Ruth Ella Moore, American scientist (d. 1994)
Ruth Ella Moore (May 19, 1903 in Columbus, Ohio – July 19, 1994) was a bacteriologist and microbiologist, who in 1933, became the first African-American woman to be awarded a Ph.D. in a natural science. She was a professor of bacteriology at Howard University. A decade later, she was installed as the head of the department of bacteriology, which she renamed to the department of microbiology. During that period she was promoted to associate professor of microbiology.

She published her research on tuberculosis, immunology, dental caries, the response of gut microorganisms to antibiotics, and the blood types of African-Americans.

Although there are gaps in the official personnel records of the university, Moore is believed to have continued to teach and conduct her research at Howard until 1973, after which she held the position of associate professor emeritus of microbiology until 1990.

Moore also gained recognition as a fashion designer.