Barnett Cohen
Barnett Cohen (1891–1952) was a Russian Empire-born American bacteriologist who performed the first ultra-microscopic surgeries, including on amoeba. Cohen received his Ph.D. from Yale University. He was president of the Society of American Bacteriologists, and a member of the American Association for the Advancement of Science,
the American Chemical Society, and American Public Health Association. References

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1891 births
1952 deaths
Emigrants from the Russian Empire to the United States
Yale University alumni
American bacteriologists