Salvador Edward Luria Italian-American biologist, winner of the Nobel Prize in Physiology or Medicine 1969 Date of Birth: 13.08.1912 Country: Italy

Biography of Salvador Edward Luria

Salvador Edward Luria, an Italian-American biologist, was born on August 13, 1912, in Turin, Italy. He attended the University of Turin and graduated with a degree in medicine in 1935. After completing his studies, Luria served as a medical officer in the Italian army for three years until 1938. Following his demobilization, he moved to Paris to work at the Institute of Radium.

During his time in Paris, Luria developed an interest in bacteriophages, which are viruses that infect bacterial cells. He conducted experiments on the effects of X-rays on bacteriophages, aiming to induce genetic mutations. In the midst of World War II, Luria emigrated to the United States and began working at the College of Physicians and Surgeons of Columbia University in New York.

In 1940, Luria met Max Delbrück, a molecular biologist from Vanderbilt University, at a meeting of the American Physiological Society in Philadelphia. They discovered that they were independently conducting similar research and decided to collaborate. With a grant from the Guggenheim Foundation, Luria continued his work at Princeton University and later at the bacteriology department of Indiana University.

In the mid-1940s, Luria and Delbrück encountered bacteria strains that were resistant to viruses and antibiotics. They developed the fluctuation method, a statistical analysis based on probability theory, to distinguish mutation-induced resistance from other types of resistance. In 1943, they presented their findings to the scientific community. That same year, Luria and Delbrück teamed up with Alfred Hershey, a microbiologist from Washington University in St. Louis, to study bacteriophages that infect Escherichia coli.

Independently, Delbrück and Hershey discovered gene recombination and genetic exchange between different lines of bacteriophages. In 1950, Luria proved that genes of bacteriophages (and viruses) undergo spontaneous mutations, a process analogous to that in bacteria. He then became a professor of bacteriology at the University of Illinois.

Luria held various positions throughout his career, including heading the bacteriology department at the Massachusetts Institute of Technology in 1959 and serving as a professor-consultant at the Salk Institute six years later. In 1969, Luria, along with Hershey and Delbrück, was awarded the Nobel Prize in Physiology or Medicine for their discoveries concerning the replication mechanism and genetic structure of viruses.

Luria received numerous accolades during his lifetime, including the Lepetit Prize in 1935, the Langmuir Prize in 1969, and the Louise Gross Horwitz Prize from Columbia University in 1969. He was a member of several prestigious scientific societies, such as the National Academy of Sciences, the American Academy of Arts and Sciences, the American Philosophical Society, and the American Society for Microbiology.

Salvador Edward Luria passed away on February 6, 1991, in Lexington, Kentucky.