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There are examples of bacteria growing in [[mutualism|mutualistic]] rather than parasitic fashion.  The digestive systems of most organisms, including humans, depend on the presence of beneficial bacteria in order to properly digest food, especially plant matter.
 
There are examples of bacteria growing in [[mutualism|mutualistic]] rather than parasitic fashion.  The digestive systems of most organisms, including humans, depend on the presence of beneficial bacteria in order to properly digest food, especially plant matter.
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Infections are usually fought by the use of [[Antibiotics]], which kill the bacteria causing the infection.  [[Penicillin]] is one well known example.
    
==References==
 
==References==
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