History of medicineLesson 2 of 3 in the course Modern medicine

Alexander Fleming: Lysozyme, Penicillin, and the Development of Antibiotics

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

This lesson follows Alexander Fleming from his childhood in Scotland to his early career as a physician and bacteriologist. Understanding his education and professional setting helps explain how he developed the skills and opportunities that later led to important discoveries.

Alexander Fleming was born on 6 August 1881 at Lochfield farm near Darvel, in Ayrshire, Scotland. He was the third of four children of Hugh Fleming and Grace Stirling Morton. His father died when Alexander was seven.

All flashcards

Why did Fleming question the use of antiseptics in deep wounds?
Antiseptics could fail to reach bacteria deep in a wound while damaging the body’s protective agents.
What was lysozyme?
An enzyme Fleming identified in 1922 that inhibits certain bacteria and is part of innate immunity.
What did Fleming observe on the contaminated staphylococcus culture plate in 1928?
Staphylococcal colonies near the mould had been destroyed, while colonies farther away remained normal.
How did Norman Heatley help the Oxford penicillin team?
He developed an acidity-based method for transferring penicillin from culture broth back into water.
What did Fleming warn about antibiotic resistance?
Exposure to too little penicillin or stopping treatment too soon could allow resistant bacteria to survive and multiply.

Quiz questions

  1. What pattern did Fleming observe on the staphylococcus culture plate contaminated by mould?Answer: Nearby staphylococcal colonies were destroyed, while more distant colonies remained normal.
  2. On what date did Fleming name the antibacterial substance penicillin?Answer: 7 March 1929.
  3. Which Gram-negative bacterium was affected by penicillin in Fleming’s tests?Answer: Neisseria gonorrhoeae.
  4. Who used penicillin in 1930 to cure eye infections in one adult and three infants?Answer: Cecil George Paine.
  5. What had been achieved with penicillin production by D-Day in 1944?Answer: Enough had been produced to treat all wounded Allied troops.

Based on the Wikipedia article Alexander Fleming, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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