Louis Pasteur and the germ theory

Louis Pasteur and the germ theory - His work also...

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Louis Pasteur and the germ theory. Louis Pasteur worked in the middle and late 1800s.  He performed numerous experiments to discover why wine and dairy products became  sour, and he found that bacteria were to blame. Pasteur called attention to the  importance of microorganisms in everyday life and stirred scientists to think that if  bacteria could make the wine “sick,” then perhaps they could cause human illness.  Pasteur had to disprove spontaneous generation to sustain his theory, and he therefore  devised a series of swan-necked flasks filled with broth. He left the flasks of broth open  to the air, but the flasks had a curve in the neck so that microorganisms would fall into  the neck, not the broth. The flasks did not become contaminated (as he predicted they  would not), and Pasteur's experiments put to rest the notion of spontaneous generation. 
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Unformatted text preview: His work also encouraged the belief that microorganisms were in the air and could cause disease. Pasteur postulated the germ theory of disease, which states that microorganisms are the causes of infectious disease. Pasteur's attempts to prove the germ theory were unsuccessful. However, the German scientist Robert Koch provided the proof by cultivating anthrax bacteria apart from any other type of organism. He then injected pure cultures of the bacilli into mice and showed that the bacilli invariably caused anthrax. The procedures used by Koch came to be known as Koch's postulates (Figure 1 ). They provided a set of principles whereby other microorganisms could be related to other diseases....
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