Discussion
Who demonstrated the role of bacteria in causing disease?
Answer: B
The role of bacteria in causing disease was demonstrated by Robert Koch.
In 1876 Koch showed that Bacillus anthracis caused anthrax, the first proof that a specific bacterium causes a specific disease. He went on to discover the tubercle bacillus (1882) and the cholera vibrio (1883), and his postulates set the criteria for proving that a microbe causes a disease.
Joseph Lister introduced antiseptic surgery with carbolic acid. Edward Jenner developed the smallpox vaccine using cowpox. Alexander Fleming discovered penicillin in 1928. Each worked on prevention or treatment rather than proving that bacteria cause disease.
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