Which university housed the team that restarted penicillin research in 1939?

The University of Oxford housed the team that restarted penicillin research in 1939. Howard Florey organized the group at Oxford’s Sir William Dunn School of Pathology, where researchers began treating Alexander Fleming’s earlier observation as a problem in biochemistry and medicine.

The team included Ernst Chain, Norman Heatley, Edward Abraham, Margaret Jennings and others. Chain brought Fleming’s relatively neglected 1929 paper to Florey’s attention, while Heatley developed practical methods for growing the mould and recovering its antibacterial substance. Their work turned penicillin from a laboratory curiosity into a potential treatment.

Oxford’s researchers demonstrated penicillin’s effects in laboratory cultures and in infected mice in 1940. The team then faced the difficult challenge of producing enough material for human treatment. Wartime Britain lacked the industrial capacity needed for mass production, so Florey and Heatley later sought American help.

A common mix-up is to credit Fleming’s London laboratory with the entire development story. Fleming discovered penicillin’s antibacterial action at St Mary’s Hospital, but the Oxford team revived, purified and tested it therapeutically. Fleming, Florey and Chain shared the 1945 Nobel Prize in Physiology or Medicine.