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Nasir tyabji - gaining technical know-how in an unequal world ...How penicillin is made. E had reached a point where a team of specialists was needed - the job was too big for one person. His team commenced a careful investigation of the properties of anti-bacterial substances that are produced by mould. One member of the team, Ernst Chain, found an article about Alexander Fleming's work while flicking through a medical journal, and this prompted them to begin looking at penicillin. Individual members of the group concentrated their attention on areas in which they had the most knowledge, but they often met to exchange ideas. Chain worked on purifying penicillin with Edward Abraham. Norman Heatley improvised methods for extracting penicillin using ether and bedpans (see 'penicillin production' below). A. D. Gardner and Jena Orr-Ewing studied how penicillin reacted with other organisms. Howard Florey looked with Margaret Jennings at the impact of penicillin on animals. Ethel Florey later worked with her husband on clinical trials of penicillin. In May, 1940 they performed o![]() |
Jstor: how penicillin kills bacteria: progress and problemsNe of the most important medical experiments in history. The work was so urgent that they came in to begin the experiment on the weekend, and on Saturday 25 May, Florey's team tested penicillin on eight mice injected with a lethal dose of streptococci bacteria. Four of the mice were treated with penicillin, while four were used as controls. By the next day, the treated mice had recovered and the untreated mice were dead. In the early days of World War II, the lives of eight mice may seem insignificant. But their rescue by penicillin led to the treatment of Allied soldiers as early as D-Day, in June 1944, and probably influenced the outcome of the war. The First Patient The results were so exciting Florey knew that it was time to test the drug on humans. The first patient in 1941 had been scratched by a rose thorn. Albert Alexander's whole face, eyes and scalp had swollen. He had already had an eye removed and abscesses drained; even his remaining eye had to be lanced to relieve the pai |
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how penicillin is made:
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