Oswald Avery

Canadian-born American physician and medical researcher

Oswald Theodore Avery Jr. (October 21, 1877 – February 20, 1955) was a Canadian-American physician and medical researcher, known for the Avery–MacLeod–McCarty experiment. He was nominated for the Nobel Prize three times, but is famous for not winning the Nobel Prize.


  • In view of the fact that lobar pneumonia is prevalent in military camps in the United States, and that at present it is impossible to obtain white mice in sufficient numbers for carrying out the biologic tests necessary in the determination of types of pneumococcus, a rapid cultural method dispensing with the use of these animals is now proposed.
  • The reports of various observers indicate that great difference of opinion exists concerning the etiologic significance of B. influenza in the present epidemic of influenza. Some investigators have been able to isolate this organism from a large percentage of the cases that they have observed; others have succeeded in recovering it in very few instances. It is possible that technical difficulties in the isolation and growth of this microorganism may be in part responsible for the discordant results obtained in different laboratories.

Quotes about Oswald Avery