 606
The first effective chemical treatment for syphilis, discovered in 1909, which was based on poisonous arsenic.
Prontosil
A red chemical dye discovered in 1932 that safely cured blood poisoning in humans and mice.
Sulphonamide
The active chemical agent found in Prontosil that prevents harmful bacteria from multiplying inside the body.
Antibiotic
A medicine produced by a natural microorganism, such as a mould, that destroys bacteria inside a living body.
Penicillin
The first natural antibiotic, discovered by Alexander Fleming in 1928 from a stray mould spore.
Purification
The complex chemical process of isolating the active disease-killing ingredient from the raw mould juice.
Septicaemia
A life-threatening medical condition caused by a severe bacterial infection entering the bloodstream, also known as blood poisoning.
Mass Production
The continuous manufacture of goods in enormous quantities using highly mechanised industrial processes.
Deep-tank Fermentation
An industrial technique using massive, aerated vats to grow microorganisms like mould on a huge scale.
