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It has been demonstrated that a species of penicillium produces in culture a very powerful antibacterial substance which affects different bacteria in different degrees. Generally speaking it may be said that the least sensitive bacteria are the Gram-negative bacilli, and the most susceptible are the pyogenic cocci ... In addition to its possible use in the treatment of bacterial infections penicillin is certainly useful... for its power of inhibiting unwanted microbes in bacterial cultures so that penicillin insensitive bacteria can readily be isolated.

Alexander Fleming
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Alexander Fleming's Popular Quotes

Penicillin sat on a shelf for ten years while I was called a quack.

- Alexander Fleming

In my first publication I might have claimed that I had come to the conclusion, as a result of serious study of the literature and deep thought, that…

- Alexander Fleming

It is the lone worker who makes the first advance in a subject: the details may be worked out by a team, but the prime idea is due to the enterprise,…

- Alexander Fleming

One sometimes finds what one is not looking for.

- Alexander Fleming

(The discovery of penicillin) was a triumph of accident, a fortunate occurrence which happened while I was working on a purely academic bacteriologic…

- Alexander Fleming

Nature makes penicillin; I just found it.

- Alexander Fleming

If penicillin can cure those that are ill, Spanish sherry can bring the dead back to life.

- Alexander Fleming

Penicillin cures, but wine makes people happy.

- Alexander Fleming

I play with microbes. There are, of course, many rules to this play...but when you have acquired knowledge and experience it is very pleasant to brea…

- Alexander Fleming
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