<P> Sir Alexander Fleming FRS FRSE FRCS ( 6 August 1881 -- 11 March 1955 ) was a Scottish physician , biologist , pharmacologist and botanist . His best - known discoveries are the enzyme lysozyme in 1923 and the world 's first antibiotic substance benzylpenicillin ( Penicillin G ) from the mould Penicillium notatum in 1928 , for which he shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain . He wrote many articles on bacteriology , immunology , and chemotherapy . </P>
<P> Sir Alexander Fleming FRS FRSE FRCS ( 6 August 1881 -- 11 March 1955 ) was a Scottish physician , biologist , pharmacologist and botanist . His best - known discoveries are the enzyme lysozyme in 1923 and the world 's first antibiotic substance benzylpenicillin ( Penicillin G ) from the mould Penicillium notatum in 1928 , for which he shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain . He wrote many articles on bacteriology , immunology , and chemotherapy . </P>
who discovered penicillin and how did he make the discovery
who discovered penicillin and how did he make the discovery
Sir Alexander Fleming
Sir Alexander Fleming