Which scientist proved that infections were caused by microorganisms?

Which scientist proved that infections were caused by microorganisms?
 
  a. Edward Jenner
  b. Robert Koch
  c. Louis Pasteur
  d. Emil von Behring

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Campylobacter infections are the MOST common foodborne infections in the United States.
 
  Indicate whether the statement is true or false.

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Why are antibiotics of little value by themselves in the treatment of cholera?
 
  What will be an ideal response?

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What is the difference between food poisoning and food infection? Are antibiotics useful in either of them?
 
  What will be an ideal response?

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What makes Listeria monocytogenes an especially difficult-to-prevent foodborne pathogen? Once in the human body, how does it evade the immune system?
 
  What will be an ideal response?