Alastair Thornton, School of Chemistry, University of Bristol.
Penicillin, the first true antibiotic, was discovered in 1928 by Scottish
bacteriologist Sir Alexander Fleming. His discovery eventually lead to the wide
spread production of a drug that has saved thousands of life’s especially when
it was introduced to treat war wounds in the second world war.
This website gives a brief introduction to its discovery and manufacture
and goes some way to describe how it kills bacteria.