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Rachel Fuller Brown

American chemist (1898–1980)

  • 5 min read
  • 4 chapters

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Through Microorganism and Antibiotic

Nystatin, still produced today under various trade names, not only cures a variety of potentially devastating fungal infections, but has also been used to combat Dutch Elm disease in trees and to restore artwork damaged by water and mold.

Life

On November 23, 1898, Rachel Fuller Brown was born in Springfield, Massachusetts. When she was 14 years old, her father left the family. Rachel went to Commercial High School, but later switched to Central High School because her mother wanted her to have a more traditional education. Henriette F. Dexter, a friend of Rachel’s grandmother, saw how determined Rachel was to go to college and paid for her to attend Mount Holyoke College. She majored in chemistry and earned her BA in chemistry and history in 1920. Eventually, she earned an MS in organic chemistry from the University of Chicago. After taking some courses at Harvard, Brown came back to the University of Chicago for more graduate work. She submitted her PhD thesis, but there were complications and she had to leave Chicago before receiving PhD. She found a job at the Division of Laboratories and Research in New York. The Division of Laboratories and Research was known for its research in creating vaccines and antiserums. Brown worked there for 7 years and then returned to Chicago to receive her PhD.

In 1948, Brown began a project with Elizabeth Lee Hazen, who was researching fungi and bacteria. This project led them to discover an antibiotic that fought fungal infections. In the 1930s, antibiotics were becoming more popular to fight bacteria, but a side effect was that the antibiotics caused fungus to grow. The antibiotics were so strong, they killed all the bacteria, including the healthy bacteria; this left no bacteria to control the fungus. The fungus caused sore mouths or stomach pain. Other fungi attacked the central nervous system and caused ringworm and athlete’s foot. However, there were no medications to fight fungal diseases.

Elizabeth cultured organisms found in soil and tested them to fight against fungi. If there was good activity, she would send it to Rachel in a mason jar. Brown would isolate the active agent in the culture, which could be used to cure fungal diseases. After testing hundreds of soil samples that were highly toxic to animals and not safe for humans, the two women found a culture that could work for animals. They discovered that this microorganism produced two antifungal substances. One of these was too toxic for test animals, but the other one was promising. They named the drug Nystatin. Nystatin was the first antifungal antibiotic that was safe for humans. It could be combined with antibacterial drugs to help with side effects. Nystatin was also effective in stopping the growth of fungi on works of art in Italy that were damaged by flooding. In 1950, Brown and Hazen showed their work at the National Academy of Sciences, and in 1954, the drug was made for human use.

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